0001628280-26-010694 | 10-K | XBRL Viewer

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Other (Expense) income, net - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
Non-income tax refunds and other related credits		$ 2,922	$ 3,742	$ 1,339
Foreign currency transaction losses		2,200	800	7,800
Multiemployer plan withdrawal charge		923	0	0
Business interruption insurance proceeds	$ 1,000	0	$ 1,000	$ 0
Interest rate swaps \| Dipsol
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign exchange loss		1,400
Foreign Tax Jurisdiction
Income Tax Paid, by Individual Jurisdiction [Line Items]
Non-income tax refunds and other related credits		$ 1,800

Investment in Associated Companies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments in associated companies	$ 106,915	$ 98,012
Dividends and distributions received from associated companies by investments	$ 8,800	9,100	$ 4,200
Houghton Korea \| Asia/Pacific
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%
Investments in associated companies	$ 65,600	66,300
Primex \| Americas
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	32.00%
Investments in associated companies	$ 29,100	24,900
SKT \| Americas
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	30.00%
SKT \| Asia/Pacific
Schedule of Equity Method Investments [Line Items]
Investments in associated companies	$ 5,000
Nippon Japan \| Asia/Pacific
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%
Investments in associated companies	$ 6,700	6,300
Kelko Panama \| Americas
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%
Investments in associated companies	$ 500	$ 500

Equity - Schedule of Stock Options Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares shares
Number of Options
Options outstanding, beginning balance (in shares) \| shares	58,612
Options exercised (in shares) \| shares	2,587
Options expired (in shares) \| shares	5,661
Options outstanding, ending balance (in shares) \| shares	50,364
Options exercisable, number of options, (in shares) \| shares	50,364
Weighted Average Exercise Price (per option)
Options outstanding, beginning balance (in dollars per share) \| $ / shares	$ 219.13
Options exercised (in dollars per share) \| $ / shares	136.64
Options expired (in dollars per share) \| $ / shares	189.17
Options outstanding, ending balance (in dollars per share) \| $ / shares	196.23
Options exercisable, weighted average exercise price (in dollars per share) \| $ / shares	$ 196.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, weighted average remaining contractual term	2 years 4 months 24 days
Options exercisable, weighted average remaining contractual term	2 years 4 months 24 days
Options outstanding, aggregate intrinsic value \| $	$ 0
Options exercisable, aggregate intrinsic value \| $	$ 0

Inventories (Tables)

12 Months Ended

Dec. 31, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories as of December 31, 2025 and 2024 were as follows:


	2025		2024
Raw materials and supplies	$	124,751	$	112,457
Work in process, finished goods and reserves	141,025		115,015
Total inventories	$	265,776	$	227,472

Income Taxes - Schedule of Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income tax provision at the Federal statutory tax rate	$ 1,476	$ 32,562	$ 32,156
State and local income taxes, net of federal	1,351	1,905	2,158
Effect of cross-border tax laws
Global Intangible Low-Taxed Income (GILTI), net of FTC's	2,100
Foreign-Derived Intangible Income (FDII)	(1,180)	(1,336)	(1,147)
Foreign branch income, net of FTC's	(5,060)
Subpart F income, net of FTC's	182
Other Cross-Border Tax	224
Tax Credits
R&D		(1,902)	(2,000)
Changes in valuation allowances	3,480
Nontaxable or nondeductible items
Share-based compensation	1,642
Other nontaxable or nondeductible items	254
Other adjustments
Other	(852)	414	1,080
Change in unrecognized tax benefits	(5,708)	(2,372)	(598)
Foreign tax effects:
Statutory income tax rate differential		1,315	4,731
Withholding taxes		8,418	11,193
Non-deductible impairment		0	0
Unremitted earnings		(30)	1,211
Tax law changes / reform		(37)	47
U.S. tax on foreign operations		9,625	9,014
FTC's		(6,898)	(3,432)
Share-based compensation		2,345	1,814
Audit settlements		0	456
Non-deductible expenses		341	416
Intercompany transfer of intangible assets		2,295	(584)
Provision to return and other adjustments		2,655	(930)
Taxes on income before equity in net income of associated companies	$ 24,607	$ 49,300	$ 55,585
Percent
Income tax provision at the Federal statutory tax rate	21.00%
State and local income taxes, net of federal	19.20%
Effect of cross-border tax laws
Global Intangible Low-Taxed Income (GILTI), net of FTC's	29.90%
Foreign-Derived Intangible Income (FDII)	(16.80%)
Foreign branch income, net of FTC's	(0.720)
Subpart F income, net of FTC's	0.026
Other Cross-Border Tax	3.20%
Tax Credits
Changes in valuation allowances	49.50%
Nontaxable or nondeductible items
Share-based compensation	23.40%
Other nontaxable or nondeductible items	3.60%
Other adjustments
Other	(12.10%)
Change in unrecognized tax benefits	(81.20%)
Foreign tax effects:
Effective Tax Rate	350.10%
U.S.
Tax Credits
R&D	$ (566)
Tax Credits
R&D	(8.10%)
Brazil
Other adjustments
Other	$ (198)
Foreign tax effects:
Statutory income tax rate differential	$ 2,949
Other adjustments
Other	(2.80%)
Foreign tax effects:
Statutory income tax rate differential	42.00%
China
Tax Credits
R&D	$ (1,402)
Other adjustments
Other	266
Foreign tax effects:
Withholding taxes	$ 4,100
Tax Credits
R&D	(19.90%)
Other adjustments
Other	3.80%
Foreign tax effects:
Withholding taxes	0.583
France
Other adjustments
Other	$ (229)
Foreign tax effects:
Non-deductible impairment	$ 3,197
Other adjustments
Other	(3.30%)
Foreign tax effects:
Non-deductible impairment	45.50%
Germany
Other adjustments
Other	$ (835)
Foreign tax effects:
Non-deductible impairment	$ 5,257
Other adjustments
Other	(11.90%)
Foreign tax effects:
Non-deductible impairment	74.80%
Korea
Foreign tax effects:
Withholding taxes	$ 1,760
Foreign tax effects:
Withholding taxes	0.250
Malta
Other adjustments
Other	$ 1,009
Foreign tax effects:
Statutory income tax rate differential	$ (3,166)
Other adjustments
Other	14.40%
Foreign tax effects:
Statutory income tax rate differential	(45.00%)
Mexico
Other adjustments
Other	$ 599
Foreign tax effects:
Statutory income tax rate differential	$ 1,896
Other adjustments
Other	8.50%
Foreign tax effects:
Statutory income tax rate differential	27.00%
Netherlands
Other adjustments
Other	$ 2,060
Other adjustments
Other	29.30%
Spain
Other adjustments
Other	$ 141
Foreign tax effects:
Non-deductible impairment	$ 1,605
Other adjustments
Other	2.00%
Foreign tax effects:
Non-deductible impairment	22.80%
United Kingdom
Other adjustments
Other	$ 3
Foreign tax effects:
Non-deductible impairment	$ 2,451
Other adjustments
Other	0.00%
Foreign tax effects:
Non-deductible impairment	34.90%
Other foreign jurisdictions
Foreign tax effects:
Statutory income tax rate differential	$ 5,801
Foreign tax effects:
Statutory income tax rate differential	82.50%

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common stock	Capital in excess of par value	Retained earnings	Accumulated other comprehensive loss	Noncontrolling interest
Beginning balance at Dec. 31, 2022	$ 1,278,585	$ 17,950	$ 928,288	$ 469,920	$ (138,240)	$ 667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	112,872			112,748		124
Amounts reported in other comprehensive income (loss)	13,806				13,825	(19)
Dividends declared	(32,027)			(32,027)
Distributions to noncontrolling affiliate shareholders	(169)					(169)
Share issuance and equity-based compensation plans, net	11,855	42	11,813
Ending balance at Dec. 31, 2023	1,384,922	17,992	940,101	550,641	(124,415)	603
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	116,729			116,644		85
Amounts reported in other comprehensive income (loss)	(77,276)				(77,204)	(72)
Dividends declared	(33,554)			(33,554)
Shares purchased under share repurchase program, net of excise taxes	(49,659)	(313)	(49,346)
Share issuance and equity-based compensation plans, net	13,021		13,026
Share issuance and equity-based compensation plans, net		(5)
Ending balance at Dec. 31, 2024	1,354,183	17,674	903,781	633,731	(201,619)	616
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,401)			(2,488)		87
Amounts reported in other comprehensive income (loss)	86,190				85,958	232
Noncontrolling interest from acquisition	2,451					2,451
Dividends declared	(34,627)			(34,627)
Shares purchased under share repurchase program, net of excise taxes	(41,885)	(365)	(41,520)
Share issuance and equity-based compensation plans, net	12,588	23	12,565
Ending balance at Dec. 31, 2025	$ 1,376,499	$ 17,332	$ 874,826	$ 596,616	$ (115,661)	$ 3,386

Business Segments - Schedule of Information of Company's Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 1,888,634	$ 1,839,686	$ 1,953,313
Product costs	974,638	930,161	1,025,391
Other segment items	465,564	443,404	438,617
Segment operating earnings	448,432	466,121	489,305
Inventory step-up amortization	6,022	0	0
Gain on inventory adjustments for inventory previously sold	2,900
Americas
Segment Reporting Information [Line Items]
Gain on inventory adjustments for inventory previously sold	700
EMEA
Segment Reporting Information [Line Items]
Gain on inventory adjustments for inventory previously sold	2,200
Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,888,634	1,839,686	1,953,313
Inventory step-up amortization	6,000
Operating Segments \| Americas
Segment Reporting Information [Line Items]
Net sales	865,332	882,131	977,095
Product costs	429,432	427,399	497,690
Other segment items	208,331	210,775	213,369
Segment operating earnings	227,569	243,957	266,036
Inventory step-up amortization	2,600
Operating Segments \| Asia/Pacific
Segment Reporting Information [Line Items]
Net sales	475,192	421,120	404,871
Product costs	251,855	216,432	209,422
Other segment items	99,114	81,950	76,991
Segment operating earnings	124,223	122,738	118,458
Inventory step-up amortization	3,000
Operating Segments \| EMEA
Segment Reporting Information [Line Items]
Net sales	548,110	536,435	571,347
Product costs	293,351	286,330	318,279
Other segment items	158,119	150,679	148,257
Segment operating earnings	96,640	$ 99,426	$ 104,811
Inventory step-up amortization	$ 400

Business Segments - Schedule of Long-Lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 489,358	$ 379,024	$ 366,349
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	241,261	217,687	217,834
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	57,106	32,082	24,317
Foreign operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 190,991	$ 129,255	$ 124,198

Hedging Activities - Narrative (Details) € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Apr. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 300.0					$ 155.3
Derivative term (in years)	3 years
Interest rate swaps \| Dipsol
Derivatives, Fair Value [Line Items]
Loss relating to the change in fair value of instruments		$ 1.4
Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative term (in years)		1 month
Currency Swap
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount			$ 75.0		$ 100.0
Derivative, fixed interest rate (as a percent)			1.90%	1.90%
Derivative average fixed interest rate					3.10%
Currency Swap, Euro
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount \| €				€ 65.8
Derivative average fixed interest rate			0.00%	0.00%
Currency Swap, Yen
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount					$ 14,300.0
Derivative average fixed interest rate					0.00%

Business Segments

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Business Segments

The Company’s operating segments, which are consistent with its reportable segments, reflect the structure of the Company’s internal organization and the manner by which the CODM, which is the Company’s Chief Executive Officer, allocates resources and assesses performance.

The CODM evaluates performance for the Company’s operating segments based on segment operating earnings. Segment operating earnings for each of the Company’s reportable segments are comprised of the segment’s net sales less directly related product costs and other segment items. Operating expenses not directly attributable to the net sales of each respective segment, such as certain corporate and administrative costs, impairment charges, and restructuring charges, are not included in segment operating earnings. Other items not specifically identified with the Company’s reportable segments include Interest expense and Other (expense) income, net.

The CODM uses segment operating earnings to allocate resources for each segment predominantly in the annual budget and forecasting process. The CODM considers budget-to-actual variances on a monthly basis for segment operating earnings when making decisions about allocating capital and personnel to the segments. The CODM also uses segment operating earnings to assess the performance for each segment and in the compensation of certain employees.

Segment asset information is not regularly provided to or reviewed by the CODM. Therefore, the Company does not disclose segment asset information for each reportable segment.

The following table presents information about the performance of the Company’s reportable segments for the years ended December 31, 2025, 2024 and 2023.


	Americas		EMEA		Asia/Pacific		Totals
2025
Net sales (1)	$	865,332	$	548,110	$	475,192	$	1,888,634
Significant segment expenses
Product costs (2) (4) (5)	429,432		293,351		251,855		974,638
Other segment items (3)	208,331		158,119		99,114		465,564
Segment operating earnings	$	227,569	$	96,640	$	124,223	$	448,432
2024
Net sales (1)	$	882,131	$	536,435	$	421,120	$	1,839,686
Significant segment expenses
Product costs (2)	427,399		286,330		216,432		930,161
Other segment items (3)	210,775		150,679		81,950		443,404
Segment operating earnings	$	243,957	$	99,426	$	122,738	$	466,121
2023
Net sales (1)	$	977,095	$	571,347	$	404,871	$	1,953,313
Significant segment expenses
Product costs (2)	497,690		318,279		209,422		1,025,391
Other segment items (3)	213,369		148,257		76,991		438,617
Segment operating earnings	$	266,036	$	104,811	$	118,458	$	489,305

(1) Net sales relate to external customers only. All intersegment sales are eliminated in consolidation.

(2) Product costs include the costs of raw materials and are recorded in Cost of goods sold in the Company’s Consolidated Statements of Operations.

(3) Other operating expenses include overhead costs of operating the Company’s production facilities and providing chemical management services to customers and direct SG&A costs.

(4) Product costs includes the $6.0 million amortization of the fair value step-up in Dipsol's inventories as a result of the acquisition for the year ended December 31, 2025, which is comprised of approximately $2.6 million in the Americas segment, $3.0 million in the Asia/Pacific segment, and $0.4 million in the EMEA segment.

(5) Product costs includes a $2.9 million gain related to immaterial out-of-period adjustments for inventory for the year ended December 31, 2025, which was comprised of a $0.7 million gain in the Americas segment and a $2.2 million gain in the EMEA segment.

The following table presents a reconciliation of the Company’s segment operating earnings to income before taxes and equity in net income of associated companies in the Company’s Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023.


	2025		2024		2023
Segment operating earnings	$	448,432	$	466,121	$	489,305
Restructuring and related charges, net	(35,130)		(6,530)		(7,588)
Impairment charges	(88,840)		—		—
Non-operating and administrative expenses	(205,651)		(203,956)		(206,398)
Depreciation of corporate assets and amortization	(65,825)		(60,929)		(60,824)
Operating income	$	52,986	$	194,706	$	214,495
Other (expense) income, net	(1,909)		1,354		(10,672)
Interest expense	(44,048)		(41,002)		(50,699)
Income before taxes and equity in net income of associated companies	$	7,029	$	155,058	$	153,124

The following tables present information regarding the Company’s reportable segments’ depreciation for identifiable assets for the years ended December 31, 2025, 2024 and 2023:


Depreciation	2025		2024		2023
Americas	$	11,770	$	13,646	$	12,298
EMEA	8,411		7,641		7,321
Asia/Pacific	7,447		4,608		4,214
Total segment depreciation	$	27,628	$	25,895	$	23,833

The following tables summarize net sales attributed to geographic regions based on the country of origin and long-lived assets attributed to geographic regions based on asset location for the years ended December 31, 2025, 2024 and 2023:


Net sales	2025		2024		2023
United States	$	622,308	$	637,755	$	718,742
China	251,177		230,622		231,331
Other foreign operations	1,015,149		971,309		1,003,240
Total net sales	$	1,888,634	$	1,839,686	$	1,953,313


Long-lived assets	2025		2024		2023
United States	$	241,261	$	217,687	$	217,834
China	57,106		32,082		24,317
Foreign operations	190,991		129,255		124,198
Total long-lived assets	$	489,358	$	379,024	$	366,349

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/280/tableOfContent

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

+ Details

Basis of Presentation and Significant Accounting Policies - Long-lived Assets (Details)	Dec. 31, 2025
Building and Building Improvements \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Building and Building Improvements \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	33 years
Machinery and Equipment \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	4 years
Machinery and Equipment \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years

Inventories

12 Months Ended

Dec. 31, 2025

Inventory Disclosure [Abstract]

Inventories

Inventories as of December 31, 2025 and 2024 were as follows:


	2025		2024
Raw materials and supplies	$	124,751	$	112,457
Work in process, finished goods and reserves	141,025		115,015
Total inventories	$	265,776	$	227,472

Debt - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
Debt - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Unused borrowing capacity			$ 57.4
Letters of credit outstanding amount			7.0
Other Assets
Debt Instrument [Line Items]
Debt issuance costs			1.4		$ 2.4
Interest rate swaps
Debt Instrument [Line Items]
Derivative liability, notional amount		$ 300.0		$ 155.3
Derivative, term of contract		3 years
EURO Term Loan
Debt Instrument [Line Items]
Credit facilities	$ 150.0
U.S. Term Loan
Debt Instrument [Line Items]
Credit facilities	600.0
Revolver
Debt Instrument [Line Items]
Credit facilities	$ 500.0
Credit facility as percentage of consolidated EBITDA	100.00%
Debt issuance costs			$ 0.7		1.1
Amended Credit Facility
Debt Instrument [Line Items]
Maximum increase in borrowing capacity	$ 300.0
Interest rate adjustment	0.10%
Maximum amount of dividends and share purchases under covenant	$ 75.0
Percentage of dividends and share repurchase of consolidated adjusted EBITDA	25.00%
Long-term debt, term			5 years
Amended Credit Facility \| Minimum
Debt Instrument [Line Items]
Commitment fee (in percent)			0.15%
Amended Credit Facility \| Minimum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable interest rate	1.00%
Amended Credit Facility \| Minimum \| Base rate loans rate
Debt Instrument [Line Items]
Variable interest rate	0.00%
Amended Credit Facility \| Minimum \| Alternative currency term rate plus the applicable rate
Debt Instrument [Line Items]
Variable interest rate	1.75%
Amended Credit Facility \| Maximum
Debt Instrument [Line Items]
Consolidated net leverage ratio	2.50
Commitment fee (in percent)			0.275%
Amended Credit Facility \| Maximum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable interest rate	1.75%
Amended Credit Facility \| Maximum \| Base rate loans rate
Debt Instrument [Line Items]
Variable interest rate	0.75%
Amended Credit Facility \| Maximum \| Alternative currency term rate plus the applicable rate
Debt Instrument [Line Items]
Variable interest rate	1.00%
Line of Credit \| Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding amount			$ 2.5
Line of Credit \| Maximum
Debt Instrument [Line Items]
Initial consolidated net debt to consolidated EBITDA ratio	4.00
Original Credit Facility and the Amended Credit Facility
Debt Instrument [Line Items]
Weighted average variable interest rate			5.20%
Previous Credit Facility
Debt Instrument [Line Items]
Weighted average variable interest rate			4.70%
Revolving Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Unused borrowing capacity			$ 268.5
Domestic Line of Credit
Debt Instrument [Line Items]
Derivative variable interest rate		3.64%
Derivative, fixed interest rate (as a percent)			5.00%
Industrial Development Bond Due 2028
Debt Instrument [Line Items]
Industrial development revenue bond			$ 10.0		$ 10.0

Income Taxes- Schedule of Changes in Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Balance at January 1,	$ 27,993	$ 24,182	$ 11,730
Net charges to income tax expense	5,281	5,693	14,393
Release of valuation allowance	(1,228)	(1,882)	(1,941)
Purchase accounting adjustments	1,330	0	0
Balance at December 31,	$ 33,376	$ 27,993	$ 24,182

Business Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Apr. 01, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair value of liabilities assumed
Goodwill	$ 501,720		$ 518,894	$ 512,518
Dipsol
Fair value of assets acquired
Cash and cash equivalents		$ 30,084
Accounts receivable		16,481
Inventories		17,962
Prepaid expenses and other current assets		1,231
Property, plant and equipment		39,450
Right-of-use lease assets		2,534
Other intangible assets		55,000
Investments in associated companies		5,096
Deferred tax assets		989
Other non-current assets		4,165
Total Assets Acquired		172,992
Fair value of liabilities assumed
Accounts payable		6,763
Accrued compensation		1,528
Other accrued liabilities		2,415
Long-term lease liabilities		1,446
Deferred income tax liabilities		25,836
Total Liabilities Assumed		37,988
Noncontrolling interest		(2,451)
Goodwill		53,059
Total Consideration		$ 185,612
Working capital measurement period adjustments	$ 200

Business Segments (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of information about the performance of the Company's reportable segments, sales and total assets

The following table presents information about the performance of the Company’s reportable segments for the years ended December 31, 2025, 2024 and 2023.


	Americas		EMEA		Asia/Pacific		Totals
2025
Net sales (1)	$	865,332	$	548,110	$	475,192	$	1,888,634
Significant segment expenses
Product costs (2) (4) (5)	429,432		293,351		251,855		974,638
Other segment items (3)	208,331		158,119		99,114		465,564
Segment operating earnings	$	227,569	$	96,640	$	124,223	$	448,432
2024
Net sales (1)	$	882,131	$	536,435	$	421,120	$	1,839,686
Significant segment expenses
Product costs (2)	427,399		286,330		216,432		930,161
Other segment items (3)	210,775		150,679		81,950		443,404
Segment operating earnings	$	243,957	$	99,426	$	122,738	$	466,121
2023
Net sales (1)	$	977,095	$	571,347	$	404,871	$	1,953,313
Significant segment expenses
Product costs (2)	497,690		318,279		209,422		1,025,391
Other segment items (3)	213,369		148,257		76,991		438,617
Segment operating earnings	$	266,036	$	104,811	$	118,458	$	489,305

(1) Net sales relate to external customers only. All intersegment sales are eliminated in consolidation.

(2) Product costs include the costs of raw materials and are recorded in Cost of goods sold in the Company’s Consolidated Statements of Operations.

(3) Other operating expenses include overhead costs of operating the Company’s production facilities and providing chemical management services to customers and direct SG&A costs.


	2025		2024		2023
Segment operating earnings	$	448,432	$	466,121	$	489,305
Restructuring and related charges, net	(35,130)		(6,530)		(7,588)
Impairment charges	(88,840)		—		—
Non-operating and administrative expenses	(205,651)		(203,956)		(206,398)
Depreciation of corporate assets and amortization	(65,825)		(60,929)		(60,824)
Operating income	$	52,986	$	194,706	$	214,495
Other (expense) income, net	(1,909)		1,354		(10,672)
Interest expense	(44,048)		(41,002)		(50,699)
Income before taxes and equity in net income of associated companies	$	7,029	$	155,058	$	153,124

The following tables present information regarding the Company’s reportable segments’ depreciation for identifiable assets for the years ended December 31, 2025, 2024 and 2023:


Depreciation	2025		2024		2023
Americas	$	11,770	$	13,646	$	12,298
EMEA	8,411		7,641		7,321
Asia/Pacific	7,447		4,608		4,214
Total segment depreciation	$	27,628	$	25,895	$	23,833


Net sales	2025		2024		2023
United States	$	622,308	$	637,755	$	718,742
China	251,177		230,622		231,331
Other foreign operations	1,015,149		971,309		1,003,240
Total net sales	$	1,888,634	$	1,839,686	$	1,953,313

Schedule of reportable segments' long-lived assets, including certain identifiable assets


Long-lived assets	2025		2024		2023
United States	$	241,261	$	217,687	$	217,834
China	57,106		32,082		24,317
Foreign operations	190,991		129,255		124,198
Total long-lived assets	$	489,358	$	379,024	$	366,349

Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance lease assets	$ 1.4	$ 1.0
Depreciation expense	$ 30.4	$ 25.9	$ 23.8

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment, Gross [Abstract]
Land	$ 35,651	$ 25,143
Building and improvements	178,248	149,783
Machinery and equipment	321,879	272,188
Construction in progress	69,009	35,919
Property, plant and equipment, at cost	604,787	483,033
Less: accumulated depreciation	(291,364)	(253,501)
Total property, plant and equipment, net	$ 313,423	$ 229,532

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Taxes on Income Before Equity in Net Income

Taxes on income before equity in net income of associated companies for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
Current:
Federal	$	9,373	$	15,276	$	12,159
State	2,106		2,395		2,938
Foreign	43,556		41,662		51,930
Total	55,035		59,333		67,027
Deferred:
Federal	(11,411)		(4,385)		518
State	(310)		(24)		(163)
Foreign	(18,707)		(5,624)		(11,797)
Total	$	(30,428)	$	(10,033)	$	(11,442)
Taxes on income before equity in net income of associated companies	$	24,607	$	49,300	$	55,585

Schedule of Components of Income Before Taxes

The components of income before taxes and equity of associated companies for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
U.S.	$	(11,519)	$	17,167	$	14,520
Foreign	18,548		137,891		138,604
Total	$	7,029	$	155,058	$	153,124

Schedule of Deferred Tax Assets and Liabilities

Total deferred tax assets and liabilities are composed of the following as of December 31, 2025 and 2024:


	2025		2024
Pension and other postretirement benefits	$	4,426	$	5,472
Allowance for credit losses	2,232		1,895
Insurance and litigation reserves	614		565
Performance incentives	5,291		5,582
Equity-based compensation	3,634		2,891
Prepaid expense	458		426
Operating loss carryforward	32,065		24,702
Foreign tax credit and other credits	23,516		19,516
Interest	22,786		16,423
Restructuring reserves	2,230		158
Right-of-use lease assets	8,790		7,629
Inventory reserves	3,596		2,423
Research and development	14,036		12,608
Other	3,242		1,261
Total deferred tax assets, gross	126,916		101,551
Valuation allowance	(33,376)		(27,993)
Total deferred tax assets, net	$	93,540	$	73,558
Depreciation	14,095		9,814

Intangibles	185,501		170,309
Lease liabilities	9,661		8,575
Outside basis in equity investment	4,500		6,080
Unremitted earnings	8,469		8,392
Total deferred tax liabilities	$	222,226	$	203,170
Total net deferred tax liabilities	$	(128,686)	$	(129,612)

Schedule of Classification of Net Deferred Tax Assets and Liabilities

The Company’s net deferred tax assets and liabilities are classified in the Consolidated Balance Sheets as of December 31, 2025 and 2024 as follows:


	2025		2024
Non-current deferred tax assets	$	12,128	$	9,216
Non-current deferred tax liabilities	140,814		138,828
Total net deferred tax liabilities	$	(128,686)	$	(129,612)

Schedule of Changes in Deferred Tax Asset Valuation Allowance

The following are the changes in the Company’s deferred tax asset valuation allowance for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023

Balance at January 1,	$	27,993	$	24,182	$	11,730
Net charges to income tax expense	$	5,281	$	5,693	$	14,393
Release of valuation allowance	$	(1,228)	$	(1,882)	$	(1,941)
Purchase accounting adjustments	$	1,330	$	—	$	—
Balance at December 31,	$	33,376	$	27,993	$	24,182

Schedule of Payments for Income Taxes, Net

Payments for income taxes including withholding taxes, net for the year ended December 31, 2025 are as follows ($ in thousands):


	2025
U.S. Federal	$	7,163
U.S. State (1)	2,090
Foreign
Brazil	11,592
China	15,040

India	3,422
Mexico	9,149

Other	11,255
Total income taxes paid, net	$	59,711

(1) During the year ended December 31, 2025, there were no individual state jurisdictions with cash taxes paid that equaled or exceeded 5% of total income taxes paid.

Schedule of Reconciliation of Income Taxes

The following is a reconciliation of income taxes at the Federal statutory rate with income taxes recorded by the Company for the year ended December 31, 2025:


	2025
	Total			%
Income tax provision at the Federal statutory tax rate	1,476			21.0	%
State and local income taxes, net of federal (1)	1,351		$—	19.2	%
Effect of cross-border tax laws
Global Intangible Low-Taxed Income (GILTI), net of FTC's	2,100			29.9	%
Foreign-Derived Intangible Income (FDII)	(1,180)			(16.8)	%
Foreign branch income, net of FTC's	(5,060)			(72.0)	%
Subpart F income, net of FTC's	182			2.6	%
Other Cross-Border Tax	224			3.2	%
Tax Credits
R&D	(566)			(8.1)	%
Changes in valuation allowances	3,480			49.5	%
Nontaxable or nondeductible items
Share-based compensation	1,642			23.4	%
Other nontaxable or nondeductible items	254			3.6	%
Other adjustments
Other	(852)			(12.1)	%
Change in unrecognized tax benefits	(5,708)			(81.2)	%
Foreign tax effects:
Brazil
Statutory income tax rate differential	2,949			42.0	%
Other	(198)			(2.8)	%
China
Withholding taxes	4,100			58.3	%
R&D deduction	(1,402)			(19.9)	%
Other	266			3.8	%
France
Non-deductible impairment	3,197			45.5	%
Other	(229)			(3.3)	%
Germany
Non-deductible impairment	5,257			74.8	%
Other	(835)			(11.9)	%
Korea
Withholding taxes	1,760			25.0	%
Malta
Statutory income tax rate differential	(3,166)			(45.0)	%
Other	1,009			14.4	%
Mexico
Statutory income tax rate differential	1,896			27.0	%
Other	599			8.5	%
Netherlands
Other	2,060			29.3	%
Spain
Non-deductible impairment	1,605			22.8	%
Other	141			2.0	%
United Kingdom
Non-deductible impairment	2,451			34.9	%
Other	3			—	%
Other foreign jurisdictions	5,801			82.5	%

Effective Tax Rate	$	24,607		350.1	%

(1) During the year ended December 31, 2025, state taxes in Indiana, Pennsylvania, and Michigan comprised greater than 50% of the tax effect in this category.

The following is a reconciliation of income taxes at the Federal statutory rate with income taxes recorded by the Company for the years ended December 31, 2024 and 2023:


	2024		2023
Income tax provision at the Federal statutory tax rate	$	32,562	$	32,156
Unremitted earnings	(30)		1,211
Tax law changes / reform	(37)		47
U.S. tax on foreign operations	9,625		9,014

Foreign derived intangible income	(1,336)		(1,147)

Withholding taxes	8,418		11,193
FTC's	(6,898)		(3,432)
Share-based compensation	2,345		1,814
Foreign tax rate differential	1,315		4,731
Research and development credit	(1,902)		(2,000)
Audit settlements	—		456
Uncertain tax positions	(2,372)		(598)
State income tax provisions, net	1,905		2,158
Non-deductible expenses	341		416
Intercompany transfer of intangible assets	2,295		(584)
Goodwill impairment	—		—
Provision to return and other adjustments	2,655		(930)
Miscellaneous items, net	414		1,080
Taxes on income before equity in net income of associated companies	$	49,300	$	55,585

Schedule of Reconciliation of Uncertain Tax Positions

A reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended December 31, 2025, 2024 and 2023, respectively, is as follows:


	2025		2024		2023
Unrecognized tax benefits as of January 1	$	13,949	$	15,659	$	16,340
Decrease in unrecognized tax benefits taken in prior periods	(1,351)		(88)		(147)
Increase in unrecognized tax benefits taken in current period	4,011		2,684		1,799
Decrease in unrecognized tax benefits due to lapse of statute of limitations	(4,954)		(3,559)		(2,736)
Decrease in unrecognized tax benefits due to audit settlements	(506)		—		—

Increase (decrease) due to foreign exchange rates	1,230		(747)		403
Unrecognized tax benefits as of December 31	$	12,379	$	13,949	$	15,659

Schedule of Income Tax Examinations

Tax years that remain subject to examination by major tax jurisdictions are shown in the table below:


Jurisdiction						Open Years
Brazil						2020-2025
China						2020-2025
Germany						2019-2025
India						2020-2025
Italy						2019-2025
Mexico						2020-2025
Netherlands						2020-2025
Spain						2019-2025
U.S. Federal and State						2020-2025
United Kingdom						2021-2025

Other Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Liabilities

Other accrued liabilities as of December 31, 2025 and 2024 were as follows:


	2025		2024
Non-income taxes	$	29,345	$	25,455
Current income taxes payable (See Note 10)	10,929		12,772
Selling expenses and freight accruals	9,848		10,716
Short-term lease liabilities (See Note 6)	12,536		10,619
Professional fees, legal, and acquisition-related accruals	7,009		5,340
Customer advances and sales return reserves	4,833		3,855
Accrued insurance	3,851		6,041
Accrued environmental reserves (See Note 25)	1,516		1,235
Accrued interest (See Note 19)	1,312		1,289
Accrued rent and facilities	956		1,129
Multiemployer plan withdrawal charge (See Note 9)	901		—
Accrued non-pension benefits	678		833
Deferred acquisition payment (See Note 2)	538		—

Earnout liability (See Note 2)	—		1,160
Other	845		224
Total other accrued liabilities	$	85,097	$	80,668

Income Taxes - Schedule of Payments for Income Taxes, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. Federal	$ 7,163
U.S. State	2,090
Foreign
Total income taxes paid, net	59,711	$ 69,000	$ 68,600
Brazil
Foreign
Foreign	11,592
China
Foreign
Foreign	15,040
India
Foreign
Foreign	3,422
Mexico
Foreign
Foreign	9,149
Other
Foreign
Foreign	$ 11,255

Pension and Other Postretirement Benefits - Schedule of Net Periodic Benefit Cost and Changes in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Net periodic benefit costs	$ (4,132)	$ (4,460)	$ (2,079)
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	436	417	427
Interest cost	9,473	9,489	9,932
Expected return on plan assets	(8,247)	(8,133)	(8,070)
Settlement gain	(136)	0
Curtailment gain	0	(19)	(198)
Actuarial loss amortization	595	505	410
Prior service credit amortization	24	26	34
Net periodic benefit costs	2,145	2,285	2,535
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net loss (gain) arising during the period	(435)	354	9,003
Settlement gain (loss)	130	(24)	(23)
Prior service cost			(15)
Actuarial gain (loss) amortization	(592)	(481)	(480)
Curtailment recognition	(21)	(27)	(28)
Effect of exchange rates on amounts included in AOCI	2,105	(908)	560
Total recognized in other comprehensive loss (income)	1,187	(1,086)	9,017
Total recognized in net periodic benefit cost and other comprehensive loss (income)	3,332	1,200	11,552
Foreign \| Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	436	417	399
Interest cost	5,902	5,817	6,083
Expected return on plan assets	(5,537)	(5,571)	(5,271)
Settlement gain	(136)	0
Curtailment gain	0	(19)	(213)
Actuarial loss amortization	572	481	388
Prior service credit amortization	24	27	28
Net periodic benefit costs	1,261	1,152	1,414
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net loss (gain) arising during the period	266	1,985	8,605
Settlement gain (loss)	130	0	0
Prior service cost			0
Actuarial gain (loss) amortization	(566)	(481)	(388)
Curtailment recognition	(24)	(27)	(28)
Effect of exchange rates on amounts included in AOCI	2,105	(908)	560
Total recognized in other comprehensive loss (income)	1,911	569	8,749
Total recognized in net periodic benefit cost and other comprehensive loss (income)	3,172	1,721	10,163
U.S. \| Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0	0	28
Interest cost	3,571	3,672	3,849
Expected return on plan assets	(2,710)	(2,562)	(2,799)
Settlement gain	0	0
Curtailment gain	0	0	15
Actuarial loss amortization	23	24	22
Prior service credit amortization	0	(1)	6
Net periodic benefit costs	884	1,133	1,121
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net loss (gain) arising during the period	(701)	(1,631)	398
Settlement gain (loss)	0	(24)	(23)
Prior service cost			(15)
Actuarial gain (loss) amortization	(26)	0	(92)
Curtailment recognition	3	0	0
Effect of exchange rates on amounts included in AOCI	0	0	0
Total recognized in other comprehensive loss (income)	(724)	(1,655)	268
Total recognized in net periodic benefit cost and other comprehensive loss (income)	160	(521)	1,389
U.S. \| Other Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0	0
Interest cost	61	61	69
Actuarial loss amortization	(94)	(102)	(128)
Prior service credit amortization	0	0	(16)
Net periodic benefit costs	(33)	(41)	(75)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net loss (gain) arising during the period	210	(61)	(150)
Prior service cost	0	0	0
Prior service credit	0	0	16
Actuarial gain (loss) amortization	94	102	127
Total recognized in other comprehensive loss (income)	304	41	(7)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$ 271	$ 0	$ (82)

Business Combinations

12 Months Ended

Dec. 31, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Business Combinations

Dipsol

In April 2025, the Company acquired 100% of the outstanding equity interests of Dipsol for approximately $185.6 million (27.7 billion JPY), which included approximately $30.1 million (4.5 billion JPY) of acquired cash for a net purchase price of approximately $155.5 million (23.2 billion JPY). In July 2025, the Company satisfied all routine and customary post-closing conditions and finalized the purchase price with no adjustments. The Company funded the acquisition purchase price with borrowings under its existing credit facility. In connection with the acquisition of Dipsol, the Company entered into foreign currency forward contracts, which resulted in a $187.0 million cash payment and a $1.4 million foreign currency loss recognized during the year ended December 31, 2025. Dipsol is headquartered in Japan and is a leading supplier of surface treatment and plating solutions and services primarily for the automotive and other industrial applications end markets. Dipsol has operations in several countries, and these operations are reported within the Company’s respective Americas, EMEA, and Asia/Pacific segments. This acquisition expands the Company’s advanced solutions businesses in attractive end markets with solid growth characteristics. Dipsol also provides significant cross-selling opportunities and enhances the Company’s ability to meet the needs of our customers across the globe.

The following table presents the preliminary estimated fair values of Dipsol assets acquired and liabilities assumed as of the acquisition date:


Dipsol Assets Acquired and Liabilities Assumed Dollars in thousands	Estimated Fair Value (1)
Fair value of assets acquired
Cash and cash equivalents	$	30,084
Accounts receivable	16,481
Inventories	17,962
Prepaid expenses and other current assets	1,231
Property, plant and equipment	39,450
Right-of-use lease assets	2,534
Other intangible assets	55,000
Investments in associated companies	5,096
Deferred tax assets	989
Other non-current assets	4,165
Total Assets Acquired	$	172,992
Fair value of liabilities assumed
Accounts payable	$	6,763
Accrued compensation	1,528
Other accrued liabilities	2,415
Long-term lease liabilities	1,446
Deferred income tax liabilities	25,836
Total Liabilities Assumed	$	37,988
Noncontrolling interest	(2,451)
Goodwill	53,059
Total Consideration	$	185,612

(1) The Company recorded approximately $0.2 million of net measurement period adjustments during the year ended December 31, 2025 to reflect changes in net working capital and tax balances. All measurement period adjustments were offset against goodwill.

As of December 31, 2025, the allocation of the purchase price has not been finalized and the one-year measurement period has not ended. Further adjustments may be necessary, primarily for working capital adjustments and tax balances, as a result of the Company’s ongoing assessment of additional information related to the fair value of assets acquired and liabilities assumed.

The Company allocated $55.0 million of the purchase price to intangible assets across the Americas, EMEA, and Asia/Pacific segments. Customer relationships, product technologies, and trademarks will be amortized over 14 years, 8 years, and 13 years, respectively.

The following table presents the intangible assets recognized for each reportable segment:


	Americas		EMEA		Asia/Pacific		Total
Customer Relationships	$	3,500	$	200	$	26,300	$	30,000
Product Technologies	—		—		18,000		18,000
Trademarks	—		—		7,000		7,000
Total Intangibles	$	3,500	$	200	$	51,300	$	55,000

The Company recognized $53.1 million of goodwill, which is comprised of $46.9 million in the Asia/Pacific segment, $5.8 million in the Americas segment, and $0.4 million in the EMEA segment. The goodwill is not deductible for tax purposes. The goodwill is primarily attributable to expected synergies.

Total sales included in the Consolidated Statement of Operations for the year ended December 31, 2025 was $62.7 million. Total loss before taxes included in the Consolidated Statement of Operations for the year ended December 31, 2025 was $5.4 million, which includes $6.0 million amortization of the fair value step-up in inventories and $4.9 million depreciation expense recorded in connection with the fair value step-up of property, plant, and equipment and amortization expense recorded for its definite-lived intangible assets.

Natech

In April 2025, the Company acquired 100% of the outstanding equity interests of Natech, Ltd., (“Natech”) for approximately $6.5 million, which includes an initial cash payment of $6.0 million and a deferred payment of $0.5 million, subject to routine and customary post-closing adjustments, including an adjustment for working capital. Assets acquired included cash and cash equivalents of $1.5 million. Natech is based in the United Kingdom and is a manufacturer of surface treatment chemicals for a variety of industrial applications. Natech is reported as part of the EMEA reportable segment. This acquisition strengthens Quaker Houghton’s overall surface treatment product and application capabilities within Europe. The Company allocated $2.1 million of the purchase price to intangible assets and recognized $2.6 million of goodwill in the EMEA segment, none of which is deductible for tax purposes. The goodwill is primarily attributable to expected growth synergies. During the third quarter of 2025, the Company settled the working capital adjustment for an immaterial amount. As of December 31, 2025, the allocation of the purchase price has been finalized.

CSI

In February 2025, the Company acquired 100% of the outstanding equity interests of Chemical Solutions & Innovations (Pty) Ltd. (“CSI”), for approximately $3.9 million, subject to routine and customary post-closing adjustments, including an adjustment for working capital. CSI is based in South Africa and is a supplier of metalworking fluids and lubricants to the South African market. CSI is reported as part of the EMEA reportable segment. This acquisition strengthens Quaker Houghton’s position in South Africa and expands the Company’s presence in that region. The Company allocated $1.4 million of the purchase price to intangible assets and recognized $1.7 million of goodwill in the EMEA segment, none of which is deductible for tax purposes. The goodwill is primarily attributable to expected growth synergies. During the third quarter of 2025, the Company settled the working capital adjustment for an immaterial amount. As of December 31, 2025, the allocation of the purchase price has been finalized.

Previous Acquisitions

In July 2024, the Company acquired 100% of the outstanding equity interests of the Sutai Group (“Sutai”), for approximately $16.2 million, including an initial cash payment of $14.6 million, subject to routine and customary post-closing adjustments related to working capital and net indebtedness levels, as well as earn-out provisions with an initial estimated payout of $1.6 million related to the finalization of 2024 and 2025 earnings. Assets acquired included cash and cash equivalents of $5.5 million. The Company recorded incremental income of $0.8 million during the year ended December 31, 2025 relating to adjustments to these earnout provisions in Other (expense) income, net on the Consolidated Statements of Operations. As of December 31, 2025, the Company does not have any remaining earnout liabilities recorded on its Consolidated Balance Sheets. Sutai is based in Japan and provides impregnation treatment products and services to the automotive and other industries. Sutai is reported as part of the Asia/Pacific reportable segment. This acquisition strengthens Quaker Houghton’s technology portfolio, enabling the Company to better support and optimize production processes for customers across the Japanese, Asia Pacific and global markets. The Company allocated $3.1 million of the purchase price to intangible assets and recognized $5.5 million of goodwill in the Asia/Pacific segment, none of which is deductible for tax purposes. The goodwill is primarily attributable to expected synergies. During the first quarter of 2025, the Company settled the working capital adjustment for an immaterial amount which impacted the residual goodwill recorded. As of December 31, 2025, the allocation of the purchase price has been finalized.

During February 2024, the Company acquired 100% of the outstanding equity interests of I.K.V. Tribologie IKVT and its subsidiaries (“IKV”) for $35.2 million, including an initial cash payment of $29.7 million, subject to routine and customary post-closing adjustments related to working capital and net indebtedness levels as well as earn-out provisions related to the finalization of 2023 earnings. Assets acquired included approximately $4.8 million of cash and cash equivalents. IKV, which is part of the Company’s EMEA segment, specializes in high-performance lubricants and greases, including original equipment manufacturer first-fill greases that are primarily used in the automotive, aerospace, electronics and other industrial markets. The acquisition of IKV strengthens the Company’s position in first-fill greases. The Company allocated $15.0 million of the purchase price to intangible assets, comprised of approximately $11.1 million of customer relationships to be amortized over 16 years; $3.2 million of product technologies to be amortized over 14 years; and $0.7 million of trademarks to be amortized over 5 years. In addition, the Company recognized $16.4 million of goodwill in the EMEA segment, none of which is deductible for tax purposes. The goodwill is primarily attributable to expected cost and growth synergies. In July 2024, the 2023 earnings were finalized and the Company made a payment of $5.5 million in connection with the post-closing adjustments and earn-out provision. As of December 31, 2025, the allocation of the purchase price has been finalized.

The results of operations of Dipsol, Natech, CSI, Sutai and IKV subsequent to the acquisition dates are included in the Consolidated Statements of Operations for the year ended December 31, 2025.

During the year ended December 31, 2025, the Company recognized $12.0 million of acquisition-related expenses including legal, financial, consulting and other costs, compared to $1.9 million during the year ended December 31, 2024. There were no acquisition-related expenses recognized during the year ended December 31, 2023. These costs are included in Selling, general and administrative expenses (“SG&A”) in the Consolidated Statements of Operations.

Certain pro forma and other information is not presented, as the operations of the acquired assets and businesses are not considered material to the overall operations of the Company for the periods presented.

- Definition

The entire disclosure for business combination.

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+ Details

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Leases (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Schedule of Lease Cost

The components of the Company’s lease expense for the years ended December 31, 2025, 2024 and 2023 are as follows:


	December 31, 2025		December 31, 2024		December 31, 2023
Operating lease expense	$	16,738	$	15,096	$	14,981
Short-term lease expense	572		807		760

Supplemental cash flow information related to the Company’s leases is as follows:


	December 31, 2025		December 31, 2024		December 31, 2023
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	16,508	$	14,923	$	16,020

Non-cash lease liabilities activity
Leased right-of-use assets obtained in exchange for new operating lease liabilities	17,561		9,792		10,044

Supplemental balance sheet information related to the Company’s leases is as follows:


	December 31, 2025			December 31, 2024
Right-of-use lease assets	$	38,737		$	34,120

Other accrued liabilities	12,536			10,619
Long-term lease liabilities	22,759			20,028
Total operating lease liabilities	$	35,295		$	30,647

Weighted average remaining lease term (years)	5.7			5.0
Weighted average discount rate	6.58		%	5.63		%

Schedule of Maturities of Operating Lease Liabilities

Maturities of operating lease liabilities as of December 31, 2025 were as follows:



For the year ended December 31, 2026	$	14,135
For the year ended December 31, 2027	9,483
For the year ended December 31, 2028	6,599
For the year ended December 31, 2029	3,706
For the year ended December 31, 2030	2,296
For the year ended December 31, 2031 and beyond	8,051
Total lease payments	44,270
Less: imputed interest	(8,975)
Present value of lease liabilities (1)	$	35,295

(1) The $79.7 million of future lease commitments for the office and laboratory lease expected to commence during 2026 were not included in the lease liabilities balance as of December 31, 2025.

Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net (loss) income attributable to Quaker Chemical Corporation	$ (2,488)	$ 116,644	$ 112,748
Less: loss (income) allocated to participating securities	20	(375)	(554)
Net (loss) income available to common shareholders	$ (2,468)	$ 116,269	$ 112,194
Basic weighted average common shares outstanding (in shares)	17,472,907	17,850,462	17,892,461
Effect of dilutive securities (in shares)	0	19,605	22,348
Diluted weighted average common shares outstanding (in shares)	17,472,907	17,870,067	17,914,809
Diluted (loss) earnings per common share (in dollars per share)	$ (0.14)	$ 6.51	$ 6.26

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

+ References + Details

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Pension and other postretirement benefits	$ 4,426	$ 5,472
Allowance for credit losses	2,232	1,895
Insurance and litigation reserves	614	565
Performance incentives	5,291	5,582
Equity-based compensation	3,634	2,891
Prepaid expense	458	426
Operating loss carryforward	32,065	24,702
Foreign tax credit and other credits	23,516	19,516
Interest	22,786	16,423
Restructuring reserves	2,230	158
Right-of-use lease assets	8,790	7,629
Inventory reserves	3,596	2,423
Research and development	14,036	12,608
Other	3,242	1,261
Total deferred tax assets, gross	126,916	101,551
Valuation allowance	(33,376)	(27,993)	$ (24,182)	$ (11,730)
Total deferred tax assets, net	93,540	73,558
Depreciation	14,095	9,814
Intangibles	185,501	170,309
Lease liabilities	9,661	8,575
Outside basis in equity investment	4,500	6,080
Unremitted earnings	8,469	8,392
Total net deferred tax liabilities	222,226	203,170
Total net deferred tax liabilities	$ (128,686)	$ (129,612)

Accounts Receivable and Allowance for Credit Losses - Schedule of Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 13,587	$ 13,302	$ 13,527
Changes to Costs and Expenses	737	2,120	1,327
Write-Offs Charged to Allowance	(575)	(1,215)	(961)
Exchange Rate Changes and Other Adjustments	1,192	(620)	(591)
Balance at End of Period	$ 14,941	$ 13,587	$ 13,302

Debt -Schedule of Debt Related Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt related expenses included within Interest expense:
Interest expense	$ 42,634	$ 43,223	$ 53,582
Amortization of debt issuance costs	1,413	1,413	1,413
Total	$ 44,047	$ 44,636	$ 54,995

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the early 1990s, the Company identified certain soil and groundwater contamination at AC Products, Inc. (“ACP”), a wholly owned subsidiary. In voluntary coordination with the Santa Ana California Regional Water Quality Board, ACP has been remediating the contamination, the principal contaminant of which is perchloroethylene (“PERC”). In 2004, the Orange County Water District (“OCWD”) filed a civil complaint against ACP and other parties seeking to recover compensatory and other damages related to the investigation and remediation of the contamination in the groundwater. Pursuant to a settlement agreement with OCWD, ACP agreed, among other things, to operate the two groundwater treatment systems to hydraulically contain groundwater contamination emanating from ACP’s site until the concentrations of PERC released by ACP fell below the current Federal maximum contaminant level for four consecutive quarterly sampling events. In 2014, ACP ceased operation at one of its two groundwater treatment systems, as it had met the above condition for closure. In 2020, the Santa Ana Regional Water Quality Control Board asked that ACP conduct periodic indoor and outdoor soil vapor testing on and near the ACP site to confirm that ACP continues to meet the applicable local standards. ACP has performed such testing program work with an additional round of testing done in 2025. It is expected that additional testing may occur in 2026. As of December 31, 2025, ACP believes it has met the conditions for closure of the remaining groundwater treatment system but continues to operate this system while in discussions with the relevant authorities. The Company’s Sao Paulo, Brazil site was required under Brazilian environmental, health and safety regulations to perform an environmental assessment as part of a permit renewal process. Initial investigations identified soil and ground water contamination in select areas of the site. The site has conducted a multi-year soil and groundwater investigation and corresponding risk assessments based on the result of the investigations. In 2017, the site had to submit a new 5-year permit renewal request and was asked to complete additional investigations to further delineate the site based on review of the technical data by the local regulatory agency, Companhia Ambiental do Estado de São Paulo (“CETESB”). Based on review of the updated investigation data, CETESB issued a Technical Opinion regarding the investigation and remedial actions taken to date. The site developed an action plan and submitted it to CETESB in 2018 based on CETESB requirements. The site intervention plan primarily requires the site, amongst other actions, to conduct periodic monitoring for methane in soil vapors, source zone delineation, groundwater plume delineation, bedrock aquifer assessment, update the human health risk assessment, develop a current site conceptual model and conduct a remedial feasibility study and provide a revised intervention plan. In 2020, the site submitted a report on the activities completed including the revised site conceptual model and results of the remedial feasibility study and recommended remedial strategy for the site. The site believes it will achieve the remedial objectives in June 2027, at which time a request for closure of the treatment system will be submitted. The Company is also party to other environmental matters related to certain domestic and foreign properties. These environmental matters primarily require the Company to perform ongoing monitoring and maintenance at each of the applicable sites. During the year ended December 31, 2025, there have been no significant changes to the facts or circumstances of these matters. The Company had accrued obligations of $3.4 million and $3.6 million as of December 31, 2025 and 2024, respectively, for these environmental matters. These obligations are included in other accrued liabilities and other non-current liabilities on the Company’s Consolidated Balance Sheets. These accrued amounts are inclusive of the Brazilian environmental matter discussed below. Other environmental matters include participation in certain payments in connection with four currently active environmental consent orders related to certain hazardous waste cleanup activities under the U.S. Federal Superfund statute. The Company has been designated a potentially responsible party (“PRP”) by the Environmental Protection Agency along with other PRPs depending on the site, and has other obligations to perform cleanup activities at certain other foreign subsidiaries. These environmental matters primarily require the Company to perform long-term monitoring as well as operating and maintenance at each of the applicable sites. The Company believes that it has made adequate accruals for costs associated with other environmental matters of which it is aware. Approximately $0.5 million and $0.6 million were accrued as of December 31, 2025 and 2024, respectively, to provide for such anticipated future environmental assessments and remediation costs. The Company previously disclosed in its 2024 Form 10-K that one of its North American production facilities experienced an electrical fire in 2021 that resulted in property damage and the temporary shutdown of production. The Company and its insurance carrier reviewed the impact of the electrical fire on the production facility’s operations as it relates to a potential business interruption insurance claim. In July 2024, the Company and its insurance carrier settled this claim for $1.0 million. The Company is party to other litigation which management currently believes will not have a material adverse effect on the Company’s results of operations, cash flows or financial condition. In addition, the Company has an immaterial amount of contractual purchase obligations.

Accumulated Other Comprehensive Loss - Schedule of AOCI Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,354,183	$ 1,384,922	$ 1,278,585
Ending balance	1,376,499	1,354,183	1,384,922
Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(192,841)	(115,417)	(132,161)
Other comprehensive income (loss) before reclassifications	90,102	(77,424)	16,744
Amounts reclassified from AOCI	0	0	0
Related tax amounts	(1,958)	0	0
Ending balance	(104,697)	(192,841)	(115,417)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(10,313)	(10,738)	(4,595)
Other comprehensive income (loss) before reclassifications	(1,588)	250	(7,702)
Amounts reclassified from AOCI	363	265	(464)
Related tax amounts	304	(90)	2,023
Ending balance	(11,234)	(10,313)	(10,738)
Unrealized Gain (Loss) in Available-for- Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	287	333	(1,484)
Other comprehensive income (loss) before reclassifications	(51)	(44)	1,753
Amounts reclassified from AOCI	13	(14)	547
Related tax amounts	8	12	(483)
Ending balance	257	287	333
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,248	1,407	0
Other comprehensive income (loss) before reclassifications	(1,604)	(207)	1,828
Amounts reclassified from AOCI	0	0	0
Related tax amounts	369	48	(421)
Ending balance	13	1,248	1,407
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(201,619)	(124,415)	(138,240)
Other comprehensive income (loss) before reclassifications	86,859	(77,425)	12,623
Amounts reclassified from AOCI	376	251	83
Related tax amounts	(1,277)	(30)	1,119
Ending balance	$ (115,661)	$ (201,619)	$ (124,415)

Leases - Narrative (Details) - USD ($)	12 Months Ended
Leases - Narrative (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Variable lease, cost	$ 0	$ 0	$ 0
Sublease income	0	$ 0	$ 0
Total lease commitment	$ 79,700,000
Facilities Vehicles and Machinery and Equipment \| Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	9 years
Land \| Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	89 years

Other Non-Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Other Liabilities Disclosure [Abstract]

Other Noncurrent Liabilities

Other non-current liabilities as of December 31, 2025 and 2024 were as follows:


	2025		2024
Uncertain tax positions, including interest and penalties (See Note 10)	$	14,256	$	17,257

Environmental reserves (See Note 25)	2,512		2,941
Net investment hedge (See Note 24)	1,541		—
Deferred and other long-term compensation	3,011		2,833


Other	872		1,414
Total other non-current liabilities	$	22,192	$	24,445

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities
Net (loss) income	$ (2,401)	$ 116,729	$ 112,872
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	93,453	84,119	81,987
Equity in undistributed earnings of associated companies, net of dividends	(6,648)	(2,733)	(11,149)
Deferred income taxes	(30,428)	(10,033)	(11,442)
Restructuring and related charges	35,130	6,530	7,588
Share-based compensation	13,611	14,991	14,605
Gain on disposal of property, plant, equipment and other assets	(2,204)	(810)	(1,307)
Inventory step-up amortization	6,022	0	0
Impairment charges	88,840	0	0
Uncertain tax positions (non-deferred portion)	(5,708)	(2,372)	(644)
Pension and other postretirement benefits	(4,132)	(4,460)	(2,079)
Other adjustments	(5,564)	6,280	7,124
Increase (decrease) in change in operating assets and liabilities, net of acquisitions
Accounts receivable	24,232	24,975	32,169
Inventories	(12,239)	(3,244)	49,751
Prepaid expenses and other assets	3,069	(6,242)	(21)
Accrued restructuring	(26,598)	(7,595)	(9,786)
Accounts payable and accrued liabilities	(30,268)	(8,637)	5,937
Estimated taxes on (loss) income	(1,714)	(2,920)	3,415
Net cash provided by operating activities	136,453	204,578	279,020
Cash flows from investing activities
Investments in property, plant and equipment	(55,856)	(41,794)	(38,800)
Payments related to acquisitions, net of cash acquired	(164,209)	(39,302)	0
Proceeds from disposition of assets	2,995	4,676	11,179
Other investing activities	2,951	0	0
Net cash used in investing activities	(214,119)	(76,420)	(27,621)
Cash flows from financing activities
Payments of long-term debt	(34,722)	(57,221)	(38,932)
Borrowings (payments) on revolving credit facilities, net	174,242	17,916	(164,769)
(Payments) borrowings on other debt, net	(386)	1,441	(506)
Dividends paid	(34,393)	(33,170)	(31,650)
Shares purchased under share repurchase program	(41,521)	(49,247)	0
Other stock related activity	(1,387)	(2,383)	(2,749)
Net cash provided by (used in) financing activities	61,833	(122,664)	(238,606)
Effect of foreign exchange rate changes on cash	6,782	(11,141)	771
Net (decrease) increase in cash and cash equivalents	(9,051)	(5,647)	13,564
Cash and cash equivalents at the beginning of the period	188,880	194,527	180,963
Cash and cash equivalents at the end of the period	179,829	188,880	194,527
Supplemental cash flow disclosures:
Interest	42,788	44,536	54,892
Non-cash activities:
Accrued purchases of property, plant and equipment, net	$ 8,987	$ 12,654	$ 2,975

Accumulated Other Comprehensive Loss

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Accumulated Other Comprehensive Loss

The following table shows the reclassifications from and resulting balances of AOCI for the years ended December 31, 2025, 2024 and 2023:


	Currency Translation Adjustments(1)		Defined Benefit Pension Plans		Unrealized Gain (Loss) in Available-for- Sale Securities		Derivative Instruments		Total
Balance as of December 31, 2022	$	(132,161)	$	(4,595)	$	(1,484)	$	—	$	(138,240)
Other comprehensive income (loss) before reclassifications	16,744		(7,702)		1,753		1,828		12,623
Amounts reclassified from AOCI	—		(464)		547		—		83
Related tax amounts	—		2,023		(483)		(421)		1,119
Balance as of December 31, 2023	(115,417)		(10,738)		333		1,407		(124,415)
Other comprehensive (loss) income before reclassifications	(77,424)		250		(44)		(207)		(77,425)
Amounts reclassified from AOCI	—		265		(14)		—		251
Related tax amounts	—		(90)		12		48		(30)
Balance as of December 31, 2024	(192,841)		(10,313)		287		1,248		(201,619)
Other comprehensive income (loss) before reclassifications	90,102		(1,588)		(51)		(1,604)		86,859
Amounts reclassified from AOCI	—		363		13		—		376
Related tax amounts	(1,958)		304		8		369		(1,277)
Balance as of December 31, 2025	$	(104,697)	$	(11,234)	$	257	$	13	$	(115,661)

(1) Includes mark-to-market impacts associated with net investment hedges. See Note 24, Hedging Activities, for more information.

All reclassifications related to Unrealized (loss) gain on available-for-sale securities relate to the Company’s equity interest in a captive insurance company and are recorded in Equity in net income of associated companies. The amounts reported in Other comprehensive income (loss) for non-controlling interest are related to currency translation adjustments.

Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 27,800
Mexican Peso
Derivative [Line Items]
Derivative, notional amount	12,500
Japanese Yen
Derivative [Line Items]
Derivative, notional amount	$ 15,300

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Income Taxes - Schedule of Reconciliation of Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits as of January 1	$ 13,949	$ 15,659	$ 16,340
Decrease in unrecognized tax benefits taken in prior periods	(1,351)	(88)	(147)
Increase in unrecognized tax benefits taken in current period	4,011	2,684	1,799
Decrease in unrecognized tax benefits due to lapse of statute of limitations	(4,954)	(3,559)	(2,736)
Decrease in unrecognized tax benefits due to audit settlements	(506)	0	0
Increase due to foreign exchange rates	1,230		403
Decrease due to foreign exchange rates		(747)
Unrecognized tax benefits as of December 31	$ 12,379	$ 13,949	$ 15,659

Restructuring and Related Activities - Schedule of Restructuring and Related Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) position	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated \| position	440
Restructuring Reserve [Roll Forward]
Asset-related charges	$ 35,130	$ 6,530	$ 7,588
Real estate held-for-sale	1,200
Gain (loss) on disposition of other assets	2,200	400	1,400
Restructuring Programs
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance	2,297	3,350
Severance costs	30,292	3,259
Asset-related charges	4,838	3,271
Cash payments	(26,598)	(7,595)
Reductions against the reserve	(2,620)
Currency translation adjustments	142	12
Accrued restructuring, ending balance	$ 8,351	$ 2,297	$ 3,350

Pension and Other Postretirement Benefits - Schedule of Asset Allocations (Details) - Pension Benefits	Dec. 31, 2025	Dec. 31, 2024
U.S.
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
U.S. \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	20.00%
Actual Plan Asset Allocations	21.00%	27.00%
U.S. \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	80.00%
Actual Plan Asset Allocations	79.00%	71.00%
U.S. \| Other
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	0.00%
Actual Plan Asset Allocations	0.00%	2.00%
Foreign
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
Foreign \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	17.00%
Actual Plan Asset Allocations	21.00%	18.00%
Foreign \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	68.00%
Actual Plan Asset Allocations	61.00%	62.00%
Foreign \| Other
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	15.00%
Actual Plan Asset Allocations	18.00%	20.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (k)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)(iv)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-7

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (m)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

+ Details

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 179,829	$ 188,880
Accounts receivable, net	417,157	400,126
Inventories	265,776	227,472
Prepaid expenses and other current assets	58,428	59,939
Total current assets	921,190	876,417
Property, plant and equipment, net	313,423	229,532
Right-of-use lease assets	38,737	34,120
Goodwill	501,720	518,894
Other intangible assets, net	873,540	827,098
Investments in associated companies	106,915	98,012
Deferred tax assets	12,128	9,216
Other non-current assets	30,283	17,360
Total assets	2,797,936	2,610,649
Current liabilities
Short-term borrowings and current portion of long-term debt	35,657	37,554
Accounts payable	198,929	198,137
Dividends payable	8,804	8,572
Accrued compensation	41,192	50,212
Accrued restructuring	8,351	2,297
Accrued pension and postretirement benefits	2,126	2,328
Other accrued liabilities	85,097	80,668
Total current liabilities	380,156	379,768
Long-term debt	834,901	669,614
Long-term lease liabilities	22,759	20,028
Deferred tax liabilities	140,814	138,828
Non-current accrued pension and postretirement benefits	20,615	23,783
Other non-current liabilities	22,192	24,445
Total liabilities	1,421,437	1,256,466
Commitments and contingencies (Note 25)
Equity
Common stock, $1 par value; authorized 30,000,000 shares; issued and outstanding 2025 – 17,331,779 shares; 2024 – 17,673,607 shares	17,332	17,674
Capital in excess of par value	874,826	903,781
Retained earnings	596,616	633,731
Accumulated other comprehensive loss	(115,661)	(201,619)
Total Quaker shareholders’ equity	1,373,113	1,353,567
Noncontrolling interest	3,386	616
Total equity	1,376,499	1,354,183
Total liabilities and equity	$ 2,797,936	$ 2,610,649

Other Non-Current Liabilities

12 Months Ended

Dec. 31, 2025

Other Liabilities Disclosure [Abstract]

Other Non-Current Liabilities

Other non-current liabilities as of December 31, 2025 and 2024 were as follows:


	2025		2024
Uncertain tax positions, including interest and penalties (See Note 10)	$	14,256	$	17,257

Environmental reserves (See Note 25)	2,512		2,941
Net investment hedge (See Note 24)	1,541		—
Deferred and other long-term compensation	3,011		2,833


Other	872		1,414
Total other non-current liabilities	$	22,192	$	24,445

Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised options, intrinsic value		$ 0.1	$ 0.1	$ 3.6
Director stock ownership plan maximum number of shares authorized under plan		75,000
Director stock ownership percentage threshold		500.00%
Director stock ownership plan stock (in percent)		75.00%
Director stock ownership plan cash (in percent)		25.00%
Total director stock ownership plan (in percent)		100.00%
Director retainer annual fee		$ 0.1
Common stock, shares authorized (in shares)	30,000,000	30,000,000	30,000,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Common stock, shares outstanding (in shares)	17,673,607	17,331,779	17,673,607
Common stock, shares issued (in shares)	17,673,607	17,331,779	17,673,607
Preferred stock, shares authorized (in shares)		10,000,000
Preferred stock, par value (in dollars per share)		$ 1.00
Shares issued for ESPP (in shares)		0
Equity Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		37,768
Forfeited (in shares)		2,617
Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased and retired during period (in shares)		364,797	312,997
2024 Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount		$ 150.0
Stock repurchase program, remaining authorized repurchase amount		59.2
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 0.1
Weighted average remaining period		2 months 12 days
Granted (in shares)		0
Forfeited (in shares)		2,705
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 7.2
Weighted average remaining period		1 year 4 months 24 days
Granted (in shares)	9,820	84,479
Expected term (years)		3 years
Surrendered (in shares)		12,182
Forfeited (in shares)		10,059
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining period		1 year 10 months 24 days
Granted (in shares)		56,347
Vesting shares target, lower (in percent)		0.00%
Vesting shares target, upper (in percent)		200.00%
Expected term (years)		3 years	3 years	3 years
Unrecognized compensation expense		$ 6.0
Forfeited (in shares)		7,967
Minimum \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		1 year
Minimum \| Share-based Payment Arrangement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		2 years
Minimum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		1 year
Award vesting rights (in percent)	75.00%
Maximum \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		3 years
Options, maximum exercisable life		7 years
Maximum \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		3 years
Maximum \| Share-based Payment Arrangement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period		5 years
Maximum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	3 years	3 years
Award vesting rights (in percent)	125.00%

Equity

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Equity

Share-based Compensation

The Company recognized the following share-based compensation expense in its Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023





Before-tax share-based compensation expense	$	13,611	$	14,991	$	14,605
Income tax benefit	(1,661)		(2,222)		(2,742)
After-tax share-based compensation expense	$	11,950	$	12,769	$	11,863

Before-tax share-based compensation expense is primarily included in SG&A in the Consolidated Statements of Operations. No cost was capitalized during the years ended December 31, 2025, 2024 and 2023.

Stock Options

Stock options granted under the LTIP program are subject to time vesting and generally become exercisable within three years after the date of the grant for a period of time determined by the Company, but not to exceed seven years from the date of grant. The Company has not granted stock options since fiscal year 2022. Share-based compensation for stock options is recognized using the graded vesting method over the vesting periods.

Stock option activity under all plans is as follows:


	Number of Options	Weighted Average Exercise Price (per option)		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Options outstanding as of January 1, 2024	58,612	$	219.13

Options exercised	2,587	136.64
Options expired	5,661	189.17
Options outstanding as of December 31, 2025	50,364	$	196.23	2.4	$	—

Options exercisable as of December 31, 2025	50,364	$	196.23	2.4	$	—

The total intrinsic value of stock options exercised during the years ended December 31, 2025, 2024 and 2023 were approximately less than $0.1 million, $0.1 million and $3.6 million, respectively. The intrinsic value is calculated as the difference between the current market price of the underlying security and the strike price of a related option.

As of December 31, 2025, all compensation expense related to outstanding stock options was recognized.

Restricted Stock Awards

RSAs granted under the LTIP program are subject to time vesting generally over a one to three-year period. In addition, as part of the Company’s Annual Incentive Plan, non-vested shares may be issued to key employees, which generally would vest over a period of two-to five-years. Share-based compensation for RSAs is recognized using the graded vesting method over the vesting periods.

Activity of restricted stock awards granted under the Company’s LTIP plan is shown below:


	Number of Shares	Weighted Average Grant Date Fair Value (per share)
Non-vested restricted stock awards, December 31, 2024	29,751	$	177.12
Granted	—	—
Vested	22,777	178.94
Forfeited	2,705	165.66
Non-vested restricted stock awards, December 31, 2025	4,269	$	174.72

The fair value of the non-vested stock is based on the trading price of the Company’s common stock on the date of grant. As of December 31, 2025, unrecognized compensation expense related to these awards was $0.1 million, to be recognized over a weighted average remaining period of 0.2 years.

Restricted Stock Units

As a component of its LTIP, the Company granted RSUs subject to time vesting generally over a one to three year period. Share-based compensation for time-based RSUs is recognized on a graded basis over the vesting periods.

Additionally, during the fourth quarter of 2024, the Company granted 9,820 time-based RSUs subject to a performance modifier based on the Company’s relative TSR compared to the S&P Composite 1500 Chemicals Index that vest on the third anniversary of the grant. The target number of RSUs that vest may range from 75% to 125% of the target number of RSUs depending on the achievement of the relative TSR performance criteria measured at the end of the three-year performance period. Share-based compensation expense for these awards is recognized on a straight-line basis over the vesting period.

Activity of restricted stock units granted under the Company’s LTIP plan is shown below:


	Number of Units	Weighted Average Grant Date Fair Value (per unit)
Non-vested restricted stock units, December 31, 2024	68,630	$	182.90
Granted	84,479	125.35
Vested	32,004	154.21
Forfeited	10,059	151.42
Non-vested restricted stock units, December 31, 2025	111,046	$	150.24

The fair value of the time-based non-vested RSUs is based on the trading price of the Company’s common stock on the date of grant. The fair value of RSUs subject to a performance modifier is valued using a Monte Carlo simulation on the grant date and used the following assumptions set below:


	December 2024 Grant
Risk-free interest rate	4.21	%
Dividend yield	0.00%
Expected term (years)	3.0

As of December 31, 2025, unrecognized compensation expense related to RSUs was $7.2 million, to be recognized over a weighted average remaining period of 1.4 years.

Performance Stock Units

The Company grants PSUs as a component of its LTIP and other equity compensation plans. The number of shares that may ultimately be issued as settlement for each award may range from 0% up to 200% of the target award, subject to the achievement of the Company’s market-based TSR relative to the performance of a selected peer group, and separately the achievement of a performance-based return on invested capital (“ROIC”) measure. The service period required for the PSUs is generally three years and the measurement period of the market-based and performance objectives is generally from January 1 of the year of grant through December 31 of the year prior to issuances of the shares. Share-based compensation for PSUs subject to time vesting is recognized on a straight-line basis over the vesting period.

As mentioned above, a portion of the Company’s PSUs are subject to achievement of the Company’s TSR relative to the performance of a selected peer group. For PSUs granted prior to 2024, the Company’s peer group was the S&P Midcap 400 Materials group. In 2024, the Company made an election to change peer groups to the S&P Composite 1500 Chemicals Index. For PSUs subject to relative TSR performance granted in 2024 and 2025, the peer group was the S&P Composite 1500 Chemicals Index

Activity of performance stock units granted under the Company’s LTIP plan is shown below:


	Number of Units	Weighted Average Grant Date Fair Value (per unit)
Non-vested performance stock units, December 31, 2024	55,693	$	216.51
Granted	56,347	139.67
Vested	—	—
Forfeited	7,967	120.62
Non-vested performance stock units, December 31, 2025	104,073	$	195.42

The fair value of PSUs granted with a ROIC condition is based on the trading price of the Company’s common stock on the date of grant. PSUs granted with a relative TSR condition are valued using a Monte Carlo simulation as of the grant date. The grant-date fair value of the PSUs valued using a Monte Carlo simulation included the following assumptions set forth in the table below:


	March 2025 Grant		March 2024 Grant		March 2023 Grant

Risk-free interest rate	3.96	%	4.55	%	3.85	%
Dividend yield	1.51	%	0.91	%	0.96	%
Expected term (years)	3.0		3.0		3.0

As of December 31, 2025, there was approximately $6.0 million of total unrecognized compensation cost related to PSUs which the Company expects to recognize over a weighted-average period of 1.9 years.

2023 Director Stock Ownership Plan

In March 2023, the Company adopted the 2023 Director Stock Ownership Plan (the “Plan”), to encourage the Directors to increase their individual investment in the Company, which was approved at the Company’s May 2023 shareholders’ meeting. The Plan authorizes the issuance of up to 75,000 shares of Quaker common stock in accordance with the terms of the Plan in payment of all or a portion of the annual cash retainer payable to each of the Company’s non-employee directors in 2023 and subsequent years during the term of the Plan. Under the Plan, each director who, on May 1 of the applicable calendar year, owns less than 500% of the annual cash retainer for the applicable calendar year, divided by the average of the closing price of a share of Quaker Common Stock as reported by the composite tape of the New York Stock Exchange for the previous calendar year (the “Threshold Amount”), is required to receive 75% of the annual cash retainer in Quaker common stock and 25% of the retainer in cash, unless the director elects to receive a greater percentage of Quaker common stock, up to 100% of the annual cash retainer for the applicable year. Each director who owns more than the Threshold Amount may elect to receive common stock in payment of a percentage (up to 100%) of the annual cash retainer. The annual retainer is approximately $0.1 million and the retainer payment date is June 1.

Common Stock and Preferred Stock

The Company has 30,000,000 shares of common stock authorized with a par value of $1.00, and 17,331,779 and 17,673,607 shares issued and outstanding as of December 31, 2025 and 2024, respectively. The change in shares issued and outstanding during 2025 was primarily related to 364,797 shares repurchased by the Company under the share repurchase program as described below, 12,182 shares surrendered from employees in payment of the vesting of restricted stock awards or units, 2,617 shares forfeited by employees under equity compensation plans, offset by 37,768 share issuances relating to equity compensation plans.

The Company is authorized to issue 10,000,000 shares of preferred stock with a par value of $1.00, subject to approval by the Board. The Board may designate one or more series of preferred stock and the number of shares, rights, preferences, and limitations of each series. As of December 31, 2025, no preferred stock had been issued.

Share Repurchase Program

As previously disclosed, the Board of Directors of the Company has approved a share repurchase program (“2024 Share Repurchase Program”), authorizing the Company to repurchase up to an aggregate of $150 million of the Company’s outstanding common stock and replacing the prior share repurchase program. The 2024 Share Repurchase Program was effective immediately upon approval and has no expiration date. The number of shares to be repurchased and the timing of such transactions depends on a variety of factors, including market conditions. As of December 31, 2025, there was approximately $59.2 million of capacity remaining under the 2024 Share Repurchase Program. The Company repurchased 364,797 and 312,997 shares under the 2024 Share Repurchase Program for the year ended December 31, 2025 and 2024, respectively.

Under the 2024 Share Repurchase Program, the Company is authorized to repurchase shares through open market purchases, privately-negotiated transactions, accelerated share repurchases or otherwise in accordance with applicable federal securities laws, including through Rule 10b5-1 and under Rule 10b-18 of the Securities Exchange Act of 1934, as amended. The Company currently expects to employ trading plans for the repurchase of shares pursuant to the 2024 Share Repurchase Program, which would permit the Company to purchase shares, at predetermined price targets, when it may otherwise be precluded from doing so. The repurchases may be suspended or discontinued at any time. The specific timing and amount of repurchases will vary based on available capital resources and other financial and operational performance, market conditions, securities law limitations, and other factors.

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2025	Dec. 31, 2022	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization			$ 63,000	$ 58,200	$ 58,200
Indefinite-lived trademarks			201,200	185,300
Impairment charges	$ 88,800	$ 93,000	$ 88,840	$ 0	$ 0
Goodwill, impairment loss, net of tax	$ 86,700

Business Acquisitions - Schedule of Intangible Assets (Details) - Dipsol $ in Thousands	Apr. 01, 2025 USD ($)
Business Combination [Line Items]
Acquired intangible assets	$ 55,000
Americas \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	3,500
EMEA \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	200
Asia/Pacific \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	51,300
Customer Relationships
Business Combination [Line Items]
Acquired intangible assets	30,000
Customer Relationships \| Americas \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	3,500
Customer Relationships \| EMEA \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	200
Customer Relationships \| Asia/Pacific \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	26,300
Product Technologies
Business Combination [Line Items]
Acquired intangible assets	18,000
Product Technologies \| Americas \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	0
Product Technologies \| EMEA \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	0
Product Technologies \| Asia/Pacific \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	18,000
Trademarks
Business Combination [Line Items]
Acquired intangible assets	7,000
Trademarks \| Americas \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	0
Trademarks \| EMEA \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	0
Trademarks \| Asia/Pacific \| Operating Segments
Business Combination [Line Items]
Acquired intangible assets	$ 7,000

Accounts Receivable and Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2025

Receivables [Abstract]

Schedule of Changes in Allowance for Credit Losses

The following are changes in the allowance for credit losses during the years ended December 31, 2025, 2024 and 2023:


	Balance at Beginning of Period		Changes to Costs and Expenses		Write-Offs Charged to Allowance		Exchange Rate Changes and Other Adjustments		Balance at End of Period
Year ended December 31, 2025	$	13,587	$	737	$	(575)	$	1,192	$	14,941
Year ended December 31, 2024	$	13,302	$	2,120	$	(1,215)	$	(620)	$	13,587
Year ended December 31, 2023	$	13,527	$	1,327	$	(961)	$	(591)	$	13,302

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Schedule of Summarizes Earnings Per Share Calculations

The following table summarizes earnings per share calculations for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023
Basic earnings per common share
Net (loss) income attributable to Quaker Chemical Corporation	$	(2,488)	$	116,644	$	112,748
Less: loss (income) allocated to participating securities	20		(375)		(555)
Net (loss) income available to common shareholders	$	(2,468)	$	116,269	$	112,193
Basic weighted average common shares outstanding	17,472,907		17,850,462		17,892,461
Basic (loss) earnings per common share	$	(0.14)	$	6.51	$	6.27

Diluted earnings per common share
Net (loss) income attributable to Quaker Chemical Corporation	$	(2,488)	$	116,644	$	112,748
Less: loss (income) allocated to participating securities	20		(375)		(554)
Net (loss) income available to common shareholders	$	(2,468)	$	116,269	$	112,194
Basic weighted average common shares outstanding	17,472,907		17,850,462		17,892,461
Effect of dilutive securities	—		19,605		22,348
Diluted weighted average common shares outstanding	17,472,907		17,870,067		17,914,809
Diluted (loss) earnings per common share	$	(0.14)	$	6.51	$	6.26

Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Apr. 01, 2025	Feb. 28, 2025	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill beginning balance	$ 518,894	$ 512,518
Goodwill recognized for Sutai acquisition	(233)	5,511
Currency translation adjustments	14,494	(15,583)
Goodwill impairments	(88,840)
Goodwill ending balance	$ 501,720	518,894
Goodwill Impairment Loss Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag	Goodwill impairments
Goodwill, gross	$ 694,311	611,498			$ 609,571
Accumulated impairment losses	(192,591)	(92,604)			(97,053)
Goodwill, net	501,720	518,894			512,518
IKV
Goodwill [Roll Forward]
Goodwill recognized		16,448
Dipsol
Goodwill [Roll Forward]
Goodwill recognized	53,059
Goodwill, net			$ 53,059
Natech
Goodwill [Roll Forward]
Goodwill recognized	2,625
Goodwill, net			2,600
CSI
Goodwill [Roll Forward]
Goodwill recognized	1,721
Goodwill, net				$ 1,700
Operating Segments \| Americas
Goodwill [Roll Forward]
Goodwill beginning balance	276,875	283,103
Goodwill recognized for Sutai acquisition	0	0
Currency translation adjustments	4,383	(6,228)
Goodwill impairments	0
Goodwill ending balance	287,028	276,875
Goodwill, net	287,028	276,875			283,103
Operating Segments \| Americas \| IKV
Goodwill [Roll Forward]
Goodwill recognized		0
Operating Segments \| Americas \| Dipsol
Goodwill [Roll Forward]
Goodwill recognized	5,770
Goodwill, net			5,800
Operating Segments \| Americas \| Natech
Goodwill [Roll Forward]
Goodwill recognized	0
Operating Segments \| Americas \| CSI
Goodwill [Roll Forward]
Goodwill recognized	0
Operating Segments \| EMEA
Goodwill [Roll Forward]
Goodwill beginning balance	80,404	65,940
Goodwill recognized for Sutai acquisition	0	0
Currency translation adjustments	3,710	(1,984)
Goodwill impairments	(88,840)
Goodwill ending balance	0	80,404
Goodwill, net	0	80,404			65,940
Operating Segments \| EMEA \| IKV
Goodwill [Roll Forward]
Goodwill recognized		16,448
Operating Segments \| EMEA \| Dipsol
Goodwill [Roll Forward]
Goodwill recognized	380
Goodwill, net			400
Operating Segments \| EMEA \| Natech
Goodwill [Roll Forward]
Goodwill recognized	2,625
Operating Segments \| EMEA \| CSI
Goodwill [Roll Forward]
Goodwill recognized	1,721
Operating Segments \| Asia/Pacific
Goodwill [Roll Forward]
Goodwill beginning balance	161,615	163,475
Goodwill recognized for Sutai acquisition	(233)	5,511
Currency translation adjustments	6,401	(7,371)
Goodwill impairments	0
Goodwill ending balance	214,692	161,615
Goodwill, net	214,692	161,615			$ 163,475
Operating Segments \| Asia/Pacific \| IKV
Goodwill [Roll Forward]
Goodwill recognized		$ 0
Operating Segments \| Asia/Pacific \| Dipsol
Goodwill [Roll Forward]
Goodwill recognized	46,909
Goodwill, net			$ 46,900
Operating Segments \| Asia/Pacific \| Natech
Goodwill [Roll Forward]
Goodwill recognized	0
Operating Segments \| Asia/Pacific \| CSI
Goodwill [Roll Forward]
Goodwill recognized	$ 0

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 1,888,634	$ 1,839,686	$ 1,953,313
Cost of goods sold (excluding amortization expense - See Note 15)	1,209,262	1,153,656	1,247,669
Gross profit	679,372	686,030	705,644
Selling, general and administrative expenses	502,416	484,794	483,561
Impairment charges	88,840	0	0
Restructuring and related charges, net	35,130	6,530	7,588
Operating income	52,986	194,706	214,495
Other (expense) income, net	(1,909)	1,354	(10,672)
Interest expense	(44,048)	(41,002)	(50,699)
Income before taxes and equity in net income of associated companies	7,029	155,058	153,124
Taxes on income before equity in net income of associated companies	24,607	49,300	55,585
(Loss) income before equity in net income of associated companies	(17,578)	105,758	97,539
Equity in net income of associated companies	15,177	10,971	15,333
Net (loss) income	(2,401)	116,729	112,872
Less: Net income attributable to noncontrolling interest	87	85	124
Net (loss) income attributable to Quaker Chemical Corporation	$ (2,488)	$ 116,644	$ 112,748
Per share data:
Net (loss) income attributable to Quaker Chemical Corporation common shareholders– basic (in dollars per share)	$ (0.14)	$ 6.51	$ 6.27
Net (loss) income attributable to Quaker Chemical Corporation common shareholders – diluted (in dollars per share)	$ (0.14)	$ 6.51	$ 6.26

Other (Expense) income, net

12 Months Ended

Dec. 31, 2025

Other Income and Expenses [Abstract]

Other (Expense) income, net

Other (expense) income, net for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
Income from third party license fees	$	842	$	810	$	1,210
Foreign exchange losses, net	(8,386)		(1,783)		(14,785)
Gain on disposals of property, plant, equipment and other assets, net	2,204		810		1,307
Non-income tax refunds and other related credits	2,922		3,742		1,339
Pension and postretirement benefit costs, non-service components	(1,676)		(1,827)		(2,033)
Facility remediation recoveries, net	—		—		2,141
Business interruption insurance proceeds	—		1,000		—
Product liability claim costs, net	—		(2,040)		—
Earnout liability adjustment	454		400		—
Interest income	2,594		—		—
Multiemployer plan withdrawal charge	(923)		—		—
Other non-operating income, net	60		242		149
Total other (expense) income, net	$	(1,909)	$	1,354	$	(10,672)

Non-income tax refunds and other related credits includes $1.8 million of indirect tax credits and interest received during the year ended December 31, 2025 relating to the Brazil Supreme Court ruling in regard to certain non-income (indirect) taxes that have been previously charged and paid.

Foreign exchange losses, net, during the years ended December 31, 2025, 2024 and 2023, include foreign currency transaction losses of approximately $2.2 million, $0.8 million and $7.8 million, respectively, related to hyper-inflationary accounting. See Note 1, Basis of Presentation and Significant Accounting Policies, for additional information. Foreign exchange losses, net also includes a $1.4 million foreign exchange loss recognized during the year ended December 31, 2025 relating to the change in fair value of the foreign exchange forward contracts entered into in connection with the acquisition of Dipsol. See Note 24, Hedging Activities, for more information.

Gain on disposals of property, plant, equipment and other assets, net, includes gains recognized in 2025, 2024 and 2023 for the sale of certain property previously classified as held for sale. See Note 7, Restructuring and Related Activities, for more information.

Multiemployer plan withdrawal charge during the year ended December 31, 2025 represents a $0.9 million expense related to the Company withdrawing from the Cleveland Bakers and Teamsters Pension Fund, a multiemployer defined benefit pension plan, in connection with a site closure under the Company’s restructuring program and facility closure actions.

Business interruption insurance proceeds for the year ended December 31, 2024 reflects an insurance recovery of $1.0 million related to production losses due to an electrical fire in 2021 that resulted in temporary shutdown of production at one of the Company’s production facilities. See Note 25, Commitments and Contingencies, for additional discussion regarding the Company’s business interruption claims.

Product liability claim costs, net represents expense related to payments by the Company in connection with product liability disputes with customers, net of insurance recoveries during the year ended December 31, 2024.

Facility remediation recoveries, net, for the year ended December 31, 2023 reflects insurance recoveries of costs for remediation and restoration of property damage.

Pension and Other Postretirement Benefits - Schedule of Assumptions Used in Determining Benefit Obligations and Net Periodic Pension Costs (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate for next year	7.65%	7.05%	6.87%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.00%	4.00%	4.00%
Year that the rate reaches the ultimate trend rate	2050	2049	2048
U.S. \| Pension Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	5.21%	5.49%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.49%	4.94%	5.21%
Expected long-term return on plan assets	5.75%	5.50%	5.50%
U.S. \| Other Postretirement Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.88%	5.34%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.32%	4.87%	5.15%
Foreign \| Pension Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.91%	4.64%
Rate of compensation increase	3.19%	3.33%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.53%	4.33%	4.77%
Expected long-term return on plan assets	4.28%	4.20%	4.03%
Rate of compensation increase	3.30%	3.26%	3.38%

Other Accrued Liabilities

12 Months Ended

Dec. 31, 2025

Accrued Liabilities, Current [Abstract]

Other Accrued Liabilities

Other accrued liabilities as of December 31, 2025 and 2024 were as follows:


	2025		2024
Non-income taxes	$	29,345	$	25,455
Current income taxes payable (See Note 10)	10,929		12,772
Selling expenses and freight accruals	9,848		10,716
Short-term lease liabilities (See Note 6)	12,536		10,619
Professional fees, legal, and acquisition-related accruals	7,009		5,340
Customer advances and sales return reserves	4,833		3,855
Accrued insurance	3,851		6,041
Accrued environmental reserves (See Note 25)	1,516		1,235
Accrued interest (See Note 19)	1,312		1,289
Accrued rent and facilities	956		1,129
Multiemployer plan withdrawal charge (See Note 9)	901		—
Accrued non-pension benefits	678		833
Deferred acquisition payment (See Note 2)	538		—

Earnout liability (See Note 2)	—		1,160
Other	845		224
Total other accrued liabilities	$	85,097	$	80,668

Recently Issued Accounting Standards	12 Months Ended
Recently Issued Accounting Standards	Dec. 31, 2025
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Standards	Recently Issued Accounting Standards Recently Adopted Accounting Standards The Company has adopted Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures beginning with the 2024 Form 10-K and the Form 10-Q for the period ended March 31, 2025. This ASU expands reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses, defined as those expenses that are regularly provided to the Chief Operating Decision Maker (“CODM”) and included in the reported measure of segment profit or loss. The Company disclosed that the CODM assesses segment performance and makes decisions about allocating resources to its operating segments using segment operating earnings. Based on the Company’s assessment, the Company determined that product costs are significant segment expenses that are regularly provided to the CODM and included in segment operating earnings. See Note 4, Business Segments, for additional information. The Company has adopted ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures on a prospective basis in this Report. Pursuant to this ASU, the Company disclosed additional information in specified categories with respect to the reconciliation of the effective tax rate to the statutory rate (the “rate reconciliation”) for federal, state, and foreign income taxes, which required greater detail about individual reconciling items in the rate reconciliation to the extent the impact of those items exceeded a specified threshold. Additionally, the Company disclosed income taxes paid disaggregated by federal, state, and foreign taxes and further disaggregated these disclosures in certain jurisdictions where income taxes paid exceeded a certain threshold. See Note 10, Income Taxes, for additional information. Recently Issued Accounting Standards Not Yet Adopted The FASB issued ASU 2024-03, Income Statement- Reporting Comprehensive Income- Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses in November 2024. This ASU requires public business entities (“PBEs”) to disclose, in interim and annual reporting periods, additional information about certain expenses in the notes to the financial statements, including disclosing the amounts of purchases of inventory, employee compensation, depreciation, and intangible asset amortization in each relevant expense caption. It also requires PBEs to disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively and to disclose the total amount of selling expenses, and in the annual reporting periods, an entity’s definition of selling expenses. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements. The FASB issued ASU 2025-06, Intangibles- Goodwill and Other- Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software in September 2025. This ASU removes all references to prescriptive and sequential software development stages and will now require PBEs to start capitalizing software costs when management has authorized and committed to funding the software project and it is probable that the project will be completed and the software will be used to perform the function intended. The ASU also specifies that the disclosures in Subtopic 360-10, Property, Plant, and Equipment- Overall are required for all capitalized internal-use software costs. ASU 2025-06 is effective for fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements. The FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements in December 2025. This ASU amends Topic 270, by improving the navigability of the required interim disclosures and clarifying when that guidance is applicable. The amendments also provide additional guidance on what disclosures should be provided in interim reporting periods. Additionally, the amendment requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476173/280-10-65-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-7

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
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-URI https://asc.fasb.org/1943274/2147483550/848-10-65-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(i)
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-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Paragraph 2
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Paragraph 5
-Subparagraph (SAB Topic 11.M.Q2)
-Publisher FASB
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
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-Name Accounting Standards Codification
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-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-6

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(1)
-Publisher FASB
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Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 250
-Publisher FASB
-URI https://asc.fasb.org/250/tableOfContent

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

+ Details

Equity - Schedule of Valuation Assumptions (Details)	12 Months Ended
Equity - Schedule of Valuation Assumptions (Details)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	4.21%
Dividend yield	0.00%
Expected term (years)	3 years
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	3.96%	4.55%	3.85%
Dividend yield	1.51%	0.91%	0.96%
Expected term (years)	3 years	3 years	3 years

Accounts Receivable and Allowance for Credit Losses

12 Months Ended

Dec. 31, 2025

Receivables [Abstract]

Accounts Receivable and Allowance for Credit Losses

As of December 31, 2025 and 2024, the Company had gross trade accounts receivable totaling $432.1 million and $413.7 million, respectively. The following are changes in the allowance for credit losses during the years ended December 31, 2025, 2024 and 2023:


	Balance at Beginning of Period		Changes to Costs and Expenses		Write-Offs Charged to Allowance		Exchange Rate Changes and Other Adjustments		Balance at End of Period
Year ended December 31, 2025	$	13,587	$	737	$	(575)	$	1,192	$	14,941
Year ended December 31, 2024	$	13,302	$	2,120	$	(1,215)	$	(620)	$	13,587
Year ended December 31, 2023	$	13,527	$	1,327	$	(961)	$	(591)	$	13,302

Pension and Other Post Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2025

Retirement Benefits [Abstract]

Schedule of Funded Status of Company's plans' Reconciled with Amounts Reported in Consolidated Balance Sheets

The following table shows the funded status of the Company’s plans’ reconciled with amounts reported in the Consolidated Balance Sheets as of December 31, 2025 and 2024:


	Pension Benefits												Other Post- Retirement Benefits
	2025						2024						2025		2024
	Foreign		U.S.		Total		Foreign		U.S.		Total		U.S.		U.S.
Change in benefit obligation
Gross benefit obligation at beginning of year	$	131,794	$	73,370	$	205,164	$	144,779	$	79,063	$	223,842	$	1,213	$	1,343
Service cost	436		—		436		417		—		417		—		—
Interest cost	5,902		3,571		9,473		5,817		3,672		9,489		61		61


Curtailment gain	—		—		—		(19)		—		(19)		—		—
Plan settlements	(689)		—		(689)		—		—		—		—		—
Benefits paid	(6,674)		(6,488)		(13,162)		(6,377)		(6,519)		(12,896)		(253)		(156)
Plan expenses and premiums paid	(62)		—		(62)		(36)		—		(36)		—		—

Actuarial (gain) loss	(6,716)		1,852		(4,864)		(6,589)		(2,845)		(9,434)		210		(61)
Translation differences and other	14,034		—		14,034		(6,198)		(1)		(6,199)		—		26
Gross benefit obligation at end of year	$	138,025	$	72,305	$	210,330	$	131,794	$	73,370	$	205,164	$	1,231	$	1,213


	Pension Benefits												Other Post- Retirement Benefits
	2025						2024						2025		2024
	Foreign		U.S.		Total		Foreign		U.S.		Total		U.S.		U.S.
Change in plan assets
Fair value of plan assets at beginning of year	$	122,963	$	59,548	$	182,511	$	135,387	$	60,967	$	196,354	$	—	$	—
Actual return on plan assets	(1,445)		5,263		3,818		(3,003)		1,349		(1,654)		—		—
Employer contributions	3,397		2,594		5,991		2,043		3,751		5,794		253		156

Plan settlements	(689)		—		(689)		—		—		—		—		—
Benefits paid	(6,674)		(6,488)		(13,162)		(6,377)		(6,519)		(12,896)		(253)		(156)
Plan expenses and premiums paid	(62)		—		(62)		(36)		—		(36)		—		—
Translation differences	12,759		—		12,759		(5,051)		—		(5,051)		—		—
Fair value of plan assets at end of year	$	130,249	$	60,917	$	191,166	$	122,963	$	59,548	$	182,511	$	—	$	—
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)

Amounts recognized in the balance sheet consist of:
Non-current assets	$	2,209	$	137	$	2,346	$	2,245	$	—	$	2,245	$	—	$	—
Current liabilities	(405)		(1,542)		(1,947)		(400)		(1,758)		(2,158)		(179)		(170)
Non-current liabilities	(9,580)		(9,983)		(19,563)		(10,676)		(12,064)		(22,740)		(1,052)		(1,043)
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss:
Prior service cost	(280)		—		(280)		(265)		—		(265)		—		—
Accumulated (loss) gain	(21,672)		4,629		(17,043)		(19,775)		3,905		(15,870)		896		1,199

AOCI	(21,952)		4,629		(17,323)		(20,040)		3,905		(16,135)		896		1,199
Cumulative employer contributions in excess of or (below) net periodic benefit cost	14,176		(16,017)		(1,841)		11,209		(17,727)		(6,518)		(2,127)		(2,412)
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)

Schedule of Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets

Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	2025			2024
	Foreign	U.S.	Total	Foreign	U.S.	Total
Accumulated benefit obligation	7,207	11,355	18,562	72,836	73,370	146,206
Fair value of plan assets	2,536	—	2,536	66,838	59,548	126,386

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets

Information for pension plans with a projected benefit obligation in excess of plan assets:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Projected benefit obligation	$	80,464	$	11,513	$	91,977	$	77,914	$	73,370	$	151,284
Fair value of plan assets	70,481		—		70,481		66,838		59,548		126,386

Schedule of Components of Net Periodic Benefit Costs - Pension Plans

Components of net periodic benefit costs – pension plans:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Service cost	$	436	$	—	$	436	$	417	$	—	$	417
Interest cost	5,902		3,571		9,473		5,817		3,672		9,489
Expected return on plan assets	(5,537)		(2,710)		(8,247)		(5,571)		(2,562)		(8,133)
Settlement gain	(136)		—		(136)		—		—		—
Curtailment gain	—		—		—		(19)		—		(19)
Actuarial loss amortization	572		23		595		481		24		505
Prior service cost amortization	24		—		24		27		(1)		26
Net periodic benefit cost	$	1,261	$	884	$	2,145	$	1,152	$	1,133	$	2,285


	2023
	Foreign		U.S.		Total
Service cost	$	399	$	28	$	427
Interest cost	6,083		3,849		9,932
Expected return on plan assets	(5,271)		(2,799)		(8,070)

Curtailment (gain) loss	(213)		15		(198)
Actuarial loss amortization	388		22		410
Prior service cost amortization	28		6		34
Net periodic benefit costs	$	1,414	$	1,121	$	2,535

Components of net periodic benefit costs – other postretirement plan:


	2025		2024		2023

Interest cost	61		61		69
Actuarial gain amortization	(94)		(102)		(128)
Prior service credit amortization	—		—		(16)
Net periodic benefit costs	$	(33)	$	(41)	$	(75)

Schedule of Other Changes Recognized in Other Comprehensive Income - Pension Plans

Other changes recognized in other comprehensive income – pension plans:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Net loss (gain) arising during the period	$	266	$	(701)	$	(435)	$	1,985	$	(1,631)	$	354


Settlement gain (loss)	130		—		130		—		(24)		(24)

Actuarial loss	(566)		(26)		(592)		(481)		—		(481)
Curtailment recognition	(24)		3		(21)		(27)		—		(27)
Effect of exchange rates on amounts included in AOCI	2,105		—		2,105		(908)		—		(908)
Total recognized in other comprehensive loss (income)	1,911		(724)		1,187		569		(1,655)		(1,086)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$	3,172	$	160	$	3,332	$	1,721	$	(521)	$	1,200


	2023
	Foreign		U.S.		Total
Net loss arising during period	$	8,605	$	398	$	9,003
Settlement loss	—		(23)		(23)
Prior service cost	—		(15)		(15)
Actuarial loss	(388)		(92)		(480)
Curtailment recognition	(28)		—		(28)
Effect of exchange rates on amounts included in AOCI	560		—		560
Total recognized in other comprehensive loss	8,749		268		9,017
Total recognized in net periodic benefit cost and other comprehensive loss	$	10,163	$	1,389	$	11,552

Other changes recognized in other comprehensive income – other postretirement benefit plans:


	2025		2024		2023
Net (loss) gain arising during period	$	210	$	(61)	$	(150)
Recognition of amortizations in net periodic benefit cost	—		—		—
Prior service credit	—		—		16
Actuarial gain amortization	94		102		127
Total recognized in other comprehensive loss (income)	304		41		(7)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$	271	$	—	$	(82)

Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligations

Weighted-average assumptions used to determine benefit obligations as of December 31, 2025 and 2024:


	Pension Benefits		Other Postretirement Benefits
	2025	2024	2025	2024
U.S. Plans
Discount rate	5.21%	5.49%	4.88%	5.34%
Rate of compensation increase	N/A	N/A	N/A	N/A

Foreign Plans
Discount rate	4.91%	4.64%	N/A	N/A
Rate of compensation increase	3.19%	3.33%	N/A	N/A

Weighted-average assumptions used to determine net periodic benefit costs for the years ended December 31, 2025, 2024 and 2023:


	Pension Benefits						Other Postretirement Benefits
	2025		2024		2023		2025		2024		2023
U.S. Plans
Discount rate	5.49	%	4.94	%	5.21	%	5.32	%	4.87	%	5.15	%
Expected long-term return on plan assets	5.75	%	5.50	%	5.50	%	N/A		N/A		N/A
Rate of compensation increase	N/A		N/A		N/A		N/A		N/A		N/A

Foreign Plans
Discount rate	4.53	%	4.33	%	4.77	%	N/A		N/A		N/A
Expected long-term return on plan assets	4.28	%	4.20	%	4.03	%	N/A		N/A		N/A
Rate of compensation increase	3.30	%	3.26	%	3.38	%	N/A		N/A		N/A

Schedule of Assumed Health Care Cost Trend Rates

Assumed health care cost trend rates as of December 31, 2025, 2024 and 2023:


	2025		2024		2023
Health care cost trend rate for next year	7.65	%	7.05	%	6.87	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.00	%	4.00	%	4.00	%
Year that the rate reaches the ultimate trend rate	2050		2049		2048

Schedule of Pension Plan Target Asset Allocation and Pension Plan Investments Measured at Fair Value on Recurring Basis

The Company’s pension plan target asset allocation and the weighted-average asset allocations as of December 31, 2025 and 2024 by asset category were as follows:


Asset Category	Target		2025		2024
U.S. Plans
Equity securities	20	%	21	%	27	%
Debt securities	80	%	79	%	71	%
Other	—	%	—	%	2	%
Total	100	%	100	%	100	%

Foreign Plans
Equity securities	17	%	21	%	18	%
Debt securities	68	%	61	%	62	%
Other	15	%	18	%	20	%
Total	100	%	100	%	100	%

As of December 31, 2025 and 2024, the U.S. and foreign plans’ investments measured at fair value on a recurring basis were as follows:


			Fair Value Measurements at December 31, 2025
	Total Fair Value		Using Fair Value Hierarchy
U.S. Pension Assets			Level 1		Level 2		Level 3
Pooled separate accounts	$	60,917	$	—	$	60,917	$	—
Real estate	—		—		—		—
Subtotal U.S. pension plan assets in fair value hierarchy	$	60,917	$	—	$	60,917	$	—
Total U.S. pension plan assets	$	60,917

Foreign Pension Assets
Cash and cash equivalents	$	1,417	$	1,417	$	—	$	—
Insurance contract	113,184		—		—		113,184
Diversified equity securities - registered investment companies	2,625		—		2,625		—
Fixed income – foreign registered investment companies	9,166		—		9,166		—
Real estate	—		—		—		—
Other - alternative investments	$	1,321	$	—	$	—	$	1,321
Subtotal foreign pension assets in fair value hierarchy	$	127,713	$	1,417	$	11,791	$	114,505
Commingled funds measured at NAV	2,536
Total foreign pension assets	$	130,249

Total pension assets in fair value hierarchy	$	188,630	$	1,417	$	72,708	$	114,505
Total pension assets measured at NAV	2,536
Total pension assets	$	191,166


			Fair Value Measurements at December 31, 2024
	Total Fair Value		Using Fair Value Hierarchy
U.S. Pension Assets			Level 1		Level 2		Level 3
Pooled separate accounts	$	58,454	$	—	$	58,454	$	—
Real estate	1,094		—		—		1,094
Subtotal U.S. pension plan assets in fair value hierarchy	$	59,548	$	—	$	58,454	$	1,094
Total U.S. pension plan assets	$	59,548

Foreign Pension Assets
Cash and cash equivalents	$	1,014	$	1,014	$	—	$	—
Insurance contract	107,797		—		—		107,797
Diversified equity securities - registered investment companies	2,045		—		2,045		—
Fixed income – foreign registered investment companies	8,355		—		8,355		—

Real estate	1,717		—		—		1,717

Subtotal foreign pension assets in fair value hierarchy	$	120,928	$	1,014	$	10,400	$	109,514
Commingled funds measured at NAV	2,035
Total foreign pension assets	$	122,963

Total pension assets in fair value hierarchy	$	180,476	$	1,014	$	68,854	$	110,608
Total pension assets measured at NAV	2,035
Total pension assets	$	182,511

Schedule of Changes in Fair Value of Plans Level 3 Investments

Changes in the fair value of the plans’ Level 3 investments during the years ended December 31, 2025 and 2024 were as follows:


	Insurance Contract		Real Estate		Total
Balance as of December 31, 2023	$	118,393	$	5,918	$	124,311
Sales	(1,310)		(2,952)		(4,262)

Unrealized losses	(4,620)		(128)		(4,748)
Currency translation adjustment	(4,666)		(27)		(4,693)
Balance as of December 31, 2024	107,797		2,811		110,608
Sales	(1,023)		(1,098)		(2,121)
Unrealized losses	(4,968)		(507)		(5,475)
Currency translation adjustment	11,378		115		11,493
Balance as of December 31, 2025	$	113,184	$	1,321	$	114,505

Schedule of Expected Benefit Payments

Excluding any impact related to the PPA noted above, the following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:


	Pension Benefits						Other Post- Retirement Benefits
	Foreign		U.S.		Total
2026	$	7,246	$	7,882	$	15,128	$	179
2027	7,500		6,272		13,772		157
2028	7,707		6,202		13,909		145
2029	8,605		6,102		14,707		133
2030	9,309		5,956		15,265		122
2031 to 2035	48,766		27,742		76,508		468

Leases

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Leases

The Company has operating leases for facilities, vehicles, and machinery and equipment with remaining lease terms up to 9 years. In addition, the Company has land use leases with remaining lease terms up to 89 years.

The Company’s finance leases are included in PP&E in the Consolidated Balance Sheets. See Note 14, Property, Plant and Equipment, for additional information. The Company has no material variable lease costs or sublease income for the years ended December 31, 2025, 2024 and 2023.

During the year ended December 31, 2024, the Company entered into a new lease agreement for office and laboratory space in Radnor, PA for the purpose of relocating its global headquarters. The lease for one portion of the laboratory space is expected to commence in the second quarter of 2026. The lease for the remaining portions of laboratory and office space is expected to commence upon the completion of the lessor owned leasehold improvements, which is expected to be in the second half of 2026. The lease agreement for the office and laboratory space is expected to expire during 2041. The cumulative future lease commitment for laboratory and office space is $79.7 million. The future lease commitments relating to this lease were not included in the lease liabilities balance as of December 31, 2025.

The components of the Company’s lease expense for the years ended December 31, 2025, 2024 and 2023 are as follows:


	December 31, 2025		December 31, 2024		December 31, 2023
Operating lease expense	$	16,738	$	15,096	$	14,981
Short-term lease expense	572		807		760

Supplemental cash flow information related to the Company’s leases is as follows:


	December 31, 2025		December 31, 2024		December 31, 2023
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	16,508	$	14,923	$	16,020

Non-cash lease liabilities activity
Leased right-of-use assets obtained in exchange for new operating lease liabilities	17,561		9,792		10,044

Supplemental balance sheet information related to the Company’s leases is as follows:


	December 31, 2025			December 31, 2024
Right-of-use lease assets	$	38,737		$	34,120

Other accrued liabilities	12,536			10,619
Long-term lease liabilities	22,759			20,028
Total operating lease liabilities	$	35,295		$	30,647

Weighted average remaining lease term (years)	5.7			5.0
Weighted average discount rate	6.58		%	5.63		%

Maturities of operating lease liabilities as of December 31, 2025 were as follows:



For the year ended December 31, 2026	$	14,135
For the year ended December 31, 2027	9,483
For the year ended December 31, 2028	6,599
For the year ended December 31, 2029	3,706
For the year ended December 31, 2030	2,296
For the year ended December 31, 2031 and beyond	8,051
Total lease payments	44,270
Less: imputed interest	(8,975)
Present value of lease liabilities (1)	$	35,295

(1) The $79.7 million of future lease commitments for the office and laboratory lease expected to commence during 2026 were not included in the lease liabilities balance as of December 31, 2025.

Business Segments - Schedule of Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total segment depreciation	$ 27,628	$ 25,895	$ 23,833
Americas
Segment Reporting Information [Line Items]
Total segment depreciation	11,770	13,646	12,298
EMEA
Segment Reporting Information [Line Items]
Total segment depreciation	8,411	7,641	7,321
Asia/Pacific
Segment Reporting Information [Line Items]
Total segment depreciation	$ 7,447	$ 4,608	$ 4,214

Other Non-Current Assets (Tables)

12 Months Ended

Dec. 31, 2025

Other Assets [Abstract]

Schedule of Other Non-Current Assets

Other non-current assets as of December 31, 2025 and 2024 were as follows:


	2025		2024
Uncertain tax positions (See Note 10)	$	7,254	$	5,334
Pension assets (See Note 20)	2,346		2,245
Debt issuance costs (See Note 19)	1,408		2,374
Interest rate swap (See Note 24)	—		1,621
Net investment hedge (See Note 24)	10,053		—
Long-term note receivable	1,030		925
Cost investments	1,835		—
Trust investment	1,491		1,566
Indemnification assets (See Notes 10 and 21)	457		405
Supplemental retirement income program (See Notes 20 and 23)	311		297
Cloud computing implementation costs	2,037		—
Other	2,061		2,593
Total other non-current assets	$	30,283	$	17,360

Restructuring and Related Activities

12 Months Ended

Dec. 31, 2025

Restructuring and Related Activities [Abstract]

Restructuring and Related Activities

In 2022, the Company initiated a global cost and optimization program to improve its cost structure and drive a more profitable and productive organization. As of December 31, 2025, the program included restructuring and associated severance costs to reduce headcount by approximately 440 positions globally. These actions are expected to be substantially complete by the end of 2026.

Employee separation benefits vary depending on local regulations across countries. The timing to finalize costs associated with all actions will depend on a number of factors and is subject to change. In addition to the global cost and optimization program described above, the Company continues to take actions to optimize its facility footprint. Restructuring costs incurred during the years ended December 31, 2025, 2024 and 2023 include employee severance and asset-related and facility closure costs, including non-cash asset write-offs, which are recorded in Restructuring and related charges, net in the Company’s Consolidated Statements of Operations.

Activity in the Company’s accrual for its restructuring program and facility closure actions for the years ended December 31, 2025 and 2024 are as follows:



Accrued restructuring as of December 31, 2023	$	3,350
Severance costs	3,259
Asset-related charges	3,271
Cash payments	(7,595)
Currency translation adjustments	12
Accrued restructuring as of December 31, 2024	2,297
Severance costs	30,292
Asset-related charges	4,838
Cash payments	(26,598)
Reductions against the reserve	(2,620)
Currency translation adjustments	142
Accrued restructuring as of December 31, 2025	$	8,351

In connection with the plans for closure of certain manufacturing and non-manufacturing facilities, the Company made available for sale certain facilities and properties. As of December 31, 2025, the Company classified properties in the Americas segment with an aggregate book value of approximately $1.2 million as held-for-sale. These assets are recorded in Prepaid expenses and other current assets in the Company’s Consolidated Balance Sheets. The Company expects to complete the sale of these properties over the next 12 months. During the years ended December 31, 2025, 2024 and 2023, the Company completed the sale of certain facilities previously classified as held-for-sale for a net gain of $2.2 million, $0.4 million and $1.4 million, respectively, which is recorded in Other (expense) income, net on the Consolidated Statements of Operations. The Company will continue to evaluate its existing facilities and footprint, which may include making other facilities or property available for sale in the future.

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Examination [Line Items]
Transition tax	$ 15,500
Deferred tax liabilities	128,686	$ 129,612
Undistributed earnings	429,200
Deferred tax assets, state net operating losses	6,000
Deferred tax assets, state net operating losses based on reversal of deferred tax liabilities	1,600
Partial valuation allowance against state net operating losses	4,400
Additional valuation allowance for state deferred tax assets	900
Deferred tax assets, foreign net operating loss carryforwards	26,600
Deferred tax assets, foreign net operating loss carryforwards, partial valuation	3,700
Deferred tax assets, foreign net operating loss carryforwards	22,900
Additional valuation allowance for other foreign deferred tax assets	$ 3,700
Foreign tax credits carryforward period	10 years
Deferred tax assets, foreign tax credit carryforward expected to expire	$ 23,100	19,200
Operating loss carryforward, valuation allowance	20,600	17,200
Income taxes paid, net	59,711	69,000	$ 68,600
Unrecognized tax benefits	12,379	13,949	15,659	$ 16,340
Accrued penalties	0	800
Accrued interest	1,800	2,600
Unrecognized tax benefit, penalties expense	800	200	400
Unrecognized tax benefit, interest expense	800	200	100
Unrecognized tax benefits if recognized	$ 4,900	$ 8,300	$ 10,100
Expiration In Year Five
Income Tax Examination [Line Items]
State net operating losses carryforward period	5 years
Expiration In Twenty Years
Income Tax Examination [Line Items]
State net operating losses carryforward period	20 years
Foreign Tax Jurisdiction
Income Tax Examination [Line Items]
Deferred tax liabilities	$ 8,500

Pension and Other Post Retirement Benefits - Schedule of Change In Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in plan assets
Plan settlements	$ (689)	$ 0
Amounts recognized in the balance sheet consist of:
Non-current assets	2,346	2,245
Current liabilities	(2,126)	(2,328)
Non-current liabilities	(20,615)	(23,783)
Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	205,164	223,842
Service cost	436	417	$ 427
Interest cost	9,473	9,489	9,932
Curtailment gain	0	(19)
Plan settlements	(689)	0
Benefits paid	(13,162)	(12,896)
Plan expenses and premiums paid	(62)	(36)
Actuarial (gain) loss	(4,864)	(9,434)
Translation differences and other	14,034	(6,199)
Gross benefit obligation at end of year	210,330	205,164	223,842
Change in plan assets
Fair value of plan assets at beginning of year	182,511	196,354
Actual return on plan assets	3,818	(1,654)
Employer contributions	5,991	5,794
Benefits paid	(13,162)	(12,896)
Plan expenses and premiums paid	(62)	(36)
Translation differences	12,759	(5,051)
Fair value of plan assets at end of year	191,166	182,511	196,354
Net benefit obligation recognized	(19,164)	(22,653)
Amounts recognized in the balance sheet consist of:
Non-current assets	2,346	2,245
Current liabilities	(1,947)	(2,158)
Non-current liabilities	(19,563)	(22,740)
Net benefit obligation recognized	(19,164)	(22,653)
Prior service cost	(280)	(265)
Accumulated (loss) gain	(17,043)	(15,870)
AOCI	(17,323)	(16,135)
Cumulative employer contributions in excess of or (below) net periodic benefit cost	(1,841)	(6,518)
Other Postretirement Benefits
Change in benefit obligation
Curtailment gain	0
Foreign
Change in plan assets
Plan settlements	(689)	0
Foreign \| Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	131,794	144,779
Service cost	436	417	399
Interest cost	5,902	5,817	6,083
Curtailment gain	0	(19)
Plan settlements	(689)	0
Benefits paid	(6,674)	(6,377)
Plan expenses and premiums paid	(62)	(36)
Actuarial (gain) loss	(6,716)	(6,589)
Translation differences and other	14,034	(6,198)
Gross benefit obligation at end of year	138,025	131,794	144,779
Change in plan assets
Fair value of plan assets at beginning of year	122,963	135,387
Actual return on plan assets	(1,445)	(3,003)
Employer contributions	3,397	2,043
Benefits paid	(6,674)	(6,377)
Plan expenses and premiums paid	(62)	(36)
Translation differences	12,759	(5,051)
Fair value of plan assets at end of year	130,249	122,963	135,387
Net benefit obligation recognized	(7,776)	(8,831)
Amounts recognized in the balance sheet consist of:
Non-current assets	2,209	2,245
Current liabilities	(405)	(400)
Non-current liabilities	(9,580)	(10,676)
Net benefit obligation recognized	(7,776)	(8,831)
Prior service cost	(280)	(265)
Accumulated (loss) gain	(21,672)	(19,775)
AOCI	(21,952)	(20,040)
Cumulative employer contributions in excess of or (below) net periodic benefit cost	14,176	11,209
U.S.
Change in plan assets
Plan settlements	0	0
U.S. \| Pension Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	73,370	79,063
Service cost	0	0	28
Interest cost	3,571	3,672	3,849
Curtailment gain	0	0
Plan settlements	0	0
Benefits paid	(6,488)	(6,519)
Plan expenses and premiums paid	0	0
Actuarial (gain) loss	1,852	(2,845)
Translation differences and other	0	(1)
Gross benefit obligation at end of year	72,305	73,370	79,063
Change in plan assets
Fair value of plan assets at beginning of year	59,548	60,967
Actual return on plan assets	5,263	1,349
Employer contributions	2,594	3,751
Benefits paid	(6,488)	(6,519)
Plan expenses and premiums paid	0	0
Translation differences	0	0
Fair value of plan assets at end of year	60,917	59,548	60,967
Net benefit obligation recognized	(11,388)	(13,822)
Amounts recognized in the balance sheet consist of:
Non-current assets	137	0
Current liabilities	(1,542)	(1,758)
Non-current liabilities	(9,983)	(12,064)
Net benefit obligation recognized	(11,388)	(13,822)
Prior service cost	0	0
Accumulated (loss) gain	4,629	3,905
AOCI	4,629	3,905
Cumulative employer contributions in excess of or (below) net periodic benefit cost	(16,017)	(17,727)
U.S. \| Other Postretirement Benefits
Change in benefit obligation
Gross benefit obligation at beginning of year	1,213	1,343
Service cost	0	0
Interest cost	61	61	69
Curtailment gain		0
Plan settlements	0	0
Benefits paid	(253)	(156)
Plan expenses and premiums paid	0	0
Actuarial (gain) loss	210	(61)
Translation differences and other	0	26
Gross benefit obligation at end of year	1,231	1,213	1,343
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	253	156
Plan settlements	0	0
Benefits paid	(253)	(156)
Plan expenses and premiums paid	0	0
Translation differences	0	0
Fair value of plan assets at end of year	0	0	$ 0
Net benefit obligation recognized	(1,231)	(1,213)
Amounts recognized in the balance sheet consist of:
Non-current assets	0	0
Current liabilities	(179)	(170)
Non-current liabilities	(1,052)	(1,043)
Net benefit obligation recognized	(1,231)	(1,213)
Prior service cost	0	0
Accumulated (loss) gain	896	1,199
AOCI	896	1,199
Cumulative employer contributions in excess of or (below) net periodic benefit cost	$ (2,127)	$ (2,412)

Restructuring and Related Activities (Tables)

12 Months Ended

Dec. 31, 2025

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Related Costs

Activity in the Company’s accrual for its restructuring program and facility closure actions for the years ended December 31, 2025 and 2024 are as follows:



Accrued restructuring as of December 31, 2023	$	3,350
Severance costs	3,259
Asset-related charges	3,271
Cash payments	(7,595)
Currency translation adjustments	12
Accrued restructuring as of December 31, 2024	2,297
Severance costs	30,292
Asset-related charges	4,838
Cash payments	(26,598)
Reductions against the reserve	(2,620)
Currency translation adjustments	142
Accrued restructuring as of December 31, 2025	$	8,351

Pension and Other Postretirement Benefits - Schedule of Level 3 Asset Rollforward (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Change in plan assets
Fair value of plan assets at beginning of year	$ 110,608	$ 124,311
Sales	(2,121)	(4,262)
Unrealized losses	(5,475)	(4,748)
Currency translation adjustment	11,493	(4,693)
Fair value of plan assets at end of year	114,505	110,608
Insurance contract
Change in plan assets
Fair value of plan assets at beginning of year	107,797	118,393
Sales	(1,023)	(1,310)
Unrealized losses	(4,968)	(4,620)
Currency translation adjustment	11,378	(4,666)
Fair value of plan assets at end of year	113,184	107,797
Real estate
Change in plan assets
Fair value of plan assets at beginning of year	2,811	5,918
Sales	(1,098)	(2,952)
Unrealized losses	(507)	(128)
Currency translation adjustment	115	(27)
Fair value of plan assets at end of year	$ 1,321	$ 2,811

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)(ii)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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-Subparagraph (c)(iv)(01)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Paragraph 1
-Subparagraph (d)(iv)(01)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
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-Paragraph 1
-Subparagraph (b)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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Reference 12: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Net Sales and Revenue Recognition - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023
Concentration Risk [Line Items]
Deferred revenue \| $	$ 3.6	$ 4.2
Number of reportable segments \| segment	3
Product line as percentage of consolidated net sales	10.00%	10.00%	10.00%
Top Customer Concentration Risk \| Sales Revenue Net \| Top Five Customers
Concentration Risk [Line Items]
Concentration risk (as a percent)	11.00%
Top Customer Concentration Risk \| Sales Revenue Net \| Largest Customer
Concentration Risk [Line Items]
Concentration risk (as a percent)	3.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482836/275-10-55-18

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478785/954-310-50-2

+ Details

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

Other Non-Current Assets - Schedule of Other Non-Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Uncertain tax positions (See Note 10)	$ 7,254	$ 5,334
Pension assets (See Note 20)	2,346	2,245
Debt issuance costs (See Note 19)	1,408	2,374
Long-term note receivable	1,030	925
Cost investments	1,835	0
Trust investment	1,491	1,566
Supplemental retirement income program (See Notes 20 and 23)	311	297
Cloud computing implementation costs	2,037	0
Other	2,061	2,593
Total other non-current assets	30,283	17,360
Interest rate swaps
Business Combination [Line Items]
Derivative asset	0	1,621
Net investment hedge
Business Combination [Line Items]
Derivative asset	10,053	0
Houghton
Business Combination [Line Items]
Indemnification assets (See Notes 10 and 21)	$ 457	$ 405

Pension and Other Postretirement Benefits - Schedule of Fair Value Hierarchy - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 114,505	$ 110,608	$ 124,311
Real estate \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,321	2,811	5,918
Insurance contract \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	113,184	107,797	$ 118,393
Fair Value, Recurring
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	191,166	182,511
Fair Value, Recurring \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	188,630	180,476
Fair Value, Recurring \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,417	1,014
Fair Value, Recurring \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	72,708	68,854
Fair Value, Recurring \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114,505	110,608
Fair Value, Recurring \| Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,536	2,035
Fair Value, Recurring \| U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,917	59,548
Fair Value, Recurring \| U.S. \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,917	59,548
Fair Value, Recurring \| U.S. \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| U.S. \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,917	58,454
Fair Value, Recurring \| U.S. \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,094
Fair Value, Recurring \| U.S. \| Pooled separate accounts \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,917	58,454
Fair Value, Recurring \| U.S. \| Pooled separate accounts \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| U.S. \| Pooled separate accounts \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60,917	58,454
Fair Value, Recurring \| U.S. \| Pooled separate accounts \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| U.S. \| Real estate \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,094
Fair Value, Recurring \| U.S. \| Real estate \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| U.S. \| Real estate \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| U.S. \| Real estate \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,094
Fair Value, Recurring \| Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	130,249	122,963
Fair Value, Recurring \| Foreign \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	127,713	120,928
Fair Value, Recurring \| Foreign \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,417	1,014
Fair Value, Recurring \| Foreign \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,791	10,400
Fair Value, Recurring \| Foreign \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114,505	109,514
Fair Value, Recurring \| Foreign \| Real estate \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,717
Fair Value, Recurring \| Foreign \| Real estate \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Real estate \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Real estate \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,717
Fair Value, Recurring \| Foreign \| Cash and cash equivalents \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,417	1,014
Fair Value, Recurring \| Foreign \| Cash and cash equivalents \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,417	1,014
Fair Value, Recurring \| Foreign \| Cash and cash equivalents \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Cash and cash equivalents \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Insurance contract \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	113,184	107,797
Fair Value, Recurring \| Foreign \| Insurance contract \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Insurance contract \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Insurance contract \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	113,184	107,797
Fair Value, Recurring \| Foreign \| Diversified equity securities - registered investment companies \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,625	2,045
Fair Value, Recurring \| Foreign \| Diversified equity securities - registered investment companies \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Diversified equity securities - registered investment companies \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,625	2,045
Fair Value, Recurring \| Foreign \| Diversified equity securities - registered investment companies \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Fixed income – foreign registered investment companies \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,166	8,355
Fair Value, Recurring \| Foreign \| Fixed income – foreign registered investment companies \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Fixed income – foreign registered investment companies \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,166	8,355
Fair Value, Recurring \| Foreign \| Fixed income – foreign registered investment companies \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Recurring \| Foreign \| Other - alternative investments \| Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,321
Fair Value, Recurring \| Foreign \| Other - alternative investments \| Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Recurring \| Foreign \| Other - alternative investments \| Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Fair Value, Recurring \| Foreign \| Other - alternative investments \| Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,321
Fair Value, Recurring \| Foreign \| Commingled funds measured at NAV \| Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 2,536	$ 2,035

Hedging Activities - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Net gain	$ 6,718	$ 2,744	$ 5,689
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Net gain	2,951	0	0
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gain	1,887	4,770	3,555
Other (expense) income, net
Derivative Instruments, Gain (Loss) [Line Items]
Net gain	1,880	(2,026)	$ 2,134
Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized gain deferred to AOCI	6,554	0
Currency Swap \| Other non-current assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value	10,053	0
Currency Swap \| Other non-current liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value	1,541	0
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized gain deferred to AOCI	13	1,248
Interest rate swaps \| Other non-current assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value	0	1,621
Interest rate swaps \| Prepaid expenses and other current assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value	16	0
Foreign currency forward contracts \| Other accrued liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value	$ 5	$ 67

Income Taxes

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

On December 22, 2017, the U.S. government enacted comprehensive tax legislation which we refer to as U.S. Tax Reform. U.S. Tax Reform implemented a new system of taxation for non-U.S. earnings which eliminated U.S. federal income taxes on dividends from certain foreign subsidiaries and imposed a one-time transition tax on the deemed repatriation of undistributed earnings of certain foreign subsidiaries that is payable over eight years. Accordingly, the Company had initially recorded a $15.5 million transition tax liability for U.S. income taxes on undistributed earnings of non-U.S. subsidiaries. As of December 31, 2025, the $15.5 million transition liability has been fully paid. The Company may also be subject to other taxes, such as withholding taxes and dividend distribution taxes, if these undistributed earnings are ultimately remitted to the U.S.

On July 4, 2025, H.R. 1, commonly known as the One Big Beautiful Bill Act (the “OBBB”), was signed into law. The OBBB includes significant changes to the federal corporate tax provisions and extends certain otherwise expiring provisions of the 2017 Tax Cuts and Jobs Act. Among other things, the legislation restores 100% bonus depreciation for eligible property, reinstates expensing for domestic research and experimental expenditures, imposes new limitations on interest expense deductibility, and expands disallowed deductions for certain employee remuneration. The legislation has multiple effective dates, with certain provisions effective in 2025 and other provisions implemented through 2027. The provisions effective in 2025 do not have a material impact to our consolidated financial statements. The Company is continuing to evaluate the potential impacts of the provisions effective in 2026 and 2027.

Taxes on income before equity in net income of associated companies for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
Current:
Federal	$	9,373	$	15,276	$	12,159
State	2,106		2,395		2,938
Foreign	43,556		41,662		51,930
Total	55,035		59,333		67,027
Deferred:
Federal	(11,411)		(4,385)		518
State	(310)		(24)		(163)
Foreign	(18,707)		(5,624)		(11,797)
Total	$	(30,428)	$	(10,033)	$	(11,442)
Taxes on income before equity in net income of associated companies	$	24,607	$	49,300	$	55,585

The components of income before taxes and equity of associated companies for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
U.S.	$	(11,519)	$	17,167	$	14,520
Foreign	18,548		137,891		138,604
Total	$	7,029	$	155,058	$	153,124

Total deferred tax assets and liabilities are composed of the following as of December 31, 2025 and 2024:


	2025		2024
Pension and other postretirement benefits	$	4,426	$	5,472
Allowance for credit losses	2,232		1,895
Insurance and litigation reserves	614		565
Performance incentives	5,291		5,582
Equity-based compensation	3,634		2,891
Prepaid expense	458		426
Operating loss carryforward	32,065		24,702
Foreign tax credit and other credits	23,516		19,516
Interest	22,786		16,423
Restructuring reserves	2,230		158
Right-of-use lease assets	8,790		7,629
Inventory reserves	3,596		2,423
Research and development	14,036		12,608
Other	3,242		1,261
Total deferred tax assets, gross	126,916		101,551
Valuation allowance	(33,376)		(27,993)
Total deferred tax assets, net	$	93,540	$	73,558
Depreciation	14,095		9,814

Intangibles	185,501		170,309
Lease liabilities	9,661		8,575
Outside basis in equity investment	4,500		6,080
Unremitted earnings	8,469		8,392
Total deferred tax liabilities	$	222,226	$	203,170
Total net deferred tax liabilities	$	(128,686)	$	(129,612)

The Company’s net deferred tax assets and liabilities are classified in the Consolidated Balance Sheets as of December 31, 2025 and 2024 as follows:


	2025		2024
Non-current deferred tax assets	$	12,128	$	9,216
Non-current deferred tax liabilities	140,814		138,828
Total net deferred tax liabilities	$	(128,686)	$	(129,612)

As of December 31, 2025, the Company has a deferred tax liability of $8.5 million on certain undistributed foreign earnings, which primarily represents the Company’s estimate of the non-U.S. income taxes the Company will incur to ultimately remit certain earnings to the U.S. Otherwise, it is the Company’s current intention to reinvest its additional undistributed earnings of certain non-U.S. subsidiaries to support working capital needs and certain other growth initiatives outside of the U.S. The amount of such undistributed earnings at December 31, 2025 was approximately $429.2 million. Any tax liability which might result from ultimate remittance of these earnings is expected to be substantially offset by foreign tax credits (“FTCs”) (subject to certain limitations); however, certain withholding taxes could apply. It is currently impractical to estimate any such incremental tax expense.

The Company has $6.0 million of deferred tax assets related to state net operating losses. Management analyzed the expected impact of the reversal of existing taxable temporary differences, considered expiration dates, analyzed current state tax laws, and determined that $1.6 million of state net operating loss carryforwards is expected to be realized as a future benefit. Accordingly, a partial valuation allowance of $4.4 million has been established. These state net operating losses are subject to various carryforward periods of 5 years to 20 years or an indefinite carryforward period. An additional $0.9 million of valuation allowance was established for other net state deferred tax assets.

The Company has $26.6 million of deferred tax assets related to foreign net operating loss carryforwards. A partial valuation allowance of $3.7 million has been established against this amount resulting in a net $22.9 million expected future benefit. These foreign net operating losses are subject to various carryforward periods with the majority having an indefinite carryforward period. An additional partial valuation allowance of $3.7 million has been established against certain other foreign deferred tax assets.

FTCs may be carried forward for 10 years. Management analyzed the expected impact of the utilization of FTCs based on certain assumptions such as projected U.S. taxable income, overall domestic loss recapture, and applicable limitations if any. The Company had an FTCs carry forward of $23.1 million and $19.2 million as of December 31, 2025 and 2024, respectively, with a $20.6 million and $17.2 million valuation allowance as of December 31, 2025 and 2024, respectively, reflecting the amount of credits that are not expected to be utilized before expiration.

The following are the changes in the Company’s deferred tax asset valuation allowance for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023

Balance at January 1,	$	27,993	$	24,182	$	11,730
Net charges to income tax expense	$	5,281	$	5,693	$	14,393
Release of valuation allowance	$	(1,228)	$	(1,882)	$	(1,941)
Purchase accounting adjustments	$	1,330	$	—	$	—
Balance at December 31,	$	33,376	$	27,993	$	24,182

Payments for income taxes including withholding taxes, net for the year ended December 31, 2025 are as follows ($ in thousands):


	2025
U.S. Federal	$	7,163
U.S. State (1)	2,090
Foreign
Brazil	11,592
China	15,040

India	3,422
Mexico	9,149

Other	11,255
Total income taxes paid, net	$	59,711

(1) During the year ended December 31, 2025, there were no individual state jurisdictions with cash taxes paid that equaled or exceeded 5% of total income taxes paid.

Payments for income taxes including withholding taxes, net for the years ended December 31, 2024 and 2023 was $69.0 million and $68.6 million, respectively.

The following is a reconciliation of income taxes at the Federal statutory rate with income taxes recorded by the Company for the year ended December 31, 2025:


	2025
	Total			%
Income tax provision at the Federal statutory tax rate	1,476			21.0	%
State and local income taxes, net of federal (1)	1,351		$—	19.2	%
Effect of cross-border tax laws
Global Intangible Low-Taxed Income (GILTI), net of FTC's	2,100			29.9	%
Foreign-Derived Intangible Income (FDII)	(1,180)			(16.8)	%
Foreign branch income, net of FTC's	(5,060)			(72.0)	%
Subpart F income, net of FTC's	182			2.6	%
Other Cross-Border Tax	224			3.2	%
Tax Credits
R&D	(566)			(8.1)	%
Changes in valuation allowances	3,480			49.5	%
Nontaxable or nondeductible items
Share-based compensation	1,642			23.4	%
Other nontaxable or nondeductible items	254			3.6	%
Other adjustments
Other	(852)			(12.1)	%
Change in unrecognized tax benefits	(5,708)			(81.2)	%
Foreign tax effects:
Brazil
Statutory income tax rate differential	2,949			42.0	%
Other	(198)			(2.8)	%
China
Withholding taxes	4,100			58.3	%
R&D deduction	(1,402)			(19.9)	%
Other	266			3.8	%
France
Non-deductible impairment	3,197			45.5	%
Other	(229)			(3.3)	%
Germany
Non-deductible impairment	5,257			74.8	%
Other	(835)			(11.9)	%
Korea
Withholding taxes	1,760			25.0	%
Malta
Statutory income tax rate differential	(3,166)			(45.0)	%
Other	1,009			14.4	%
Mexico
Statutory income tax rate differential	1,896			27.0	%
Other	599			8.5	%
Netherlands
Other	2,060			29.3	%
Spain
Non-deductible impairment	1,605			22.8	%
Other	141			2.0	%
United Kingdom
Non-deductible impairment	2,451			34.9	%
Other	3			—	%
Other foreign jurisdictions	5,801			82.5	%

Effective Tax Rate	$	24,607		350.1	%

(1) During the year ended December 31, 2025, state taxes in Indiana, Pennsylvania, and Michigan comprised greater than 50% of the tax effect in this category.

The following is a reconciliation of income taxes at the Federal statutory rate with income taxes recorded by the Company for the years ended December 31, 2024 and 2023:


	2024		2023
Income tax provision at the Federal statutory tax rate	$	32,562	$	32,156
Unremitted earnings	(30)		1,211
Tax law changes / reform	(37)		47
U.S. tax on foreign operations	9,625		9,014

Foreign derived intangible income	(1,336)		(1,147)

Withholding taxes	8,418		11,193
FTC's	(6,898)		(3,432)
Share-based compensation	2,345		1,814
Foreign tax rate differential	1,315		4,731
Research and development credit	(1,902)		(2,000)
Audit settlements	—		456
Uncertain tax positions	(2,372)		(598)
State income tax provisions, net	1,905		2,158
Non-deductible expenses	341		416
Intercompany transfer of intangible assets	2,295		(584)
Goodwill impairment	—		—
Provision to return and other adjustments	2,655		(930)
Miscellaneous items, net	414		1,080
Taxes on income before equity in net income of associated companies	$	49,300	$	55,585

For the years ended December 31, 2025 and 2024, the Company’s cumulative liability for gross unrecognized tax benefits were $12.4 million and $13.9 million, respectively. For the years ended December 31, 2025 and 2024, the Company had accrued approximately $0.0 million and $0.8 million, respectively, for cumulative penalties and $1.8 million and $2.6 million, respectively, for cumulative interest.

The Company continues to recognize interest and penalties associated with uncertain tax positions as a component of tax expense on income before equity in net income of associated companies in its Consolidated Statements of Operations. The Company recognized a benefit of $0.8 million for penalties and a benefit of $0.8 million for interest (net of expirations and settlements) in its Consolidated Statements of Operations for the year ended December 31, 2025, a benefit of $0.2 million for penalties and a benefit of $0.2 million for interest (net of expirations and settlements) in its Consolidated Statement of Operations for the year ended December 31, 2024, and a benefit of $0.4 million for penalties and an expense of $0.1 million for interest (net of expirations and settlements) in its Consolidated Statement of Operations for the year ended December 31, 2023.

A reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended December 31, 2025, 2024 and 2023, respectively, is as follows:


	2025		2024		2023
Unrecognized tax benefits as of January 1	$	13,949	$	15,659	$	16,340
Decrease in unrecognized tax benefits taken in prior periods	(1,351)		(88)		(147)
Increase in unrecognized tax benefits taken in current period	4,011		2,684		1,799
Decrease in unrecognized tax benefits due to lapse of statute of limitations	(4,954)		(3,559)		(2,736)
Decrease in unrecognized tax benefits due to audit settlements	(506)		—		—

Increase (decrease) due to foreign exchange rates	1,230		(747)		403
Unrecognized tax benefits as of December 31	$	12,379	$	13,949	$	15,659

The amount of net unrecognized tax benefits above that, if recognized, would impact the Company’s tax expense and effective tax rate is $4.9 million, $8.3 million and $10.1 million for the years ended December 31, 2025, 2024 and 2023, respectively.

The Company and its subsidiaries are subject to U.S. Federal income tax, as well as the income tax of various state and foreign tax jurisdictions. Tax years that remain subject to examination by major tax jurisdictions are shown in the table below:


Jurisdiction						Open Years
Brazil						2020-2025
China						2020-2025
Germany						2019-2025
India						2020-2025
Italy						2019-2025
Mexico						2020-2025
Netherlands						2020-2025
Spain						2019-2025
U.S. Federal and State						2020-2025
United Kingdom						2021-2025

Positions challenged by the taxing authorities may be settled or applied by the Company.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
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-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
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-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Section 50
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-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024 were as follows:


	Americas		EMEA		Asia/Pacific		Total
Balance as of December 31, 2023	283,103		65,940		163,475		512,518
Goodwill recognized for Sutai acquisition	—		—		5,511		5,511
Goodwill recognized for IKV	—		16,448		—		16,448
Currency translation adjustments	(6,228)		(1,984)		(7,371)		(15,583)
Balance as of December 31, 2024	276,875		80,404		161,615		518,894
Goodwill recognized for Dipsol acquisition	5,770		380		46,909		53,059
Goodwill recognized for Natech acquisition	—		2,625		—		2,625
Goodwill recognized for CSI acquisition	—		1,721		—		1,721
Goodwill recognized for Sutai acquisition (1)	—		—		(233)		(233)
Currency translation adjustments	4,383		3,710		6,401		14,494
Goodwill impairments	—		(88,840)		—		(88,840)
Balance as of December 31, 2025	$	287,028	$	—	$	214,692	$	501,720

(1) During the year ended December 31, 2025, the Company finalized the working capital settlements which impacted the goodwill recorded. See Note 2, Business Combinations, for additional information.


	2025		2024		2023
Goodwill, gross	$	694,311	$	611,498	$	609,571
Accumulated impairment losses (1)	(192,591)		(92,604)		(97,053)
Goodwill, net	$	501,720	$	518,894	$	512,518

(1) Accumulated impairment losses are attributable to the non-cash impairment charges of $88.8 million and $93.0 million to write down the carrying value of the EMEA reporting unit during the second quarter of 2025 and fourth quarter of 2022, respectively. These amounts include the impact of currency translation.

Gross carrying amounts and accumulated amortization for definite-lived intangible assets as of December 31, 2025 and 2024 were as follows:


	Gross Carrying Amount				Accumulated Amortization				Net Book Value
	2025		2024		2025		2024		2025		2024
Customer lists and rights to sell	$	901,662	$	829,255	$	351,859	$	285,450	$	549,803	$	543,805
Trademarks, formulations and product technology	199,434		160,257		77,521		62,373		121,913		97,884
Other	6,871		5,759		6,236		5,663		635		96
Total definite-lived intangible assets	$	1,107,967	$	995,271	$	435,616	$	353,486	$	672,351	$	641,785

The Company recorded $63.0 million, $58.2 million and $58.2 million of amortization expense during the years ended December 31, 2025, 2024 and 2023, respectively. Amortization expense is recorded within SG&A in the Company’s Consolidated Statements of Operations. Estimated annual aggregate amortization expense for the subsequent five years is as follows:


For the year ended December 31, 2026	$	64,010
For the year ended December 31, 2027	63,670
For the year ended December 31, 2028	63,195
For the year ended December 31, 2029	62,045
For the year ended December 31, 2030	60,897

As of December 31, 2025 and December 31, 2024, the Company had indefinite-lived intangible assets for trademarks and tradenames totaling $201.2 million and $185.3 million, respectively.

The Company completes its annual goodwill and indefinite-lived intangible asset impairment tests during the fourth quarter of each year, or more frequently if triggering events indicate a possible impairment in one or more of its reporting units. During the second quarter of 2025, the Company concluded that the negative impacts of the lower than projected financial performance, driven by the continuation of soft end market conditions, as well as an increase in the Company’s cost of capital, driven by uncertainty around the potential negative impacts of tariffs, represented a triggering event for the Company’s EMEA reporting unit and the associated goodwill, as well as the related asset group. As a result of this conclusion, the Company completed an interim quantitative impairment assessment as of June 30, 2025 for its EMEA reporting unit and the related asset group. The Company concluded that the undiscounted cash flows exceeded the carrying value of the EMEA asset group, and therefore that the long-lived assets are not impaired. In completing a quantitative goodwill impairment test, the Company compares the reporting unit’s fair value, based on future discounted cash flows, to its carrying value in order to determine if an impairment of goodwill exists. The estimates of future discounted cash flows involve considerable judgment and are based upon certain significant assumptions including the weighted average cost of capital (“WACC”) as well as projected EBITDA, which includes assumptions related to revenue growth rates, gross margin levels and operating expenses. As a result of the impact of the uncertainty around tariffs, and continued soft end market conditions driving lower current year EMEA earnings and a decline in projected future EMEA earnings, as well as an increase in the WACC assumption utilized in the Company’s 2024 annual impairment assessment, the Company concluded that the estimated fair value of the EMEA reporting unit was less than its carrying value. As a result, a pre-tax, non-cash impairment charge of $88.8 million ($86.7 million after-tax) to write down the remaining carrying value amount of the EMEA reporting unit Goodwill was recorded in the second quarter of 2025, reflected in “Impairment charges” in the Consolidated Statements of Operations for the year ended December 31, 2025.

Other Non-Current Assets

12 Months Ended

Dec. 31, 2025

Other Assets [Abstract]

Other Non-Current Assets

Other non-current assets as of December 31, 2025 and 2024 were as follows:


	2025		2024
Uncertain tax positions (See Note 10)	$	7,254	$	5,334
Pension assets (See Note 20)	2,346		2,245
Debt issuance costs (See Note 19)	1,408		2,374
Interest rate swap (See Note 24)	—		1,621
Net investment hedge (See Note 24)	10,053		—
Long-term note receivable	1,030		925
Cost investments	1,835		—
Trust investment	1,491		1,566
Indemnification assets (See Notes 10 and 21)	457		405
Supplemental retirement income program (See Notes 20 and 23)	311		297
Cloud computing implementation costs	2,037		—
Other	2,061		2,593
Total other non-current assets	$	30,283	$	17,360

As of December 31, 2025 and 2024, three and two of the Company’s foreign pension plans’ fair value of plan assets exceeded its gross benefit obligation, respectively, and were therefore over-funded for both years, which is presented within Pension assets in the table above. See Note 20 for additional information.

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment as of December 31, 2025 and 2024 were as follows:


	2025		2024
Land	$	35,651	$	25,143
Building and improvements	178,248		149,783
Machinery and equipment	321,879		272,188
Construction in progress	69,009		35,919
Property, plant and equipment, at cost	604,787		483,033
Less: accumulated depreciation	(291,364)		(253,501)
Total property, plant and equipment, net	$	313,423	$	229,532

Business Acquisitions - Narrative (Details) $ in Thousands, ¥ in Billions		1 Months Ended					12 Months Ended
	Apr. 01, 2025 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 JPY (¥)	Feb. 28, 2025 USD ($)	Jul. 31, 2024 USD ($)	Feb. 29, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business Combination [Line Items]
Payments related to acquisitions							$ 164,209	$ 39,302	$ 0
Goodwill							501,720	518,894	512,518
Acquisition-related earnout liability							1,541	0
Earnout liability adjustment							454	400	0
Combination, integration and other acquisition-related expenses							12,000	1,900	0
Operating Segments \| Asia/Pacific
Business Combination [Line Items]
Goodwill							214,692	161,615	163,475
Operating Segments \| Americas
Business Combination [Line Items]
Goodwill							287,028	276,875	283,103
Operating Segments \| EMEA
Business Combination [Line Items]
Goodwill							0	$ 80,404	$ 65,940
Dipsol
Business Combination [Line Items]
Percentage of voting interests acquired	100.00%
Purchase price		$ 185,600	¥ 27.7
Cash acquired from acquisition		30,100	4.5
Payments related to acquisitions		155,500	¥ 23.2
Cash payments to acquire businesses		$ 187,000
Measurement period	1 year
Other intangible assets	$ 55,000
Goodwill	53,059
Total sales							62,700
Total loss							5,400
Depreciation expense							4,900
Cash and cash equivalents	30,084
Dipsol \| Operating Segments \| Asia/Pacific
Business Combination [Line Items]
Other intangible assets	51,300
Goodwill	46,900
Dipsol \| Operating Segments \| Americas
Business Combination [Line Items]
Other intangible assets	3,500
Goodwill	5,800
Dipsol \| Operating Segments \| EMEA
Business Combination [Line Items]
Other intangible assets	200
Goodwill	400
Dipsol \| Customer Relationships
Business Combination [Line Items]
Other intangible assets	30,000
Intangible assets, amortizable life		14 years	14 years
Dipsol \| Customer Relationships \| Operating Segments \| Asia/Pacific
Business Combination [Line Items]
Other intangible assets	26,300
Dipsol \| Customer Relationships \| Operating Segments \| Americas
Business Combination [Line Items]
Other intangible assets	3,500
Dipsol \| Customer Relationships \| Operating Segments \| EMEA
Business Combination [Line Items]
Other intangible assets	200
Dipsol \| Product Technologies
Business Combination [Line Items]
Other intangible assets	18,000
Intangible assets, amortizable life		8 years	8 years
Dipsol \| Product Technologies \| Operating Segments \| Asia/Pacific
Business Combination [Line Items]
Other intangible assets	18,000
Dipsol \| Product Technologies \| Operating Segments \| Americas
Business Combination [Line Items]
Other intangible assets	0
Dipsol \| Product Technologies \| Operating Segments \| EMEA
Business Combination [Line Items]
Other intangible assets	0
Dipsol \| Trademarks
Business Combination [Line Items]
Other intangible assets	7,000
Intangible assets, amortizable life		13 years	13 years
Dipsol \| Trademarks \| Operating Segments \| Asia/Pacific
Business Combination [Line Items]
Other intangible assets	7,000
Dipsol \| Trademarks \| Operating Segments \| Americas
Business Combination [Line Items]
Other intangible assets	0
Dipsol \| Trademarks \| Operating Segments \| EMEA
Business Combination [Line Items]
Other intangible assets	0
Dipsol \| Interest rate swaps
Business Combination [Line Items]
Loss relating to the change in fair value of instruments							1,400
Natech
Business Combination [Line Items]
Percentage of voting interests acquired		100.00%	100.00%
Purchase price		$ 6,500
Cash acquired from acquisition		1,500
Cash payments to acquire businesses		6,000
Other intangible assets	2,100
Goodwill	$ 2,600
Deferred payment		$ 500
CSI
Business Combination [Line Items]
Percentage of voting interests acquired				100.00%
Purchase price				$ 3,900
Other intangible assets				1,400
Goodwill				$ 1,700
Sutai Group
Business Combination [Line Items]
Percentage of voting interests acquired					100.00%
Purchase price					$ 16,200
Cash payments to acquire businesses					14,600
Other intangible assets					3,100
Goodwill					5,500
Acquisition-related earnout liability					1,600
Cash and cash equivalents					5,500
Earnout liability adjustment							$ 800
I.K.V. Tribologie IKVT
Business Combination [Line Items]
Percentage of voting interests acquired						100.00%
Purchase price						$ 35,200
Cash payments to acquire businesses						29,700
Other intangible assets						15,000
Goodwill						16,400
Acquisition-related earnout liability					$ 5,500
Cash and cash equivalents						4,800
I.K.V. Tribologie IKVT \| Customer Relationships
Business Combination [Line Items]
Other intangible assets						$ 11,100
Intangible assets, amortizable life						16 years
I.K.V. Tribologie IKVT \| Product Technologies
Business Combination [Line Items]
Other intangible assets						$ 3,200
Intangible assets, amortizable life						14 years
I.K.V. Tribologie IKVT \| Trademarks
Business Combination [Line Items]
Other intangible assets						$ 700
Intangible assets, amortizable life						5 years

Basis of Presentation and Significant Accounting Policies - Capitalized Software (Details) - Software Development - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Capitalized computer software, net	$ 2.3	$ 2.9
Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years

Business Segments - Schedule of Reconciliation of Segment Operating Earnings to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2025	Dec. 31, 2022	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting [Abstract]
Segment operating earnings			$ 448,432	$ 466,121	$ 489,305
Restructuring and related charges, net			(35,130)	(6,530)	(7,588)
Impairment charges	$ (88,800)	$ (93,000)	(88,840)	0	0
Non-operating and administrative expenses			(205,651)	(203,956)	(206,398)
Depreciation of corporate assets and amortization			(65,825)	(60,929)	(60,824)
Operating income			52,986	194,706	214,495
Other (expense) income, net			(1,909)	1,354	(10,672)
Interest expense			(44,048)	(41,002)	(50,699)
Income before taxes and equity in net income of associated companies			$ 7,029	$ 155,058	$ 153,124

Pension and Other Postretirement Benefits - Schedule of Information About Accumulated and Projected Benefit Obligations In Excess of Plan Assets (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	$ 18,562	$ 146,206
Fair value of plan assets	2,536	126,386
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligation	91,977	151,284
Fair value of plan assets	70,481	126,386
Foreign
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	7,207	72,836
Fair value of plan assets	2,536	66,838
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligation	80,464	77,914
Fair value of plan assets	70,481	66,838
U.S.
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	11,355	73,370
Fair value of plan assets	0	59,548
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Projected benefit obligation	11,513	73,370
Fair value of plan assets	$ 0	$ 59,548

Investments in Associated Companies - Schedule of Equity Method Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Total equity in net income of associated companies	$ 15,177	$ 10,971	$ 15,333
Houghton Korea
Total equity in net income of associated companies	9,185	6,795	11,442
Nippon Japan
Total equity in net income of associated companies	1,085	925	1,492
Kelko Panama
Total equity in net income of associated companies	370	321	309
SKT
Total equity in net income of associated companies	265	0	0
Primex
Total equity in net income of associated companies	$ 4,272	$ 2,930	$ 2,090

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References + Details

Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

Open foreign exchange forward contracts as of December 31, 2025 were entered into as hedges of Japanese yen and Mexican peso against the U.S. dollar and had the following notional U.S. dollar values:


Currency	December 31, 2025
Mexican Peso	$	12,500
Japanese Yen	15,300
Total	$	27,800

Schedule of Balance Sheet Classification and Fair Values of Derivative Instruments

The balance sheet classification and fair values of the Company’s derivative instruments are as follows:


Derivative instruments	Consolidated Balance Sheet Location	December 31,
		2025		2024

Net investment hedges	Other non-current assets	$	10,053	$	—
Net investment hedges	Other non-current liabilities	1,541		—
Interest rate swaps	Prepaid expenses and other current assets	16		—
Interest rate swaps	Other non-current assets	—		1,621
Foreign currency forward contracts	Other accrued liabilities	5		67

The following table presents the net unrealized gain deferred to AOCI:


		December 31,
Derivative instruments:	Consolidated Balance Sheet Location	2025		2024
Net investment hedges	AOCI	$	6,554	$	—
Interest rate swaps	AOCI	13		1,248

The following table presents the net gain (loss) recognized in the Company’s Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


		For the Years Ended December 31,
Derivative instruments	Condensed Consolidated Statements of Operations	2025		2024		2023
Net investment hedges	Interest expense	$	2,951	$	—	$	—
Interest rate swaps	Interest expense	1,887		4,770		3,555
Foreign exchange forward contracts	Other (expense) income, net	1,880		(2,026)		2,134
Total		$	6,718	$	2,744	$	5,689

Business Acquisitions (Tables)

12 Months Ended

Dec. 31, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Schedule of Business Combination

The following table presents the preliminary estimated fair values of Dipsol assets acquired and liabilities assumed as of the acquisition date:


Dipsol Assets Acquired and Liabilities Assumed Dollars in thousands	Estimated Fair Value (1)
Fair value of assets acquired
Cash and cash equivalents	$	30,084
Accounts receivable	16,481
Inventories	17,962
Prepaid expenses and other current assets	1,231
Property, plant and equipment	39,450
Right-of-use lease assets	2,534
Other intangible assets	55,000
Investments in associated companies	5,096
Deferred tax assets	989
Other non-current assets	4,165
Total Assets Acquired	$	172,992
Fair value of liabilities assumed
Accounts payable	$	6,763
Accrued compensation	1,528
Other accrued liabilities	2,415
Long-term lease liabilities	1,446
Deferred income tax liabilities	25,836
Total Liabilities Assumed	$	37,988
Noncontrolling interest	(2,451)
Goodwill	53,059
Total Consideration	$	185,612

Schedule of Intangible Assets Recognized

The following table presents the intangible assets recognized for each reportable segment:


	Americas		EMEA		Asia/Pacific		Total
Customer Relationships	$	3,500	$	200	$	26,300	$	30,000
Product Technologies	—		—		18,000		18,000
Trademarks	—		—		7,000		7,000
Total Intangibles	$	3,500	$	200	$	51,300	$	55,000

- Definition

Tabular disclosure of business combination. Includes, but is not limited to, recognized asset and liability.

+ References + Details

Basis of Presentation and Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)	Dec. 31, 2025
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	24 years

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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-Name Accounting Standards Codification
-Section 55
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+ Details

Commitments and Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Business interruption insurance proceeds	$ 1,000	$ 0	$ 1,000	$ 0
Houghton environmental matters
Other Commitments [Line Items]
Loss contingency accrual		3,400	3,600
Asbestos claims
Other Commitments [Line Items]
Loss contingency accrual		$ 500	$ 600

Equity - Schedule of Activity of Nonvested Awards (Details) - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025
Restricted Stock
Number of Shares
Balance at the beginning (in shares)		29,751
Granted (in shares)		0
Vested (in shares)		22,777
Forfeited (in shares)		2,705
Balance at the ending (in shares)	29,751	4,269
Weighted Average Grant Date Fair Value (per share)
Nonvested awards, beginning balance (in dollars per share)		$ 177.12
Granted (in dollars per share)		0
Vested (in dollars per share)		178.94
Forfeited (in dollars per share)		165.66
Nonvested awards, ending balance (in dollars per share)	$ 177.12	$ 174.72
Restricted Stock Units (RSUs)
Number of Shares
Balance at the beginning (in shares)		68,630
Granted (in shares)	9,820	84,479
Vested (in shares)		32,004
Forfeited (in shares)		10,059
Balance at the ending (in shares)	68,630	111,046
Weighted Average Grant Date Fair Value (per share)
Nonvested awards, beginning balance (in dollars per share)		$ 182.90
Granted (in dollars per share)		125.35
Vested (in dollars per share)		154.21
Forfeited (in dollars per share)		151.42
Nonvested awards, ending balance (in dollars per share)	$ 182.90	$ 150.24
Performance stock units
Number of Shares
Balance at the beginning (in shares)		55,693
Granted (in shares)		56,347
Vested (in shares)		0
Forfeited (in shares)		7,967
Balance at the ending (in shares)	55,693	104,073
Weighted Average Grant Date Fair Value (per share)
Nonvested awards, beginning balance (in dollars per share)		$ 216.51
Granted (in dollars per share)		139.67
Vested (in dollars per share)		0
Forfeited (in dollars per share)		120.62
Nonvested awards, ending balance (in dollars per share)	$ 216.51	$ 195.42

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2025
Audit Information [Abstract]
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Philadelphia, Pennsylvania

Pension and Other Postretirement Benefits

12 Months Ended

Dec. 31, 2025

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefits

The following table shows the funded status of the Company’s plans’ reconciled with amounts reported in the Consolidated Balance Sheets as of December 31, 2025 and 2024:


	Pension Benefits												Other Post- Retirement Benefits
	2025						2024						2025		2024
	Foreign		U.S.		Total		Foreign		U.S.		Total		U.S.		U.S.
Change in benefit obligation
Gross benefit obligation at beginning of year	$	131,794	$	73,370	$	205,164	$	144,779	$	79,063	$	223,842	$	1,213	$	1,343
Service cost	436		—		436		417		—		417		—		—
Interest cost	5,902		3,571		9,473		5,817		3,672		9,489		61		61


Curtailment gain	—		—		—		(19)		—		(19)		—		—
Plan settlements	(689)		—		(689)		—		—		—		—		—
Benefits paid	(6,674)		(6,488)		(13,162)		(6,377)		(6,519)		(12,896)		(253)		(156)
Plan expenses and premiums paid	(62)		—		(62)		(36)		—		(36)		—		—

Actuarial (gain) loss	(6,716)		1,852		(4,864)		(6,589)		(2,845)		(9,434)		210		(61)
Translation differences and other	14,034		—		14,034		(6,198)		(1)		(6,199)		—		26
Gross benefit obligation at end of year	$	138,025	$	72,305	$	210,330	$	131,794	$	73,370	$	205,164	$	1,231	$	1,213


	Pension Benefits												Other Post- Retirement Benefits
	2025						2024						2025		2024
	Foreign		U.S.		Total		Foreign		U.S.		Total		U.S.		U.S.
Change in plan assets
Fair value of plan assets at beginning of year	$	122,963	$	59,548	$	182,511	$	135,387	$	60,967	$	196,354	$	—	$	—
Actual return on plan assets	(1,445)		5,263		3,818		(3,003)		1,349		(1,654)		—		—
Employer contributions	3,397		2,594		5,991		2,043		3,751		5,794		253		156

Plan settlements	(689)		—		(689)		—		—		—		—		—
Benefits paid	(6,674)		(6,488)		(13,162)		(6,377)		(6,519)		(12,896)		(253)		(156)
Plan expenses and premiums paid	(62)		—		(62)		(36)		—		(36)		—		—
Translation differences	12,759		—		12,759		(5,051)		—		(5,051)		—		—
Fair value of plan assets at end of year	$	130,249	$	60,917	$	191,166	$	122,963	$	59,548	$	182,511	$	—	$	—
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)

Amounts recognized in the balance sheet consist of:
Non-current assets	$	2,209	$	137	$	2,346	$	2,245	$	—	$	2,245	$	—	$	—
Current liabilities	(405)		(1,542)		(1,947)		(400)		(1,758)		(2,158)		(179)		(170)
Non-current liabilities	(9,580)		(9,983)		(19,563)		(10,676)		(12,064)		(22,740)		(1,052)		(1,043)
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)
Amounts not yet reflected in net periodic benefit costs and included in accumulated other comprehensive loss:
Prior service cost	(280)		—		(280)		(265)		—		(265)		—		—
Accumulated (loss) gain	(21,672)		4,629		(17,043)		(19,775)		3,905		(15,870)		896		1,199

AOCI	(21,952)		4,629		(17,323)		(20,040)		3,905		(16,135)		896		1,199
Cumulative employer contributions in excess of or (below) net periodic benefit cost	14,176		(16,017)		(1,841)		11,209		(17,727)		(6,518)		(2,127)		(2,412)
Net benefit obligation recognized	$	(7,776)	$	(11,388)	$	(19,164)	$	(8,831)	$	(13,822)	$	(22,653)	$	(1,231)	$	(1,213)

The accumulated benefit obligation for all defined benefit pension plans was $204.8 million ($72.3 million U.S. and $132.5 million Foreign) and $199.9 million ($73.4 million U.S. and $126.5 million Foreign) as of December 31, 2025 and 2024, respectively.

Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	2025			2024
	Foreign	U.S.	Total	Foreign	U.S.	Total
Accumulated benefit obligation	7,207	11,355	18,562	72,836	73,370	146,206
Fair value of plan assets	2,536	—	2,536	66,838	59,548	126,386

Information for pension plans with a projected benefit obligation in excess of plan assets:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Projected benefit obligation	$	80,464	$	11,513	$	91,977	$	77,914	$	73,370	$	151,284
Fair value of plan assets	70,481		—		70,481		66,838		59,548		126,386

Components of net periodic benefit costs – pension plans:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Service cost	$	436	$	—	$	436	$	417	$	—	$	417
Interest cost	5,902		3,571		9,473		5,817		3,672		9,489
Expected return on plan assets	(5,537)		(2,710)		(8,247)		(5,571)		(2,562)		(8,133)
Settlement gain	(136)		—		(136)		—		—		—
Curtailment gain	—		—		—		(19)		—		(19)
Actuarial loss amortization	572		23		595		481		24		505
Prior service cost amortization	24		—		24		27		(1)		26
Net periodic benefit cost	$	1,261	$	884	$	2,145	$	1,152	$	1,133	$	2,285


	2023
	Foreign		U.S.		Total
Service cost	$	399	$	28	$	427
Interest cost	6,083		3,849		9,932
Expected return on plan assets	(5,271)		(2,799)		(8,070)

Curtailment (gain) loss	(213)		15		(198)
Actuarial loss amortization	388		22		410
Prior service cost amortization	28		6		34
Net periodic benefit costs	$	1,414	$	1,121	$	2,535

Other changes recognized in other comprehensive income – pension plans:


	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
Net loss (gain) arising during the period	$	266	$	(701)	$	(435)	$	1,985	$	(1,631)	$	354


Settlement gain (loss)	130		—		130		—		(24)		(24)

Actuarial loss	(566)		(26)		(592)		(481)		—		(481)
Curtailment recognition	(24)		3		(21)		(27)		—		(27)
Effect of exchange rates on amounts included in AOCI	2,105		—		2,105		(908)		—		(908)
Total recognized in other comprehensive loss (income)	1,911		(724)		1,187		569		(1,655)		(1,086)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$	3,172	$	160	$	3,332	$	1,721	$	(521)	$	1,200


	2023
	Foreign		U.S.		Total
Net loss arising during period	$	8,605	$	398	$	9,003
Settlement loss	—		(23)		(23)
Prior service cost	—		(15)		(15)
Actuarial loss	(388)		(92)		(480)
Curtailment recognition	(28)		—		(28)
Effect of exchange rates on amounts included in AOCI	560		—		560
Total recognized in other comprehensive loss	8,749		268		9,017
Total recognized in net periodic benefit cost and other comprehensive loss	$	10,163	$	1,389	$	11,552

Components of net periodic benefit costs – other postretirement plan:


	2025		2024		2023

Interest cost	61		61		69
Actuarial gain amortization	(94)		(102)		(128)
Prior service credit amortization	—		—		(16)
Net periodic benefit costs	$	(33)	$	(41)	$	(75)

Other changes recognized in other comprehensive income – other postretirement benefit plans:


	2025		2024		2023
Net (loss) gain arising during period	$	210	$	(61)	$	(150)
Recognition of amortizations in net periodic benefit cost	—		—		—
Prior service credit	—		—		16
Actuarial gain amortization	94		102		127
Total recognized in other comprehensive loss (income)	304		41		(7)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$	271	$	—	$	(82)

Weighted-average assumptions used to determine benefit obligations as of December 31, 2025 and 2024:


	Pension Benefits		Other Postretirement Benefits
	2025	2024	2025	2024
U.S. Plans
Discount rate	5.21%	5.49%	4.88%	5.34%
Rate of compensation increase	N/A	N/A	N/A	N/A

Foreign Plans
Discount rate	4.91%	4.64%	N/A	N/A
Rate of compensation increase	3.19%	3.33%	N/A	N/A

Weighted-average assumptions used to determine net periodic benefit costs for the years ended December 31, 2025, 2024 and 2023:


	Pension Benefits						Other Postretirement Benefits
	2025		2024		2023		2025		2024		2023
U.S. Plans
Discount rate	5.49	%	4.94	%	5.21	%	5.32	%	4.87	%	5.15	%
Expected long-term return on plan assets	5.75	%	5.50	%	5.50	%	N/A		N/A		N/A
Rate of compensation increase	N/A		N/A		N/A		N/A		N/A		N/A

Foreign Plans
Discount rate	4.53	%	4.33	%	4.77	%	N/A		N/A		N/A
Expected long-term return on plan assets	4.28	%	4.20	%	4.03	%	N/A		N/A		N/A
Rate of compensation increase	3.30	%	3.26	%	3.38	%	N/A		N/A		N/A

The long-term rates of return on assets were selected from within the reasonable range of rates determined by (a) historical real returns for the asset classes covered by the investment policy and (b) projections of inflation over the long-term period during which benefits are payable to plan participants. See Note 1, Basis of Presentation and Significant Accounting Policies, for additional information.

Assumed health care cost trend rates as of December 31, 2025, 2024 and 2023:


	2025		2024		2023
Health care cost trend rate for next year	7.65	%	7.05	%	6.87	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.00	%	4.00	%	4.00	%
Year that the rate reaches the ultimate trend rate	2050		2049		2048

Plan Assets and Fair Value

The Company’s pension plan target asset allocation and the weighted-average asset allocations as of December 31, 2025 and 2024 by asset category were as follows:


Asset Category	Target		2025		2024
U.S. Plans
Equity securities	20	%	21	%	27	%
Debt securities	80	%	79	%	71	%
Other	—	%	—	%	2	%
Total	100	%	100	%	100	%

Foreign Plans
Equity securities	17	%	21	%	18	%
Debt securities	68	%	61	%	62	%
Other	15	%	18	%	20	%
Total	100	%	100	%	100	%

As of December 31, 2025 and 2024, “Other” consisted principally of cash and cash equivalents, and investments in real estate funds.

The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the fair value hierarchy, where applicable (refer to Note 1, Basis of Presentation and Significant Accounting Policies, for a definition of the levels of the fair value hierarchy):

Cash and Cash Equivalents

Cash and cash equivalents consist of cash and money market funds and are classified as Level 1 investments.

Commingled Funds

Investments in the U.S. pooled separate accounts consist primarily of mutual funds, each of which follows a separate investment strategy, and are valued based on the reported unit value at year end. Foreign pension plan commingled funds represent pooled institutional investments, including primarily collective investment trusts. These commingled funds are not available on an exchange or in an active market and these investments are valued using their net asset value (“NAV”), which is generally based on the underlying asset values of the investments held in the trusts. As of December 31, 2025, the foreign pension plan commingled funds included approximately 37 percent of investments in equity securities, 48 percent of investments in fixed income securities, and 15 percent of other non-related investments, primarily real estate. As of December 31, 2024, the foreign pension plan commingled funds also included approximately 37 percent of investments in equity securities, 48 percent of investments in fixed income securities, and 15 percent of other non-related investments, primarily real estate.

Pooled Separate Accounts

Investments in the U.S. pension plan pooled separate accounts consist of annuity contracts and are valued based on the reported unit value at year end. Units of the pooled separate account are not traded on an exchange or in an active market; however, valuation is based on the underlying investments of each pooled separate account and are classified as Level 2 investments. As of December 31, 2025, the U.S. pension plan pooled separate accounts included approximately 21 percent of investments in equity securities and 79 percent of investments in fixed income securities.

Fixed Income Government Securities

Investments in foreign pension plans fixed income government securities were valued using third party pricing services which are based on a combination of quoted market prices on an exchange in an active market as well as proprietary pricing models and inputs using observable market data and are classified as Level 2 investments.

Insurance Contract

The Company’s foreign pension plans invest in two separate insurance contracts. Investments in the first foreign pension plan insurance contract are valued at the highest value available for the Company at year end, either the reported cash surrender value of the contract or the vested benefit obligation. Both the cash surrender value and the vested benefit obligation are determined based on unobservable inputs, which are contractually or actuarially determined, regarding returns, fees, the present value of the future cash flows of the contract and benefit obligations.

Diversified Equity Securities - Registered Investment Companies

Investments in the foreign pension plans diversified equity securities of registered investment companies are based upon the quoted redemption value of shares in the fund owned by the plan at year end. The shares of the fund are not available on an exchange or in an active market; however, the fair value is determined based on the underlying investments in the fund as traded on an exchange in an active market and are classified as Level 2 investments.

Fixed Income – Foreign Registered Investment Companies

Investments in the foreign pension plans fixed income securities of foreign registered investment companies are based upon the quoted redemption value of shares in the fund owned by the plan at year end. The shares of the fund are not available on an exchange or in an active market; however, the fair value is determined based on the underlying investments in the fund as traded on an exchange in an active market and are classified as Level 2 investments.

Diversified Investment Fund - Registered Investment Companies

Investments in the foreign pension plan diversified investment fund of registered investment companies are based upon the quoted redemption value of shares in the fund owned by the plan at year end. This fund is not available on an exchange or in an active market and this investment is valued using its NAV, which is generally based on the underlying asset values of the investments held. There were no such investments as of December 31, 2025 and 2024.

Other – Alternative Investments

Investments in the foreign pension plans include certain other alternative investments such as inflation and interest rate swaps. These investments are valued based on unobservable inputs, which are contractually or actuarially determined, regarding returns, fees, the present value of future cash flows of the contract and benefit obligations. These alternative investments are classified as Level 3 investments.

Real Estate

The U.S. and foreign pension plans’ investment in real estate consists of investments in property funds. The funds’ underlying investments consist of real property which are valued using unobservable inputs. These property funds are classified as Level 3 investments.

As of December 31, 2025 and 2024, the U.S. and foreign plans’ investments measured at fair value on a recurring basis were as follows:


			Fair Value Measurements at December 31, 2025
	Total Fair Value		Using Fair Value Hierarchy
U.S. Pension Assets			Level 1		Level 2		Level 3
Pooled separate accounts	$	60,917	$	—	$	60,917	$	—
Real estate	—		—		—		—
Subtotal U.S. pension plan assets in fair value hierarchy	$	60,917	$	—	$	60,917	$	—
Total U.S. pension plan assets	$	60,917

Foreign Pension Assets
Cash and cash equivalents	$	1,417	$	1,417	$	—	$	—
Insurance contract	113,184		—		—		113,184
Diversified equity securities - registered investment companies	2,625		—		2,625		—
Fixed income – foreign registered investment companies	9,166		—		9,166		—
Real estate	—		—		—		—
Other - alternative investments	$	1,321	$	—	$	—	$	1,321
Subtotal foreign pension assets in fair value hierarchy	$	127,713	$	1,417	$	11,791	$	114,505
Commingled funds measured at NAV	2,536
Total foreign pension assets	$	130,249

Total pension assets in fair value hierarchy	$	188,630	$	1,417	$	72,708	$	114,505
Total pension assets measured at NAV	2,536
Total pension assets	$	191,166


			Fair Value Measurements at December 31, 2024
	Total Fair Value		Using Fair Value Hierarchy
U.S. Pension Assets			Level 1		Level 2		Level 3
Pooled separate accounts	$	58,454	$	—	$	58,454	$	—
Real estate	1,094		—		—		1,094
Subtotal U.S. pension plan assets in fair value hierarchy	$	59,548	$	—	$	58,454	$	1,094
Total U.S. pension plan assets	$	59,548

Foreign Pension Assets
Cash and cash equivalents	$	1,014	$	1,014	$	—	$	—
Insurance contract	107,797		—		—		107,797
Diversified equity securities - registered investment companies	2,045		—		2,045		—
Fixed income – foreign registered investment companies	8,355		—		8,355		—

Real estate	1,717		—		—		1,717

Subtotal foreign pension assets in fair value hierarchy	$	120,928	$	1,014	$	10,400	$	109,514
Commingled funds measured at NAV	2,035
Total foreign pension assets	$	122,963

Total pension assets in fair value hierarchy	$	180,476	$	1,014	$	68,854	$	110,608
Total pension assets measured at NAV	2,035
Total pension assets	$	182,511

Certain investments that are measured at fair value using the NAV per share (or its equivalent) have not been classified in the fair value hierarchy. The fair value amounts presented for these investments in the preceding tables are intended to permit reconciliation of the fair value hierarchies to the line items presented in the statements of net assets available for benefits.

Changes in the fair value of the plans’ Level 3 investments during the years ended December 31, 2025 and 2024 were as follows:


	Insurance Contract		Real Estate		Total
Balance as of December 31, 2023	$	118,393	$	5,918	$	124,311
Sales	(1,310)		(2,952)		(4,262)

Unrealized losses	(4,620)		(128)		(4,748)
Currency translation adjustment	(4,666)		(27)		(4,693)
Balance as of December 31, 2024	107,797		2,811		110,608
Sales	(1,023)		(1,098)		(2,121)
Unrealized losses	(4,968)		(507)		(5,475)
Currency translation adjustment	11,378		115		11,493
Balance as of December 31, 2025	$	113,184	$	1,321	$	114,505

The Company contributed to a multiemployer defined benefit pension plan under terms of a collective bargaining union contract (the Cleveland Bakers and Teamsters Pension Fund, Employer Identification Number: 34-0904419-001). As of December 31, 2024, the last valuation date available for the multiemployer plan, total plan liabilities were approximately $555 million. As of December 31, 2024, the multiemployer pension plan had total plan assets of approximately $350 million. The Company’s contribution rate to the multiemployer pension plan is specified in the collective bargaining union contract and contributions are made to the plan based on its union employee payroll. The Company contributed $0.1 million during the year ended December 31, 2025.

The Employee Retirement Income Security Act of 1974, as amended by the Multi-Employer Pension Plan Amendments Act of 1980, imposes certain contingent liabilities upon an employer who is a contributor to a multiemployer pension plan if the employer withdraws from the plan or the plan is terminated or experiences a mass withdrawal. In connection with a site closure under the Company’s restructuring program and facility closure actions, the Company withdrew from the multiemployer pension plan during the third quarter of 2025, which resulted in a $0.9 million withdrawal charge recorded within Other (expense) income, net. See Note 9, Other (Expense) Income, net, for additional information.

The Pension Protection Act of 2006 (the “PPA”) also added special funding and operational rules generally applicable to plan years beginning after 2007 for multiemployer plans with certain classifications based on a multitude of factors (including, for example, the plan’s funded percentage, cash flow position and whether the plan is projected to experience a minimum funding deficiency). The plan to which the Company contributes is in “critical” status. Plans in the “critical” status classification must adopt measures to improve their funded status through a funding improvement or rehabilitation plan which may require additional contributions from employers (which may take the form of a surcharge on benefit contributions) and/or modifications to retiree benefits. The amount of additional funds that the Company may be obligated to contribute to the plan in the future cannot be estimated as such amounts will be likely based on future levels of work that require the specific use of those union employees covered by the plan, and the amount of that future work and the number of affected employees that may be needed is not reasonably estimable.

Cash Flows

Contributions

The Company expects to make cash contributions of approximately $4.9 million to its pension plans (approximately $3.0 million U.S. and $1.9 million Foreign) and approximately $0.2 million to its other postretirement benefit plan in 2026.

Estimated Future Benefit Payments

Excluding any impact related to the PPA noted above, the following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:


	Pension Benefits						Other Post- Retirement Benefits
	Foreign		U.S.		Total
2026	$	7,246	$	7,882	$	15,128	$	179
2027	7,500		6,272		13,772		157
2028	7,707		6,202		13,909		145
2029	8,605		6,102		14,707		133
2030	9,309		5,956		15,265		122
2031 to 2035	48,766		27,742		76,508		468

The Company maintains a plan under which supplemental retirement benefits are provided to certain officers. Benefits payable under the plan are based on a combination of years of service and existing postretirement benefits. Included in total pension costs are charges of $0.6 million each for the years ended December 31, 2025, 2024 and 2023, respectively, representing the annual accrued benefits under this plan.

Defined Contribution Plan

The Company sponsors various defined contribution plans in both its U.S. and non-U.S. subsidiaries, under which eligible participants may defer a portion of their compensation up to the allowable amount as determined by the plan. All contributions and Company matches are invested at the direction of the participant. The most significant plan is the Company's primary U.S. 401(k) plan with an employer match covering a majority of its U.S. employees. Beginning in April 2020 and continuing through March 2021, the Company matched both non-elective and elective 401(k) contributions in fully vested shared of the Company’s common stock rather than cash. See Note 8, Equity, for additional information. Total Company contributions under this U.S. 401(k) plan were $6.4 million, $6.6 million and $6.1 million for the years ended December 31, 2025, 2024 and 2023, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (o)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Section S99
-Paragraph 2
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-URI https://asc.fasb.org/1943274/2147480126/715-20-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

Reference 7: http://www.xbrl.org/2003/role/exampleRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
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-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Other Liabilities Disclosure [Abstract]
Uncertain tax positions, including interest and penalties (See Note 10)	$ 14,256	$ 17,257
Environmental reserves (See Note 25)	2,512	2,941
Net investment hedge (See Note 24)	1,541	0
Deferred and other long-term compensation	3,011	2,833
Other	872	1,414
Total other non-current liabilities	$ 22,192	$ 24,445

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2025
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies As used in these Notes to Consolidated Financial Statements, the terms “Quaker,” “Quaker Houghton,” the “Company,” “we,” and “our” refer to Quaker Chemical Corporation (doing business as Quaker Houghton), its subsidiaries, and associated companies, unless the context otherwise requires. Basis of presentation: The accompanying consolidated financial statements were prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and include the accounts of Quaker Houghton and its controlled subsidiaries. Principles of consolidation: We consolidate all entities we control, which generally applies to entities in which we own a majority of the voting interests. Intercompany transactions and balances are eliminated in consolidation. For consolidated subsidiaries in which the Company’s ownership is less than 100%, the outside shareholders’ interests are reflected as non-controlling interests within the consolidated financial statements. The Company is not the primary beneficiary of any variable interest entities (“VIEs”) and therefore the Company’s consolidated financial statements do not include the accounts of any VIEs. Equity method investments: The Company applies the equity method of accounting to investments in which the Company has significant influence but does not control the operating and financial decisions of the investee. This generally applies when the Company’s ownership interest in common stock of the investee is between 20% and 50%. Such investments are presented in “Investments in associated companies” on the Consolidated Balance Sheets. We initially record our investment at cost and subsequently adjust the investment to recognize our share of net earnings and losses and distributions received. The Company’s share of net income or losses in these investments in associated companies is included in the Consolidated Statements of Operations. The Company reviews these investments for impairments when events or changes in circumstances indicate that the carrying amount of the investment may be other-than-temporarily impaired. See Note 16, Investments in Associated Companies, for additional information. Accounting estimates: The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from such estimates. Foreign currency: Since we do business in many foreign countries, fluctuations in currency exchange rates affect our financial position and result of operations. In most of our non-U.S. operations, the local currency is considered the functional currency. The assets and liabilities of non-U.S. subsidiaries and associated companies are translated into U.S. dollars at the respective rates of exchange prevailing at the end of the year. Income and expense accounts are translated at average exchange rates prevailing during the year. Translation adjustments resulting from this process are recorded directly in equity as accumulated other comprehensive income (“AOCI”). Some transactions are made in currencies different from an entity’s functional currency. Gains and losses from remeasurement of these foreign currency transactions, and the impact of related hedges, are generally reflected in “Other (expense) income, net” in the Consolidated Statement of Operations as they occur. See Note 9, Other (expense) income, net, and our policy on accounting for hyperinflation below, for additional information. Hyper-inflationary accounting: Economies that have a cumulative three-year rate of inflation exceeding 100% are considered hyper-inflationary. A legal entity that operates within an economy deemed to be hyper-inflationary is required to remeasure its monetary assets and liabilities to the applicable published exchange rates and record the associated gains or losses resulting from the remeasurement directly to the Consolidated Statements of Operations. Argentina’s and Türkiye’s economies were considered hyper-inflationary effective July 1, 2018 and April 1, 2022, respectively. As of, and for the year ended December 31, 2025, the Company's Argentine and Turkish subsidiaries represented a combined 1% and 2% of the Company’s consolidated total assets and net sales, respectively. For the years ended December 31, 2025, 2024 and 2023, the Company recorded $2.2 million, $0.8 million, and $7.8 million, respectively, of remeasurement losses associated with the applicable currency conversions related to Argentina and Türkiye. These losses were recorded within foreign exchange losses, net, which is a component of Other (expense) income, net, in the Company’s Consolidated Statements of Operations. Segments: The Company’s operating segments, which are consistent with its reportable segments, reflect the structure of the Company’s internal organization, the method by which the Company’s resources are allocated and the manner by which the Chief Operating Decision Maker assesses the Company’s performance. Reclassifications: Certain information has been reclassified to conform to the current year presentation. Business combinations: The Company accounts for business combinations under the acquisition method of accounting. This method requires the recording of acquired assets, including separately identifiable intangible assets, and assumed liabilities at their respective acquisition date estimated fair values. Any excess of the purchase price over the estimated fair value of the identifiable net assets acquired is recorded as goodwill. The determination of the estimated fair value of assets acquired and liabilities assumed requires significant estimates and assumptions. The Company engaged an independent third-party valuation specialist to assist with the allocation of the total purchase price for the acquisition of Dipsol Chemicals Co., Ltd. and its subsidiaries, (“Dipsol”) to the fair value of the net assets acquired. The preliminary fair value of customer-related intangible assets was determined using the multi-period excess earnings method, while the preliminary fair value of product technology and trademarks were determined using the relief from royalty method. These valuation methodologies required the use of several assumptions and estimates, including, but not limited to, the customer attrition rate, the discount rate, net sales attributable to existing customers, the economic life, the EBITDA margin, and the contributory asset charge for the customer-related intangible assets, and the discount rate, the projected revenue, the royalty rate, and the economic life for the product technology and trademark intangible assets. The preliminary fair value of inventory was determined using the net realizable value approach, which includes the use of several estimates, including the selling prices and current replacement cost as of the valuation date. The preliminary fair value of land was determined using a sales comparison approach, which includes the use of several assumptions and estimates, including reproduction/replacement cost, while the preliminary fair value of building and improvements and personal property was determined using the cost approach, which includes the use of several assumptions and estimates, including the building condition, floor value, physical deterioration, functional and economic obsolescence, reproduction/replacement cost, and remaining useful lives. Based on the assessment of additional information during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the estimated fair value of assets acquired and liabilities assumed. See Note 2, Business Combinations, for additional information. Revenue recognition: The Company recognizes revenue in an amount that reflects the consideration to which the Company expects to be entitled in exchange for goods or services transferred to its customers. To do this, the Company applies a five-step model, which requires the Company to: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when, or as, the Company satisfies the performance obligation. The Company identifies a contract with a customer when a sales agreement indicates approval and commitment of the parties; identifies the rights of the parties; identifies the payment terms; has commercial substance; and it is probable that the Company will collect the consideration to which it will be entitled in exchange for the goods or services that will be transferred to the customer. The Company identifies a performance obligation in a contract for each promised good or service that is separately identifiable from other obligations in the contract and for which the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer. The Company determines the transaction price as the amount of consideration it expects to be entitled to in exchange for fulfilling the performance obligations, including the effects of any variable consideration, significant financing elements, amounts payable to the customer or noncash consideration. For any contracts that have more than one performance obligation, the Company allocates the transaction price to each performance obligation in an amount that depicts the amount of consideration to which the Company expects to be entitled in exchange for satisfying each performance obligation. In accordance with the last step of the five-step model, the Company recognizes revenue when, or as, it satisfies the performance obligation in a contract by transferring control of a promised good or providing the service to the customer. The Company typically satisfies its performance obligations and recognizes revenue at a point in time for product sales, generally when products are shipped or delivered to the customer, depending on the terms underlying each arrangement. In circumstances where the Company’s products are on consignment, revenue is generally recognized upon usage or consumption by the customer. For any FluidcareTM or other services provided by the Company to the customer, the Company typically satisfies its performance obligations and recognizes revenue over time, as the promised services are performed. The Company uses input methods to recognize revenue over time related to these services, including labor costs and time incurred. The Company believes that these input methods represent the most indicative measure of the FluidcareTM or other service work performed by the Company. The Company does not have standard payment terms for all customers; however, the Company’s general payment terms require customers to pay for products or services once the performance obligation is satisfied. The Company does not have significant financing arrangements with its customers. In addition, the Company expenses costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less. In addition, the Company excludes from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the entity from a customer, including sales, use, value added, excise and various other taxes. Lastly, the Company has elected to account for shipping and handling costs incurred after the customer has obtained control of a good as a fulfillment cost, rather than an additional promised service. The Company does not have significant amounts of variable consideration in its contracts with customers. The Company records license fees received from third-parties in Other (expense) income, net, in its Consolidated Statements of Operations, which generally include sales-based royalties in exchange for the license of intellectual property. These license fees are recognized in accordance with their agreed-upon terms and when performance obligations are satisfied, which is generally when the third party has a subsequent sale. The Company recognizes a contract asset or receivable on its Consolidated Balance Sheet when the Company performs a service or transfers a good in advance of receiving consideration. A receivable is the Company’s right to consideration that is unconditional and only the passage of time is required before payment of that consideration is due. A contract asset is the Company’s right to consideration in exchange for goods or services that the Company has transferred to a customer. A contract liability is recognized when the Company receives consideration, or if it has the unconditional right to receive consideration, in advance of performance. A contract liability is the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration, or a specified amount of consideration is due, from the customer. See Note 5, Net Sales and Revenue Recognition, for additional information. Right-of-use lease assets and lease liabilities: The Company determines if an arrangement is a lease at its inception. This determination generally depends on whether the arrangement conveys the right to control the use of an identified asset for a period of time in exchange for consideration. Control of an underlying asset is conveyed if the Company obtains the right to direct the use of the asset, and obtains substantially all of the economic benefits from its use. Lease expense for variable leases and short-term leases is recognized when the obligation is incurred. The lease term for all of the Company’s leases includes the non-cancellable period of the lease, adjusted for any renewal and termination options that the Company is reasonably certain it will exercise. Operating leases are included in right-of-use lease assets, other accrued liabilities and long-term lease liabilities on the Consolidated Balance Sheet. Right-of-use lease assets and liabilities are recognized on the lease commencement date based on the present value of lease payments over the respective lease term. Operating lease expense is recognized on a straight-line basis over the lease term. The Company uses the stated borrowing rate for a lease when readily determinable. When a stated borrowing rate is not available in a lease agreement, the Company uses its incremental borrowing rate at the lease commencement date to determine the present value of its lease payments. In determining the incremental borrowing rate, the Company considers information including fully secured borrowing rates readily available to the Company and its subsidiaries. The Company includes finance leases in property, plant and equipment (“PP&E”), current portion of long-term debt and long-term debt on the Consolidated Balance Sheet. See Note 6, Leases, for additional information. Restructuring activities: Restructuring programs consist of employee severance, rationalization of manufacturing or other facilities and other related items. To account for such programs, the Company recognizes a liability for the cost associated with an exit or disposal activity, when the liability is incurred, is estimable, and payment is probable. See Note 7, Restructuring and Related Activities, for additional information. Share-based compensation: The Company has long-term incentive programs (“LTIP”) for key employees which provides for the granting of stock options, restricted stock units (“RSU”), restricted stock awards (“RSAs”), and performance-based stock awards (“PSUs”). Share-based awards may also be granted under other equity compensation plans. Share-based compensation cost for awards under LTIP and equity compensation plans is measured at the grant date based on the fair value and is recognized as expense over the requisite service period, which is the vesting period. The fair value of stock options granted is determined using the Black-Scholes option valuation model on the grant date. The fair value of time-based RSAs, time-based RSUs, and performance-based PSUs, for which the performance measure is return on investment capital (“ROIC”), is based on the trading price of the Company’s common stock on the date of grant. The fair value of market-based PSUs, for which the performance measure is total shareholder return (“TSR”), is determined using a Monte Carlo simulation model. The Company elected to account for forfeitures on awards as they occur. See Note 8, Equity, for additional information. Research and development costs: Research and development costs are expensed as incurred and are included in selling, general and administrative expenses (“SG&A”). Research and development expenses were $60.7 million, $57.3 million and $50.3 million for the years ended December 31, 2025, 2024 and 2023, respectively. Income taxes and uncertain tax positions: The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred taxes represent the future tax consequences expected to occur when the reported amounts of assets and liabilities are recovered or paid. The provision for income taxes represents income taxes paid or payable for the current year and the change in deferred taxes during the year. Deferred taxes result from differences between the financial and tax bases of the Company’s assets and liabilities and are adjusted for changes in tax rates and tax laws when changes are enacted. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. The Company accounts for uncertainty in income taxes by applying the recognition threshold and measurement attributes for financial statement recognition and measurement of tax positions taken or expected to be taken on a tax return. The Company determines whether the benefits of tax positions are probable or more likely than not sustained upon audit based upon the technical merits of the tax position. For tax positions that are determined to be more likely than not sustained upon audit, the Company recognizes the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not determined to be more likely than not sustained upon audit, the Company does not recognize any portion of the benefit in the financial statements. Additionally, the Company monitors and adjusts for derecognition, classification, and penalties and interest in interim periods, with appropriate disclosure and transition thereto. Also, the amount of interest expense and income related to uncertain tax positions is computed by applying the applicable statutory rate of interest to the difference between the tax position recognized, including timing differences, and the amount previously taken or expected to be taken in a tax return. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. Finally, when applicable, the Company nets its liability for unrecognized tax benefits against deferred tax assets related to net operating losses or other tax credit carryforwards that would apply if the uncertain tax position were settled for the presumed amount at the balance sheet date. Pursuant to the Tax Cuts and Jobs Act (“U.S. Tax Reform”), specifically the one-time tax on deemed repatriation (the “Transition Tax”), the Company has provided for U.S. income tax on its undistributed earnings of non-U.S. subsidiaries. However, the Company is subject to and will incur other taxes, such as withholding taxes and dividend distribution taxes, if these undistributed earnings were ultimately remitted to the U.S. The Company currently intends to reinvest its future undistributed earnings of non-U.S. subsidiaries to support working capital needs and certain other growth initiatives of those subsidiaries. However, in certain cases the Company has and may in the future change its indefinite reinvestment assertion for any or all of these undistributed earnings. In this case, the Company would estimate and record a tax liability and corresponding tax expense for the amount of non-U.S. income taxes it would incur to ultimately remit these earnings to the U.S. See Note 10, Income Taxes, for additional information. Earnings per share: In the Company’s earnings per share calculation, non-vested stock awards with rights to non-forfeitable dividends are included as part of the basic weighted average share calculation under the two-class method. See Note 11, Earnings per Share, for additional information. Comprehensive income (loss): The Company presents Other comprehensive income (loss) in its Statements of Comprehensive Income (Loss). The Company discloses significant amounts reclassified from each component of AOCI, the related tax amounts and the income statement line items affected by such reclassifications. See Note 22, Accumulated Other Comprehensive Loss, for additional information. Cash and cash equivalents: The Company invests temporary and excess funds in money market securities and financial instruments having maturities within 90 days. The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company has not experienced losses from the aforementioned investments. Accounts receivable and allowance for credit losses: Trade accounts receivable subject the Company to credit risk. Trade accounts receivable are recorded at the invoiced amount and generally do not bear interest. The Company recognizes an allowance for credit losses, which represents the portion of the receivable that the Company does not expect to collect over its contractual life, considering past events and reasonable and supportable forecasts of future economic conditions. The Company’s allowance for credit losses on its trade accounts receivable is based on specific collectability facts and circumstances, the aging of outstanding receivables, and the associated collection risk the Company estimates for certain past due aging categories, and also, the general risk to all outstanding accounts receivable based on historical amounts determined to be uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers. See Note 12, Accounts Receivable and Allowance for Credit Losses, for additional information. Inventories: Inventories are valued at the lower of cost or net realizable value, and are valued using the first-in, first-out method. See Note 13, Inventories, for additional information. Long-lived assets: PP&E is stated at gross cost, less accumulated depreciation. Depreciation is computed using the straight-line method on an individual asset basis over the following estimated useful lives: buildings and improvements, 10 to 33 years (for finance leases, the remaining term of the lease); and machinery and equipment, 4 to 10 years (for financing leases, the remaining term of the lease). The carrying values of long-lived assets are evaluated whenever changes in circumstances or current events indicate the carrying amount of such assets may not be recoverable. An estimate of undiscounted cash flows produced by the asset, or the appropriate group of assets, is compared with the carrying value to determine whether an impairment exists. If necessary, the Company recognizes an impairment loss for the difference between the carrying amount of the assets and their estimated fair value. Fair value is based on current and anticipated future cash flows. Upon sale or other disposition of long-lived assets, the applicable asset cost and accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposals, is recorded in the Consolidated Statements of Operations. Expenditures for improvements that increase the estimated useful life or capacity of the assets are capitalized, whereas expenditures for repairs and maintenance are expensed when incurred. See Note 14, Property, Plant, and Equipment, for additional information. Capitalized software: The Company capitalizes certain costs in connection with developing or obtaining software for internal use. These costs are amortized over the expected useful life of the software- generally 3 to 5 years once the assets are ready for their intended use. In connection with implementations and upgrades to the Company’s global transaction, consolidation and other related systems, approximately $2.3 million and $2.9 million of net costs were capitalized in PP&E on the Company’s Consolidated Balance Sheets as of December 31, 2025 and 2024, respectively. The Company capitalizes costs incurred with the implementation of a cloud computing arrangement that is a service contract, consistent with its policy for software for internal use. The capitalized costs are reflected in “Prepaid expenses and other current assets” and "Other non-current assets" on its Consolidated Balance Sheets and expensed over the term of the related hosting arrangement. Goodwill and other intangible assets: The Company records goodwill, definite-lived intangible assets and indefinite-lived intangible assets at fair value at the date of acquisition. Goodwill and indefinite-lived intangible assets are not amortized but tested for impairment at least annually. These tests will be performed more frequently if triggering events indicate potential impairment. In completing a quantitative goodwill impairment test, the Company compares a reporting unit’s fair value, based on future discounted cash flows, to its carrying value in order to determine if an impairment charge is warranted. Definite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives, generally for periods ranging from 5 to 24 years. The Company continually evaluates the reasonableness of the useful lives of these assets, consistent with the discussion of long-lived assets, above. See Note 15, Goodwill and Other Intangible Assets, and Note 23, Fair Value Measures, for additional information. Fair value measurements: Fair value is defined as an exit price, or the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. See Notes 20, 23 and 24 for additional information. The following briefly describes those three levels: •Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. •Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly, for sustainability the full term of the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. •Level 3: Unobservable inputs for the asset or liability that reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability. Pension and other postretirement benefits: The Company maintains various noncontributory retirement plans, covering a portion of its employees in the U.S. and certain other countries, including the Netherlands, the United Kingdom (“U.K.”), Mexico, Sweden, Germany and France. The plans of the remaining non-U.S. subsidiaries are, for the most part, either fully insured or integrated with the local governments’ plans. The Company recognizes the funded status of defined benefit pension and other postretirement plans on its Consolidated Balance Sheets and also, recognizes as a component of AOCI, net of tax, the gains or losses and prior service costs that arise during the period but are not recognized as components of net periodic benefit cost. In addition, the Company recognizes a settlement charge in its Consolidated Statements of Operations when certain events occur, including plan termination or the settlement of certain plan liabilities. A settlement charge represents the immediate recognition into expense of a portion of the unrecognized loss within AOCI on the balance sheet in proportion to the share of the projected benefit obligation that was settled. The measurement date for the Company’s postretirement benefits plan is December 31. The Company’s global pension investment policies are designed to ensure that pension assets are invested in a manner consistent with meeting the future benefit obligations of the pension plans and maintaining compliance with various laws and regulations including the Employee Retirement Income Security Act of 1974. The Company establishes strategic asset allocation percentage targets and benchmarks for significant asset classes with the aim of achieving a prudent balance between return and risk. The Company’s investment horizon is generally long term, and, accordingly, the target asset allocations encompass a long-term perspective of capital markets, expected risk and return and perceived future economic conditions while also considering the profile of plan liabilities. To the extent feasible, the short-term investment portfolio is managed to match the short-term obligations, the intermediate portfolio duration is matched to reduce the risk of volatility in intermediate plan distributions, and the total return portfolio is managed to maximize the long-term real growth of plan assets. The critical investment principles of diversification, assessment of risk and targeting the optimal expected returns for given levels of risk are applied. The Company’s investment guidelines prohibit the use of securities such as letter stock and other unregistered securities, commodities or commodity contracts, short sales, margin transactions, private placements (unless specifically addressed by addendum), or any derivatives, options or futures for the purpose of portfolio leveraging. The target asset allocation is reviewed periodically and is determined based on a long-term projection of capital market outcomes, inflation rates, fixed income yields, returns, volatilities and correlation relationships. The interaction between plan assets and benefit obligations is periodically studied to assist in establishing such strategic asset allocation targets. Asset performance is monitored with an overall expectation that plan assets will meet or exceed benchmark performance over rolling five-year periods. The Company’s pension committee, as authorized by the Company’s Board, has discretion to manage the assets within established asset allocation ranges approved by senior management of the Company. See Note 20, Pension and Other Postretirement Benefits, for additional information. Derivatives: The Company uses interest rate swap agreements to manage risk, including exposure to variability in interest payments associated with its variable rate debt. Interest rate swaps are designated as cash flow hedges and, as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur. The Company uses fixed-for-fixed cross-currency swap agreements to manage risk, including to hedge the variability of exchange rates of our foreign net investments. The fixed-for-fixed cross-currency swap agreements are designated as net investment hedges and, as such, the agreements are marked to market at each reporting date and any unrealized gains or losses are included in unrealized currency translation adjustments, within AOCI. The Company uses the spot method to evaluate the effectiveness of the net investment hedges. The Company uses foreign exchange forward contracts to economically hedge the impact of variability in exchange rates on certain assets and/or liabilities denominated in foreign currencies. Forward contracts are marked-to-market at each reporting date, with changes in the fair value of the underlying instruments, as well as gains and losses on the hedged foreign currency transactions, recognized in earnings in Other (expense) income, net. The fair value of forward contracts are determined from sources independent of the Company, including the financial institutions which are party to the derivative instruments. See Note 24, Hedging Activities, for additional information Environmental liabilities and expenditures: Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimable. If there is a range of estimated liability and no amount in that range is considered more probable than another, then the Company records the lowest amount in the range. Environmental costs and remediation costs are capitalized if the costs extend the life, increase the capacity or improve safety or efficiency of the property from the date acquired or constructed, and/or mitigate or prevent contamination in the future. See Note 25, Commitments and Contingencies, for additional information.

Net Sales and Revenue Recognition - Schedule of Disaggregation of Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Product Information [Line Items]
Net sales	$ 1,888,634	$ 1,839,686	$ 1,953,313
Operating Segments
Product Information [Line Items]
Net sales	1,888,634	1,839,686	1,953,313
Operating Segments \| Americas
Product Information [Line Items]
Net sales	865,332	882,131	977,095
Operating Segments \| EMEA
Product Information [Line Items]
Net sales	548,110	536,435	571,347
Operating Segments \| Asia/Pacific
Product Information [Line Items]
Net sales	475,192	421,120	404,871
Operating Segments \| Metals
Product Information [Line Items]
Net sales	610,543	601,515	600,731
Operating Segments \| Metals \| Americas
Product Information [Line Items]
Net sales	255,281	258,818	268,174
Operating Segments \| Metals \| EMEA
Product Information [Line Items]
Net sales	138,908	135,373	136,979
Operating Segments \| Metals \| Asia/Pacific
Product Information [Line Items]
Net sales	216,354	207,324	195,578
Operating Segments \| Metalworking and Other
Product Information [Line Items]
Net sales	1,278,091	1,238,171	1,352,582
Operating Segments \| Metalworking and Other \| Americas
Product Information [Line Items]
Net sales	610,051	623,313	708,921
Operating Segments \| Metalworking and Other \| EMEA
Product Information [Line Items]
Net sales	409,202	401,062	434,368
Operating Segments \| Metalworking and Other \| Asia/Pacific
Product Information [Line Items]
Net sales	$ 258,838	$ 213,796	$ 209,293

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net (loss) income attributable to Quaker Chemical Corporation	$ (2,488)	$ 116,644	$ 112,748
Less: loss (income) allocated to participating securities	20	(375)	(555)
Net (loss) income available to common shareholders	$ (2,468)	$ 116,269	$ 112,193
Basic weighted average common shares outstanding (in shares)	17,472,907	17,850,462	17,892,461
Basic (loss) earnings per common share (in dollars per share)	$ (0.14)	$ 6.51	$ 6.27

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plan withdrawal charge		$ 923	$ 0	$ 0
Pension and other postretirement benefits		(4,132)	(4,460)	(2,079)
Total contribution amount		$ 6,400	$ 6,600	6,100
U.S. \| Defined Benefit Plan, Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Investments (in percent)		21.00%
U.S. \| Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Investments (in percent)		79.00%
Foreign \| Defined Benefit Plan, Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Investments (in percent)		37.00%	37.00%
Foreign \| Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Investments (in percent)		48.00%	48.00%
Foreign \| Other Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Investments (in percent)		15.00%	15.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		$ 204,800	$ 199,900
Minimum expected cash contributions in next fiscal year		4,900
Pension and other postretirement benefits		2,145	2,285	2,535
Pension Benefits \| Cleveland Bakers and Teamsters Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plan liabilities			555,000
Multiemployer plan pension assets			350,000
Multiemployer plan contributions		100
Multiemployer plan withdrawal charge	$ 900
Pension Benefits \| U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		72,300	73,400
Minimum expected cash contributions in next fiscal year		3,000
Pension and other postretirement benefits		884	1,133	1,121
Pension Benefits \| Foreign
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		132,500	126,500
Minimum expected cash contributions in next fiscal year		1,900
Pension and other postretirement benefits		1,261	1,152	1,414
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Minimum expected cash contributions in next fiscal year		200
Other Postretirement Benefits \| U.S.
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefits		(33)	(41)	(75)
Supplemental Retirement Benefits Plan \| U.S.
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefits		$ 600	$ 600	$ 600

Earnings Per Share

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Earnings Per Share

The following table summarizes earnings per share calculations for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023
Basic earnings per common share
Net (loss) income attributable to Quaker Chemical Corporation	$	(2,488)	$	116,644	$	112,748
Less: loss (income) allocated to participating securities	20		(375)		(555)
Net (loss) income available to common shareholders	$	(2,468)	$	116,269	$	112,193
Basic weighted average common shares outstanding	17,472,907		17,850,462		17,892,461
Basic (loss) earnings per common share	$	(0.14)	$	6.51	$	6.27

Diluted earnings per common share
Net (loss) income attributable to Quaker Chemical Corporation	$	(2,488)	$	116,644	$	112,748
Less: loss (income) allocated to participating securities	20		(375)		(554)
Net (loss) income available to common shareholders	$	(2,468)	$	116,269	$	112,194
Basic weighted average common shares outstanding	17,472,907		17,850,462		17,892,461
Effect of dilutive securities	—		19,605		22,348
Diluted weighted average common shares outstanding	17,472,907		17,870,067		17,914,809
Diluted (loss) earnings per common share	$	(0.14)	$	6.51	$	6.26

Certain stock options, restricted stock units and PSUs are not included in the diluted earnings per share calculation when the effect would be anti-dilutive. The number of anti-dilutive shares were 79,144, 32,353, and 10,621 for the years ended December 31, 2025, 2024 and 2023, respectively.

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Outstanding Balance	$ 871,210	$ 708,267
Less: debt issuance costs	(652)	(1,099)
Less: short-term and current portion of long-term debts	(35,657)	(37,554)
Total long-term debt	$ 834,901	$ 669,614
Revolver
Debt Instrument [Line Items]
Interest Rate	4.95%	4.00%
Outstanding Balance	$ 229,088	$ 48,820
U.S. Term Loan
Debt Instrument [Line Items]
Interest Rate	5.10%	5.62%
Outstanding Balance	$ 482,144	$ 508,863
EURO Term Loan
Debt Instrument [Line Items]
Interest Rate	3.13%	4.00%
Outstanding Balance	$ 148,477	$ 138,767
Industrial development bonds
Debt Instrument [Line Items]
Interest Rate	5.26%	5.26%
Outstanding Balance	$ 10,000	$ 10,000
Bank lines of credit and other debt obligations
Debt Instrument [Line Items]
Outstanding Balance	$ 1,501	$ 1,817

Earnings Per Share - Antidilutive Shares (Details) - shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Antidilutive shares (in shares)	79,144	32,353	10,621

Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 124,751	$ 112,457
Work in process, finished goods and reserves	141,025	115,015
Total inventories	$ 265,776	$ 227,472

Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2025
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation: The accompanying consolidated financial statements were prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and include the accounts of Quaker Houghton and its controlled subsidiaries.
Principles of consolidation	Principles of consolidation: We consolidate all entities we control, which generally applies to entities in which we own a majority of the voting interests. Intercompany transactions and balances are eliminated in consolidation. For consolidated subsidiaries in which the Company’s ownership is less than 100%, the outside shareholders’ interests are reflected as non-controlling interests within the consolidated financial statements. The Company is not the primary beneficiary of any variable interest entities (“VIEs”) and therefore the Company’s consolidated financial statements do not include the accounts of any VIEs.
Equity method investments	Equity method investments: The Company applies the equity method of accounting to investments in which the Company has significant influence but does not control the operating and financial decisions of the investee. This generally applies when the Company’s ownership interest in common stock of the investee is between 20% and 50%. Such investments are presented in “Investments in associated companies” on the Consolidated Balance Sheets. We initially record our investment at cost and subsequently adjust the investment to recognize our share of net earnings and losses and distributions received. The Company’s share of net income or losses in these investments in associated companies is included in the Consolidated Statements of Operations. The Company reviews these investments for impairments when events or changes in circumstances indicate that the carrying amount of the investment may be other-than-temporarily impaired.
Accounting estimates	Accounting estimates: The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from such estimates.
Foreign currency	Foreign currency: Since we do business in many foreign countries, fluctuations in currency exchange rates affect our financial position and result of operations. In most of our non-U.S. operations, the local currency is considered the functional currency. The assets and liabilities of non-U.S. subsidiaries and associated companies are translated into U.S. dollars at the respective rates of exchange prevailing at the end of the year. Income and expense accounts are translated at average exchange rates prevailing during the year. Translation adjustments resulting from this process are recorded directly in equity as accumulated other comprehensive income (“AOCI”). Some transactions are made in currencies different from an entity’s functional currency. Gains and losses from remeasurement of these foreign currency transactions, and the impact of related hedges, are generally reflected in “Other (expense) income, net” in the Consolidated Statement of Operations as they occur.
Hyper-inflationary accounting	Hyper-inflationary accounting: Economies that have a cumulative three-year rate of inflation exceeding 100% are considered hyper-inflationary. A legal entity that operates within an economy deemed to be hyper-inflationary is required to remeasure its monetary assets and liabilities to the applicable published exchange rates and record the associated gains or losses resulting from the remeasurement directly to the Consolidated Statements of Operations.
Segments	Segments: The Company’s operating segments, which are consistent with its reportable segments, reflect the structure of the Company’s internal organization, the method by which the Company’s resources are allocated and the manner by which the Chief Operating Decision Maker assesses the Company’s performance.
Reclassifications	Reclassifications: Certain information has been reclassified to conform to the current year presentation.
Business combinations	Business combinations: The Company accounts for business combinations under the acquisition method of accounting. This method requires the recording of acquired assets, including separately identifiable intangible assets, and assumed liabilities at their respective acquisition date estimated fair values. Any excess of the purchase price over the estimated fair value of the identifiable net assets acquired is recorded as goodwill. The determination of the estimated fair value of assets acquired and liabilities assumed requires significant estimates and assumptions. The Company engaged an independent third-party valuation specialist to assist with the allocation of the total purchase price for the acquisition of Dipsol Chemicals Co., Ltd. and its subsidiaries, (“Dipsol”) to the fair value of the net assets acquired. The preliminary fair value of customer-related intangible assets was determined using the multi-period excess earnings method, while the preliminary fair value of product technology and trademarks were determined using the relief from royalty method. These valuation methodologies required the use of several assumptions and estimates, including, but not limited to, the customer attrition rate, the discount rate, net sales attributable to existing customers, the economic life, the EBITDA margin, and the contributory asset charge for the customer-related intangible assets, and the discount rate, the projected revenue, the royalty rate, and the economic life for the product technology and trademark intangible assets. The preliminary fair value of inventory was determined using the net realizable value approach, which includes the use of several estimates, including the selling prices and current replacement cost as of the valuation date. The preliminary fair value of land was determined using a sales comparison approach, which includes the use of several assumptions and estimates, including reproduction/replacement cost, while the preliminary fair value of building and improvements and personal property was determined using the cost approach, which includes the use of several assumptions and estimates, including the building condition, floor value, physical deterioration, functional and economic obsolescence, reproduction/replacement cost, and remaining useful lives. Based on the assessment of additional information during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the estimated fair value of assets acquired and liabilities assumed.
Revenue recognition	Revenue recognition: The Company recognizes revenue in an amount that reflects the consideration to which the Company expects to be entitled in exchange for goods or services transferred to its customers. To do this, the Company applies a five-step model, which requires the Company to: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when, or as, the Company satisfies the performance obligation. The Company identifies a contract with a customer when a sales agreement indicates approval and commitment of the parties; identifies the rights of the parties; identifies the payment terms; has commercial substance; and it is probable that the Company will collect the consideration to which it will be entitled in exchange for the goods or services that will be transferred to the customer. The Company identifies a performance obligation in a contract for each promised good or service that is separately identifiable from other obligations in the contract and for which the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer. The Company determines the transaction price as the amount of consideration it expects to be entitled to in exchange for fulfilling the performance obligations, including the effects of any variable consideration, significant financing elements, amounts payable to the customer or noncash consideration. For any contracts that have more than one performance obligation, the Company allocates the transaction price to each performance obligation in an amount that depicts the amount of consideration to which the Company expects to be entitled in exchange for satisfying each performance obligation. In accordance with the last step of the five-step model, the Company recognizes revenue when, or as, it satisfies the performance obligation in a contract by transferring control of a promised good or providing the service to the customer. The Company typically satisfies its performance obligations and recognizes revenue at a point in time for product sales, generally when products are shipped or delivered to the customer, depending on the terms underlying each arrangement. In circumstances where the Company’s products are on consignment, revenue is generally recognized upon usage or consumption by the customer. For any FluidcareTM or other services provided by the Company to the customer, the Company typically satisfies its performance obligations and recognizes revenue over time, as the promised services are performed. The Company uses input methods to recognize revenue over time related to these services, including labor costs and time incurred. The Company believes that these input methods represent the most indicative measure of the FluidcareTM or other service work performed by the Company. The Company does not have standard payment terms for all customers; however, the Company’s general payment terms require customers to pay for products or services once the performance obligation is satisfied. The Company does not have significant financing arrangements with its customers. In addition, the Company expenses costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less. In addition, the Company excludes from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the entity from a customer, including sales, use, value added, excise and various other taxes. Lastly, the Company has elected to account for shipping and handling costs incurred after the customer has obtained control of a good as a fulfillment cost, rather than an additional promised service. The Company does not have significant amounts of variable consideration in its contracts with customers. The Company records license fees received from third-parties in Other (expense) income, net, in its Consolidated Statements of Operations, which generally include sales-based royalties in exchange for the license of intellectual property. These license fees are recognized in accordance with their agreed-upon terms and when performance obligations are satisfied, which is generally when the third party has a subsequent sale. The Company recognizes a contract asset or receivable on its Consolidated Balance Sheet when the Company performs a service or transfers a good in advance of receiving consideration. A receivable is the Company’s right to consideration that is unconditional and only the passage of time is required before payment of that consideration is due. A contract asset is the Company’s right to consideration in exchange for goods or services that the Company has transferred to a customer. A contract liability is recognized when the Company receives consideration, or if it has the unconditional right to receive consideration, in advance of performance. A contract liability is the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration, or a specified amount of consideration is due, from the customer.
Right of use lease assets and lease liabilities	Right-of-use lease assets and lease liabilities: The Company determines if an arrangement is a lease at its inception. This determination generally depends on whether the arrangement conveys the right to control the use of an identified asset for a period of time in exchange for consideration. Control of an underlying asset is conveyed if the Company obtains the right to direct the use of the asset, and obtains substantially all of the economic benefits from its use. Lease expense for variable leases and short-term leases is recognized when the obligation is incurred. The lease term for all of the Company’s leases includes the non-cancellable period of the lease, adjusted for any renewal and termination options that the Company is reasonably certain it will exercise. Operating leases are included in right-of-use lease assets, other accrued liabilities and long-term lease liabilities on the Consolidated Balance Sheet. Right-of-use lease assets and liabilities are recognized on the lease commencement date based on the present value of lease payments over the respective lease term. Operating lease expense is recognized on a straight-line basis over the lease term. The Company uses the stated borrowing rate for a lease when readily determinable. When a stated borrowing rate is not available in a lease agreement, the Company uses its incremental borrowing rate at the lease commencement date to determine the present value of its lease payments. In determining the incremental borrowing rate, the Company considers information including fully secured borrowing rates readily available to the Company and its subsidiaries. The Company includes finance leases in property, plant and equipment (“PP&E”), current portion of long-term debt and long-term debt on the Consolidated Balance Sheet.
Restructuring activities	Restructuring activities: Restructuring programs consist of employee severance, rationalization of manufacturing or other facilities and other related items. To account for such programs, the Company recognizes a liability for the cost associated with an exit or disposal activity, when the liability is incurred, is estimable, and payment is probable.
Share-based compensation	Share-based compensation: The Company has long-term incentive programs (“LTIP”) for key employees which provides for the granting of stock options, restricted stock units (“RSU”), restricted stock awards (“RSAs”), and performance-based stock awards (“PSUs”). Share-based awards may also be granted under other equity compensation plans. Share-based compensation cost for awards under LTIP and equity compensation plans is measured at the grant date based on the fair value and is recognized as expense over the requisite service period, which is the vesting period. The fair value of stock options granted is determined using the Black-Scholes option valuation model on the grant date. The fair value of time-based RSAs, time-based RSUs, and performance-based PSUs, for which the performance measure is return on investment capital (“ROIC”), is based on the trading price of the Company’s common stock on the date of grant. The fair value of market-based PSUs, for which the performance measure is total shareholder return (“TSR”), is determined using a Monte Carlo simulation model. The Company elected to account for forfeitures on awards as they occur.
Research and development costs	Research and development costs: Research and development costs are expensed as incurred and are included in selling, general and administrative expenses (“SG&A”).
Income taxes and uncertain tax positions	Income taxes and uncertain tax positions: The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred taxes represent the future tax consequences expected to occur when the reported amounts of assets and liabilities are recovered or paid. The provision for income taxes represents income taxes paid or payable for the current year and the change in deferred taxes during the year. Deferred taxes result from differences between the financial and tax bases of the Company’s assets and liabilities and are adjusted for changes in tax rates and tax laws when changes are enacted. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. The Company accounts for uncertainty in income taxes by applying the recognition threshold and measurement attributes for financial statement recognition and measurement of tax positions taken or expected to be taken on a tax return. The Company determines whether the benefits of tax positions are probable or more likely than not sustained upon audit based upon the technical merits of the tax position. For tax positions that are determined to be more likely than not sustained upon audit, the Company recognizes the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not determined to be more likely than not sustained upon audit, the Company does not recognize any portion of the benefit in the financial statements. Additionally, the Company monitors and adjusts for derecognition, classification, and penalties and interest in interim periods, with appropriate disclosure and transition thereto. Also, the amount of interest expense and income related to uncertain tax positions is computed by applying the applicable statutory rate of interest to the difference between the tax position recognized, including timing differences, and the amount previously taken or expected to be taken in a tax return. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. Finally, when applicable, the Company nets its liability for unrecognized tax benefits against deferred tax assets related to net operating losses or other tax credit carryforwards that would apply if the uncertain tax position were settled for the presumed amount at the balance sheet date. Pursuant to the Tax Cuts and Jobs Act (“U.S. Tax Reform”), specifically the one-time tax on deemed repatriation (the “Transition Tax”), the Company has provided for U.S. income tax on its undistributed earnings of non-U.S. subsidiaries. However, the Company is subject to and will incur other taxes, such as withholding taxes and dividend distribution taxes, if these undistributed earnings were ultimately remitted to the U.S. The Company currently intends to reinvest its future undistributed earnings of non-U.S. subsidiaries to support working capital needs and certain other growth initiatives of those subsidiaries. However, in certain cases the Company has and may in the future change its indefinite reinvestment assertion for any or all of these undistributed earnings. In this case, the Company would estimate and record a tax liability and corresponding tax expense for the amount of non-U.S. income taxes it would incur to ultimately remit these earnings to the U.S.
Earnings per share	Earnings per share: In the Company’s earnings per share calculation, non-vested stock awards with rights to non-forfeitable dividends are included as part of the basic weighted average share calculation under the two-class method.
Comprehensive income (loss)	Comprehensive income (loss): The Company presents Other comprehensive income (loss) in its Statements of Comprehensive Income (Loss). The Company discloses significant amounts reclassified from each component of AOCI, the related tax amounts and the income statement line items affected by such reclassifications.
Cash and cash equivalents	Cash and cash equivalents: The Company invests temporary and excess funds in money market securities and financial instruments having maturities within 90 days. The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company has not experienced losses from the aforementioned investments.
Accounts receivable and allowance for credit losses	Accounts receivable and allowance for credit losses: Trade accounts receivable subject the Company to credit risk. Trade accounts receivable are recorded at the invoiced amount and generally do not bear interest. The Company recognizes an allowance for credit losses, which represents the portion of the receivable that the Company does not expect to collect over its contractual life, considering past events and reasonable and supportable forecasts of future economic conditions. The Company’s allowance for credit losses on its trade accounts receivable is based on specific collectability facts and circumstances, the aging of outstanding receivables, and the associated collection risk the Company estimates for certain past due aging categories, and also, the general risk to all outstanding accounts receivable based on historical amounts determined to be uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers.
Inventories	Inventories: Inventories are valued at the lower of cost or net realizable value, and are valued using the first-in, first-out method.
Long-lived assets	Long-lived assets: PP&E is stated at gross cost, less accumulated depreciation. Depreciation is computed using the straight-line method on an individual asset basis over the following estimated useful lives: buildings and improvements, 10 to 33 years (for finance leases, the remaining term of the lease); and machinery and equipment, 4 to 10 years (for financing leases, the remaining term of the lease). The carrying values of long-lived assets are evaluated whenever changes in circumstances or current events indicate the carrying amount of such assets may not be recoverable. An estimate of undiscounted cash flows produced by the asset, or the appropriate group of assets, is compared with the carrying value to determine whether an impairment exists. If necessary, the Company recognizes an impairment loss for the difference between the carrying amount of the assets and their estimated fair value. Fair value is based on current and anticipated future cash flows. Upon sale or other disposition of long-lived assets, the applicable asset cost and accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposals, is recorded in the Consolidated Statements of Operations. Expenditures for improvements that increase the estimated useful life or capacity of the assets are capitalized, whereas expenditures for repairs and maintenance are expensed when incurred.
Capitalized software	Capitalized software: The Company capitalizes certain costs in connection with developing or obtaining software for internal use. These costs are amortized over the expected useful life of the software- generally 3 to 5 years once the assets are ready for their intended use. The Company capitalizes costs incurred with the implementation of a cloud computing arrangement that is a service contract, consistent with its policy for software for internal use. The capitalized costs are reflected in “Prepaid expenses and other current assets” and "Other non-current assets" on its Consolidated Balance Sheets and expensed over the term of the related hosting arrangement.
Goodwill and other intangible assets	Goodwill and other intangible assets: The Company records goodwill, definite-lived intangible assets and indefinite-lived intangible assets at fair value at the date of acquisition. Goodwill and indefinite-lived intangible assets are not amortized but tested for impairment at least annually. These tests will be performed more frequently if triggering events indicate potential impairment. In completing a quantitative goodwill impairment test, the Company compares a reporting unit’s fair value, based on future discounted cash flows, to its carrying value in order to determine if an impairment charge is warranted. Definite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives, generally for periods ranging from 5 to 24 years. The Company continually evaluates the reasonableness of the useful lives of these assets, consistent with the discussion of long-lived assets, above.
Fair value measurements	Fair value measurements: Fair value is defined as an exit price, or the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. See Notes 20, 23 and 24 for additional information. The following briefly describes those three levels: •Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. •Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly, for sustainability the full term of the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. •Level 3: Unobservable inputs for the asset or liability that reflect the reporting entity's own assumptions about the assumptions that market participants would use in pricing the asset or liability.
Pension and other postretirement benefits	Pension and other postretirement benefits: The Company maintains various noncontributory retirement plans, covering a portion of its employees in the U.S. and certain other countries, including the Netherlands, the United Kingdom (“U.K.”), Mexico, Sweden, Germany and France. The plans of the remaining non-U.S. subsidiaries are, for the most part, either fully insured or integrated with the local governments’ plans. The Company recognizes the funded status of defined benefit pension and other postretirement plans on its Consolidated Balance Sheets and also, recognizes as a component of AOCI, net of tax, the gains or losses and prior service costs that arise during the period but are not recognized as components of net periodic benefit cost. In addition, the Company recognizes a settlement charge in its Consolidated Statements of Operations when certain events occur, including plan termination or the settlement of certain plan liabilities. A settlement charge represents the immediate recognition into expense of a portion of the unrecognized loss within AOCI on the balance sheet in proportion to the share of the projected benefit obligation that was settled. The measurement date for the Company’s postretirement benefits plan is December 31. The Company’s global pension investment policies are designed to ensure that pension assets are invested in a manner consistent with meeting the future benefit obligations of the pension plans and maintaining compliance with various laws and regulations including the Employee Retirement Income Security Act of 1974. The Company establishes strategic asset allocation percentage targets and benchmarks for significant asset classes with the aim of achieving a prudent balance between return and risk. The Company’s investment horizon is generally long term, and, accordingly, the target asset allocations encompass a long-term perspective of capital markets, expected risk and return and perceived future economic conditions while also considering the profile of plan liabilities. To the extent feasible, the short-term investment portfolio is managed to match the short-term obligations, the intermediate portfolio duration is matched to reduce the risk of volatility in intermediate plan distributions, and the total return portfolio is managed to maximize the long-term real growth of plan assets. The critical investment principles of diversification, assessment of risk and targeting the optimal expected returns for given levels of risk are applied. The Company’s investment guidelines prohibit the use of securities such as letter stock and other unregistered securities, commodities or commodity contracts, short sales, margin transactions, private placements (unless specifically addressed by addendum), or any derivatives, options or futures for the purpose of portfolio leveraging. The target asset allocation is reviewed periodically and is determined based on a long-term projection of capital market outcomes, inflation rates, fixed income yields, returns, volatilities and correlation relationships. The interaction between plan assets and benefit obligations is periodically studied to assist in establishing such strategic asset allocation targets. Asset performance is monitored with an overall expectation that plan assets will meet or exceed benchmark performance over rolling five-year periods. The Company’s pension committee, as authorized by the Company’s Board, has discretion to manage the assets within established asset allocation ranges approved by senior management of the Company.
Derivatives	Derivatives: The Company uses interest rate swap agreements to manage risk, including exposure to variability in interest payments associated with its variable rate debt. Interest rate swaps are designated as cash flow hedges and, as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur. The Company uses fixed-for-fixed cross-currency swap agreements to manage risk, including to hedge the variability of exchange rates of our foreign net investments. The fixed-for-fixed cross-currency swap agreements are designated as net investment hedges and, as such, the agreements are marked to market at each reporting date and any unrealized gains or losses are included in unrealized currency translation adjustments, within AOCI. The Company uses the spot method to evaluate the effectiveness of the net investment hedges. The Company uses foreign exchange forward contracts to economically hedge the impact of variability in exchange rates on certain assets and/or liabilities denominated in foreign currencies. Forward contracts are marked-to-market at each reporting date, with changes in the fair value of the underlying instruments, as well as gains and losses on the hedged foreign currency transactions, recognized in earnings in Other (expense) income, net. The fair value of forward contracts are determined from sources independent of the Company, including the financial institutions which are party to the derivative instruments.
Environmental liabilities and expenditures	Environmental liabilities and expenditures: Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimable. If there is a range of estimated liability and no amount in that range is considered more probable than another, then the Company records the lowest amount in the range. Environmental costs and remediation costs are capitalized if the costs extend the life, increase the capacity or improve safety or efficiency of the property from the date acquired or constructed, and/or mitigate or prevent contamination in the future.
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted	Recently Adopted Accounting Standards The Company has adopted Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures beginning with the 2024 Form 10-K and the Form 10-Q for the period ended March 31, 2025. This ASU expands reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses, defined as those expenses that are regularly provided to the Chief Operating Decision Maker (“CODM”) and included in the reported measure of segment profit or loss. The Company disclosed that the CODM assesses segment performance and makes decisions about allocating resources to its operating segments using segment operating earnings. Based on the Company’s assessment, the Company determined that product costs are significant segment expenses that are regularly provided to the CODM and included in segment operating earnings. See Note 4, Business Segments, for additional information. The Company has adopted ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures on a prospective basis in this Report. Pursuant to this ASU, the Company disclosed additional information in specified categories with respect to the reconciliation of the effective tax rate to the statutory rate (the “rate reconciliation”) for federal, state, and foreign income taxes, which required greater detail about individual reconciling items in the rate reconciliation to the extent the impact of those items exceeded a specified threshold. Additionally, the Company disclosed income taxes paid disaggregated by federal, state, and foreign taxes and further disaggregated these disclosures in certain jurisdictions where income taxes paid exceeded a certain threshold. See Note 10, Income Taxes, for additional information. Recently Issued Accounting Standards Not Yet Adopted The FASB issued ASU 2024-03, Income Statement- Reporting Comprehensive Income- Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses in November 2024. This ASU requires public business entities (“PBEs”) to disclose, in interim and annual reporting periods, additional information about certain expenses in the notes to the financial statements, including disclosing the amounts of purchases of inventory, employee compensation, depreciation, and intangible asset amortization in each relevant expense caption. It also requires PBEs to disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively and to disclose the total amount of selling expenses, and in the annual reporting periods, an entity’s definition of selling expenses. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements. The FASB issued ASU 2025-06, Intangibles- Goodwill and Other- Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software in September 2025. This ASU removes all references to prescriptive and sequential software development stages and will now require PBEs to start capitalizing software costs when management has authorized and committed to funding the software project and it is probable that the project will be completed and the software will be used to perform the function intended. The ASU also specifies that the disclosures in Subtopic 360-10, Property, Plant, and Equipment- Overall are required for all capitalized internal-use software costs. ASU 2025-06 is effective for fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements. The FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements in December 2025. This ASU amends Topic 270, by improving the navigability of the required interim disclosures and clarifying when that guidance is applicable. The amendments also provide additional guidance on what disclosures should be provided in interim reporting periods. Additionally, the amendment requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the disclosure requirements of this standard and the impact on its consolidated financial statements.

Investment in Associated Companies (Tables)

12 Months Ended

Dec. 31, 2025

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

The following table is a summary of equity income in associated companies by investment for the years ending December 31, 2025, 2024 and 2023:



	2025		2024		2023
Houghton Korea	$	9,185	$	6,795	$	11,442
Nippon Japan	1,085		925		1,492
Kelko Panama	370		321		309

SKT	265		—		—
Primex	4,272		2,930		2,090
Total equity in net income of associated companies	$	15,177	$	10,971	$	15,333

Hedging Activities

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Hedging Activities

The Company’s ongoing business operations expose it to various risks, including fluctuating foreign exchange rates and interest rate risk. To manage these risks, the Company periodically enters into derivative financial instruments, such as foreign exchange forward contracts, interest rate swap agreements, and cross-currency swap agreements. The Company does not hold or enter into derivative financial instruments for trading or speculative purposes.

Foreign Exchange Forward Contracts

The Company uses foreign exchange forward contracts to economically hedge the impact of the variability in exchange rates on certain assets and/or liabilities denominated in foreign currencies. These forward contracts are marked-to-market at each reporting date. Changes in the fair value of the underlying instrument and settlements are recognized in earnings in Other (expense) income, net. The fair value of the forward contract is determined from sources independent of the Company, including the financial institutions which are party to the derivative instruments.

Open foreign exchange forward contracts as of December 31, 2025 were entered into as hedges of Japanese yen and Mexican peso against the U.S. dollar and had the following notional U.S. dollar values:


Currency	December 31, 2025
Mexican Peso	$	12,500
Japanese Yen	15,300
Total	$	27,800

In connection with the acquisition of Dipsol as described in Note 2, Business Combinations, in March 2025, the Company entered into multiple foreign exchange forward contracts with various financial institutions with an aggregate notional amount totaling $155.3 million to hedge the variability of exchange rate impacts between the U.S. Dollar and Japanese yen. These foreign exchange forward contracts settled on April 1, 2025. The Company recognized a $1.4 million foreign currency loss during the year ended December 31, 2025 in Other (expense) income, net relating to the change in fair value of these instruments as of the settlement date.

Open foreign exchange forward contracts as of December 31, 2025 had maturities occurring over a period of one month.

Interest Rate Swaps

In order to manage the Company’s exposure to variable interest rate risk associated with the Credit Facility, such as the Secured Overnight Financing Rate (“SOFR”), in the first quarter of 2023, the Company entered into $300.0 million notional amounts of three year interest rate swaps to convert a portion of the Company’s variable rate borrowings into a fixed rate obligation. See Note 19, Debt, for additional information.

These interest rate swaps are designated as cash flow hedges and, as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective and reclassified to interest expense in the period during which the hedged transaction affects earnings or it becomes probable that the forecasted transaction will not occur. Interest rate swaps are entered into with a limited number of counterparties within several tranches, each of which allows for net settlement of all contracts through a single payment to participating counterparties in a single currency in the event of a default or termination of any one contract. As such, in accordance with the Company’s accounting policy, these derivative instruments are recorded on a net basis within the Consolidated Balance Sheets.

Net Investment Hedges

In June 2025, the Company entered into a fixed-for-fixed cross currency swap for a notional amount of $75.0 million to hedge the variability of exchange rate impacts between the U.S. Dollar and the European euro. Under the terms of the cross-currency swap agreement, the Company notionally exchanged $75.0 million at an interest rate of 1.9% for 65.8 million EUR at an interest rate of 0.0%. The cross-currency swap is designated as a net investment hedge on a pre-tax basis and expires in June 2027.

In April 2025, the Company entered into fixed-for-fixed cross currency swaps with an aggregate notional amount totaling $100.0 million to hedge the variability of exchange rate impacts between the U.S. Dollar and Japanese yen. Under the terms of the cross-currency swap agreements, the Company notionally exchanged $100.0 million at a weighted average interest rate of 3.1% for 14.3 billion JPY at a weighted average interest rate of 0.0%. The cross-currency swaps are designated as net investment hedges on an after-tax basis and expire in April 2028.

The fixed-for-fixed cross-currency swaps are marked to market at each reporting date and any unrealized gains or losses are included in unrealized currency translation adjustments, within AOCI. The Company uses the spot method to evaluate the effectiveness of the net investment hedges.

The fair value of the Company’s interest rate swaps, forward exchange contracts, and cross-currency swap agreements are determined from sources independent of the Company, including the financial institutions which are party to the derivative instruments, using standard pricing models that consider the value of future cash flows as of the balance sheet date, discounted to a present value using discount factors that match both the time to maturity and currency of the underlying instruments. These standard pricing models utilize inputs that are derived from or corroborated by observable market data such as interest rate yield curves as well as currency spot and forward rates; therefore, the fair value of our derivatives is classified as a Level 2 measurement. The balance sheet classification and fair values of the Company’s derivative instruments are as follows:


Derivative instruments	Consolidated Balance Sheet Location	December 31,
		2025		2024

Net investment hedges	Other non-current assets	$	10,053	$	—
Net investment hedges	Other non-current liabilities	1,541		—
Interest rate swaps	Prepaid expenses and other current assets	16		—
Interest rate swaps	Other non-current assets	—		1,621
Foreign currency forward contracts	Other accrued liabilities	5		67

The following table presents the net unrealized gain deferred to AOCI:


		December 31,
Derivative instruments:	Consolidated Balance Sheet Location	2025		2024
Net investment hedges	AOCI	$	6,554	$	—
Interest rate swaps	AOCI	13		1,248

The following table presents the net gain (loss) recognized in the Company’s Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


		For the Years Ended December 31,
Derivative instruments	Condensed Consolidated Statements of Operations	2025		2024		2023
Net investment hedges	Interest expense	$	2,951	$	—	$	—
Interest rate swaps	Interest expense	1,887		4,770		3,555
Foreign exchange forward contracts	Other (expense) income, net	1,880		(2,026)		2,134
Total		$	6,718	$	2,744	$	5,689

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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+ Details

Goodwill and Other Intangible Assets - Schedule of Amortization Expense (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
For the year ended December 31, 2026	$ 64,010
For the year ended December 31, 2027	63,670
For the year ended December 31, 2028	63,195
For the year ended December 31, 2029	62,045
For the year ended December 31, 2030	$ 60,897

Net Sales and Revenue Recognition

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Net Sales and Revenue Recognition

Customer Concentration

A significant portion of the Company’s revenues are realized from the sale of process fluids and services to manufacturers of steel, aluminum, automotive, aerospace, industrial and agricultural equipment, and durable goods. During the year ended December 31, 2025, the Company’s five largest customers (each composed of multiple subsidiaries or divisions with semiautonomous purchasing authority) accounted for approximately 11% of consolidated net sales, with its largest customer accounting for approximately 3% of consolidated net sales.

Contract Assets and Liabilities

The Company had no material contract assets recorded on its Consolidated Balance Sheets as of December 31, 2025 and 2024.

The Company had approximately $3.6 million and $4.2 million of deferred revenue as of December 31, 2025 and 2024, respectively. During the years ended December 31, 2025 and 2024, the Company satisfied materially all of the associated performance obligations and recognized into revenue the advance payments received and recorded as of December 31, 2024 and 2023, respectively.

Disaggregated Revenue

The Company sells its industrial process fluids, specialty chemicals and technical expertise as a global product portfolio. The Company generally manages and evaluates its performance by reportable segment first, and then by customer industries. Net sales of each of the Company’s major product lines are generally spread throughout all three of the Company’s segments, and in most cases, approximately proportionate to the level of total sales in each segment.

The following tables present disaggregated information regarding the Company’s net sales, first by major product lines that represent more than 10% of the Company’s consolidated net sales for the years ended December 31, 2025, 2024 and 2023, and followed then by a disaggregation of the Company’s net sales by segment and customer industry for the years ended December 31, 2025, 2024 and 2023.


Major Product Line	2025		2024		2023
Metal removal fluids	19.0	%	22.4	%	23.6	%
Rolling lubricants	18.3	%	20.5	%	19.5	%
Hydraulic fluids	12.2	%	14.2	%	14.1	%
Surface solutions	10.9	%	5.2	%	5.0	%


	Net sales for the year ending December 31, 2025
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	255,281	$	138,908	$	216,354	$	610,543
Metalworking and other	610,051		409,202		258,838		1,278,091
	$	865,332	$	548,110	$	475,192	$	1,888,634


	Net sales for the year ending December 31, 2024
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	258,818	$	135,373	$	207,324	$	601,515
Metalworking and other	623,313		401,062		213,796		1,238,171
	$	882,131	$	536,435	$	421,120	$	1,839,686


	Net sales for the year ending December 31, 2023
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	268,174	$	136,979	$	195,578	$	600,731
Metalworking and other	708,921		434,368		209,293		1,352,582
	$	977,095	$	571,347	$	404,871	$	1,953,313

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Basis of Presentation and Significant Accounting Policies - Hyper-inflationary Accounting (Details) - Argentina - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Concentration Risk [Line Items]
Inflationary (as a percent)	100.00%
Argentine and Turkish Subsidiaries
Concentration Risk [Line Items]
Currency conversion impacts of hyper-inflationary accounting	$ 2.2	$ 0.8	$ 7.8
Argentine and Turkish Subsidiaries \| Assets Total \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (as a percent)	1.00%
Argentine and Turkish Subsidiaries \| Sales Revenue Net \| Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk (as a percent)	2.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

+ References + Details

Other (Expense) income, net (Tables)

12 Months Ended

Dec. 31, 2025

Other Income and Expenses [Abstract]

Schedule of Other (Expense) income, net

Other (expense) income, net for the years ended December 31, 2025, 2024 and 2023 are as follows:


	2025		2024		2023
Income from third party license fees	$	842	$	810	$	1,210
Foreign exchange losses, net	(8,386)		(1,783)		(14,785)
Gain on disposals of property, plant, equipment and other assets, net	2,204		810		1,307
Non-income tax refunds and other related credits	2,922		3,742		1,339
Pension and postretirement benefit costs, non-service components	(1,676)		(1,827)		(2,033)
Facility remediation recoveries, net	—		—		2,141
Business interruption insurance proceeds	—		1,000		—
Product liability claim costs, net	—		(2,040)		—
Earnout liability adjustment	454		400		—
Interest income	2,594		—		—
Multiemployer plan withdrawal charge	(923)		—		—
Other non-operating income, net	60		242		149
Total other (expense) income, net	$	(1,909)	$	1,354	$	(10,672)

Business Segments - Schedule of Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,888,634	$ 1,839,686	$ 1,953,313
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	622,308	637,755	718,742
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	251,177	230,622	231,331
Other foreign operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,015,149	$ 971,309	$ 1,003,240

- Definition

+ References

+ Details

Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Accrued Liabilities, Current [Abstract]
Non-income taxes	$ 29,345	$ 25,455
Current income taxes payable (See Note 10)	10,929	12,772
Selling expenses and freight accruals	9,848	10,716
Short-term lease liabilities (See Note 6)	12,536	10,619
Professional fees, legal, and acquisition-related accruals	7,009	5,340
Customer advances and sales return reserves	4,833	3,855
Accrued insurance	3,851	6,041
Accrued environmental reserves (See Note 25)	$ 1,516	$ 1,235
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration]	Total other accrued liabilities	Total other accrued liabilities
Accrued interest (See Note 19)	$ 1,312	$ 1,289
Accrued rent and facilities	956	1,129
Multiemployer plan withdrawal charge (See Note 9)	901	0
Accrued non-pension benefits	678	833
Deferred acquisition payment (See Note 2)	538	0
Earnout liability (See Note 2)	0	1,160
Other	845	224
Total other accrued liabilities	$ 85,097	$ 80,668

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,401)	$ 116,729	$ 112,872
Other comprehensive income (loss), net of tax
Currency translation adjustments	88,376	(77,496)	16,725
Defined benefit retirement plans
Net (loss) gain arising during the period, other	(1,196)	105	(5,792)
Amortization of actuarial loss (gain)	258	301	(385)
Amortization of prior service cost	17	19	34
Current period change in fair value of derivatives	(1,235)	(159)	1,407
Unrealized (loss) gain on available-for-sale securities	(30)	(46)	1,817
Other comprehensive income (loss)	86,190	(77,276)	13,806
Comprehensive income	83,789	39,453	126,678
Less: Comprehensive income attributable to noncontrolling interest	(319)	(13)	(106)
Comprehensive income attributable to Quaker Chemical Corporation	$ 83,470	$ 39,440	$ 126,572

Income Taxes - Schedule of Classification of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Non-current deferred tax assets	$ 12,128	$ 9,216
Non-current deferred tax liabilities	140,814	138,828
Total net deferred tax liabilities	$ (128,686)	$ (129,612)

Equity - Schedule of Share-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Before-tax share-based compensation expense	$ 13,611	$ 14,991	$ 14,605
Income tax benefit	(1,661)	(2,222)	(2,742)
After-tax share-based compensation expense	$ 11,950	$ 12,769	$ 11,863

Basis of Presentation and Significant Accounting Policies - Research and Development Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Research and development costs	$ 60.7	$ 57.3	$ 50.3

Leases - Schedule of Lease Expense and Supplemental Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lease, Cost [Abstract]
Operating lease expense	$ 16,738	$ 15,096	$ 14,981
Short-term lease expense	572	807	760
Supplemental Cash Flow Information Related To Leases [Abstract]
Operating cash flows from operating leases	16,508	14,923	16,020
Leased right-of-use assets obtained in exchange for new operating lease liabilities	17,561	9,792	$ 10,044
Supplemental Balance Sheet Information [Abstract]
Right-of-use lease assets	38,737	34,120
Other accrued liabilities	$ 12,536	$ 10,619
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Long-term lease liabilities	$ 22,759	$ 20,028
Total operating lease liabilities	$ 35,295	$ 30,647
Weighted average remaining lease term (years)	5 years 8 months 12 days	5 years
Weighted average discount rate	6.58%	5.63%

Equity (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation

The Company recognized the following share-based compensation expense in its Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:


	2025		2024		2023





Before-tax share-based compensation expense	$	13,611	$	14,991	$	14,605
Income tax benefit	(1,661)		(2,222)		(2,742)
After-tax share-based compensation expense	$	11,950	$	12,769	$	11,863

Schedule of Stock Options Activity

Stock option activity under all plans is as follows:


	Number of Options	Weighted Average Exercise Price (per option)		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Options outstanding as of January 1, 2024	58,612	$	219.13

Options exercised	2,587	136.64
Options expired	5,661	189.17
Options outstanding as of December 31, 2025	50,364	$	196.23	2.4	$	—

Options exercisable as of December 31, 2025	50,364	$	196.23	2.4	$	—

Schedule of Restricted Stock Awards

Activity of restricted stock awards granted under the Company’s LTIP plan is shown below:


	Number of Shares	Weighted Average Grant Date Fair Value (per share)
Non-vested restricted stock awards, December 31, 2024	29,751	$	177.12
Granted	—	—
Vested	22,777	178.94
Forfeited	2,705	165.66
Non-vested restricted stock awards, December 31, 2025	4,269	$	174.72

Schedule of Restricted Stock Units

Activity of restricted stock units granted under the Company’s LTIP plan is shown below:


	Number of Units	Weighted Average Grant Date Fair Value (per unit)
Non-vested restricted stock units, December 31, 2024	68,630	$	182.90
Granted	84,479	125.35
Vested	32,004	154.21
Forfeited	10,059	151.42
Non-vested restricted stock units, December 31, 2025	111,046	$	150.24

Schedule of Restricted Stock Units, Valuation Assumptions

The fair value of RSUs subject to a performance modifier is valued using a Monte Carlo simulation on the grant date and used the following assumptions set below:


	December 2024 Grant
Risk-free interest rate	4.21	%
Dividend yield	0.00%
Expected term (years)	3.0

Schedule of Activity Performance Stock Units

Activity of performance stock units granted under the Company’s LTIP plan is shown below:


	Number of Units	Weighted Average Grant Date Fair Value (per unit)
Non-vested performance stock units, December 31, 2024	55,693	$	216.51
Granted	56,347	139.67
Vested	—	—
Forfeited	7,967	120.62
Non-vested performance stock units, December 31, 2025	104,073	$	195.42

Schedule of Monte Carlo Option Pricing Model and Assumptions

The grant-date fair value of the PSUs valued using a Monte Carlo simulation included the following assumptions set forth in the table below:


	March 2025 Grant		March 2024 Grant		March 2023 Grant

Risk-free interest rate	3.96	%	4.55	%	3.85	%
Dividend yield	1.51	%	0.91	%	0.96	%
Expected term (years)	3.0		3.0		3.0

Goodwill and Other Intangible Assets - Schedule of Gross Carrying Amounts and Accumulated Amortization for Definite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,107,967	$ 995,271
Accumulated Amortization	435,616	353,486
Net Book Value	672,351	641,785
Customer lists and rights to sell
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	901,662	829,255
Accumulated Amortization	351,859	285,450
Net Book Value	549,803	543,805
Trademarks, formulations and product technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	199,434	160,257
Accumulated Amortization	77,521	62,373
Net Book Value	121,913	97,884
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,871	5,759
Accumulated Amortization	6,236	5,663
Net Book Value	$ 635	$ 96

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Net Sales and Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue


Major Product Line	2025		2024		2023
Metal removal fluids	19.0	%	22.4	%	23.6	%
Rolling lubricants	18.3	%	20.5	%	19.5	%
Hydraulic fluids	12.2	%	14.2	%	14.1	%
Surface solutions	10.9	%	5.2	%	5.0	%


	Net sales for the year ending December 31, 2025
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	255,281	$	138,908	$	216,354	$	610,543
Metalworking and other	610,051		409,202		258,838		1,278,091
	$	865,332	$	548,110	$	475,192	$	1,888,634


	Net sales for the year ending December 31, 2024
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	258,818	$	135,373	$	207,324	$	601,515
Metalworking and other	623,313		401,062		213,796		1,238,171
	$	882,131	$	536,435	$	421,120	$	1,839,686


	Net sales for the year ending December 31, 2023
	Americas		EMEA		Asia/Pacific		Consolidated Total
Customer Industries
Metals	$	268,174	$	136,979	$	195,578	$	600,731
Metalworking and other	708,921		434,368		209,293		1,352,582
	$	977,095	$	571,347	$	404,871	$	1,953,313

Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024 were as follows:


	Americas		EMEA		Asia/Pacific		Total
Balance as of December 31, 2023	283,103		65,940		163,475		512,518
Goodwill recognized for Sutai acquisition	—		—		5,511		5,511
Goodwill recognized for IKV	—		16,448		—		16,448
Currency translation adjustments	(6,228)		(1,984)		(7,371)		(15,583)
Balance as of December 31, 2024	276,875		80,404		161,615		518,894
Goodwill recognized for Dipsol acquisition	5,770		380		46,909		53,059
Goodwill recognized for Natech acquisition	—		2,625		—		2,625
Goodwill recognized for CSI acquisition	—		1,721		—		1,721
Goodwill recognized for Sutai acquisition (1)	—		—		(233)		(233)
Currency translation adjustments	4,383		3,710		6,401		14,494
Goodwill impairments	—		(88,840)		—		(88,840)
Balance as of December 31, 2025	$	287,028	$	—	$	214,692	$	501,720

(1) During the year ended December 31, 2025, the Company finalized the working capital settlements which impacted the goodwill recorded. See Note 2, Business Combinations, for additional information.


	2025		2024		2023
Goodwill, gross	$	694,311	$	611,498	$	609,571
Accumulated impairment losses (1)	(192,591)		(92,604)		(97,053)
Goodwill, net	$	501,720	$	518,894	$	512,518

Schedule of Gross Carrying Amounts and Accumulated Amortization for Definite-Lived Intangible Assets

Gross carrying amounts and accumulated amortization for definite-lived intangible assets as of December 31, 2025 and 2024 were as follows:


	Gross Carrying Amount				Accumulated Amortization				Net Book Value
	2025		2024		2025		2024		2025		2024
Customer lists and rights to sell	$	901,662	$	829,255	$	351,859	$	285,450	$	549,803	$	543,805
Trademarks, formulations and product technology	199,434		160,257		77,521		62,373		121,913		97,884
Other	6,871		5,759		6,236		5,663		635		96
Total definite-lived intangible assets	$	1,107,967	$	995,271	$	435,616	$	353,486	$	672,351	$	641,785

Schedule of Amortization Expense

Amortization expense is recorded within SG&A in the Company’s Consolidated Statements of Operations. Estimated annual aggregate amortization expense for the subsequent five years is as follows:


For the year ended December 31, 2026	$	64,010
For the year ended December 31, 2027	63,670
For the year ended December 31, 2028	63,195
For the year ended December 31, 2029	62,045
For the year ended December 31, 2030	60,897

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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-Name Accounting Standards Codification
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-Publisher FASB
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

+ Details

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Key cybersecurity risks are incorporated into our enterprise risk management framework. Our cybersecurity risk management program leverages the National Institute of Standards and Technology (“NIST”) framework, which organizes cybersecurity risk management actions into six categories: govern, identify, protect, detect, respond, and recover. The Company’s cybersecurity risk management program and strategy includes the following: •Cybersecurity Operations Centers - We, along with certain third-parties, operate several global cybersecurity operations centers, which provide 24/7 monitoring and incident response capabilities. In the event of an alert, our cybersecurity operations centers coordinate the investigation and remediation of such alerts. •Partnerships with Cybersecurity Companies - We partner with specialized cybersecurity companies and organizations, leveraging third-party technology and expertise. These partnerships help monitor and maintain the performance and effectiveness of our cybersecurity tools and program. •Annual and Periodic Assessments by Third Parties - Our cyber risk management program undergoes periodic assessments by third parties including annual penetration and disaster recovery tests. •Policies and Training - We maintain company-wide policies and procedures concerning cybersecurity, which are reviewed and approved by appropriate management members. All employees are required to complete cybersecurity training periodically, with additional specialized trainings for certain roles. We conduct monthly phishing simulation exercises with mandatory training on failure. •Incident Response - In case of a cybersecurity incident, we follow a documented incident response process, which outlines steps from detection to mitigation, recovery, and notification, including notifying senior leadership and the Board as appropriate based on severity. •Third-Party Service Providers - In addition to assessing our own cybersecurity preparedness, we also consider and evaluate cybersecurity risks associated with use of third-party service providers. We assess third party cybersecurity controls through a cybersecurity questionnaire and include security and privacy addendums to our contracts where applicable.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Key cybersecurity risks are incorporated into our enterprise risk management framework. Our cybersecurity risk management program leverages the National Institute of Standards and Technology (“NIST”) framework, which organizes cybersecurity risk management actions into six categories: govern, identify, protect, detect, respond, and recover.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Board, primarily through the Audit Committee, oversees management's approach to managing cybersecurity risks. Management provides cybersecurity updates to the Audit Committee, at least quarterly, and material cybersecurity incidents are reported to the Board. Quaker Houghton has a dedicated Global Cyber Security team led by the Senior Director, Cybersecurity and Compliance that is responsible for identifying, assessing, monitoring, managing and communicating the Company’s cybersecurity risks. Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking. The Global Cyber Security team reports to the Chief Digital Information Officer (“CDIO”), who reports to the Chief Financial Officer (“CFO”), who in turn reports to the Chief Executive Officer (“CEO”). Refer to the “Information about our Executive Officers” section, which appears in Item 4(a) of this report for more information about the CDIO’s relevant professional experience and qualifications.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board, primarily through the Audit Committee, oversees management's approach to managing cybersecurity risks. Management provides cybersecurity updates to the Audit Committee, at least quarterly, and material cybersecurity incidents are reported to the Board. Quaker Houghton has a dedicated Global Cyber Security team led by the Senior Director, Cybersecurity and Compliance that is responsible for identifying, assessing, monitoring, managing and communicating the Company’s cybersecurity risks. Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Board, primarily through the Audit Committee, oversees management's approach to managing cybersecurity risks. Management provides cybersecurity updates to the Audit Committee, at least quarterly, and material cybersecurity incidents are reported to the Board. Quaker Houghton has a dedicated Global Cyber Security team led by the Senior Director, Cybersecurity and Compliance that is responsible for identifying, assessing, monitoring, managing and communicating the Company’s cybersecurity risks. Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking. The Global Cyber Security team reports to the Chief Digital Information Officer (“CDIO”), who reports to the Chief Financial Officer (“CFO”), who in turn reports to the Chief Executive Officer (“CEO”). Refer to the “Information about our Executive Officers” section, which appears in Item 4(a) of this report for more information about the CDIO’s relevant professional experience and qualifications.
Cybersecurity Risk Role of Management [Text Block]	Key cybersecurity risks are incorporated into our enterprise risk management framework. Our cybersecurity risk management program leverages the National Institute of Standards and Technology (“NIST”) framework, which organizes cybersecurity risk management actions into six categories: govern, identify, protect, detect, respond, and recover. The Company’s cybersecurity risk management program and strategy includes the following: •Cybersecurity Operations Centers - We, along with certain third-parties, operate several global cybersecurity operations centers, which provide 24/7 monitoring and incident response capabilities. In the event of an alert, our cybersecurity operations centers coordinate the investigation and remediation of such alerts. •Partnerships with Cybersecurity Companies - We partner with specialized cybersecurity companies and organizations, leveraging third-party technology and expertise. These partnerships help monitor and maintain the performance and effectiveness of our cybersecurity tools and program. •Annual and Periodic Assessments by Third Parties - Our cyber risk management program undergoes periodic assessments by third parties including annual penetration and disaster recovery tests. •Policies and Training - We maintain company-wide policies and procedures concerning cybersecurity, which are reviewed and approved by appropriate management members. All employees are required to complete cybersecurity training periodically, with additional specialized trainings for certain roles. We conduct monthly phishing simulation exercises with mandatory training on failure. •Incident Response - In case of a cybersecurity incident, we follow a documented incident response process, which outlines steps from detection to mitigation, recovery, and notification, including notifying senior leadership and the Board as appropriate based on severity. •Third-Party Service Providers - In addition to assessing our own cybersecurity preparedness, we also consider and evaluate cybersecurity risks associated with use of third-party service providers. We assess third party cybersecurity controls through a cybersecurity questionnaire and include security and privacy addendums to our contracts where applicable.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Board, primarily through the Audit Committee, oversees management's approach to managing cybersecurity risks. Management provides cybersecurity updates to the Audit Committee, at least quarterly, and material cybersecurity incidents are reported to the Board. Quaker Houghton has a dedicated Global Cyber Security team led by the Senior Director, Cybersecurity and Compliance that is responsible for identifying, assessing, monitoring, managing and communicating the Company’s cybersecurity risks. Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The Board, primarily through the Audit Committee, oversees management's approach to managing cybersecurity risks. Management provides cybersecurity updates to the Audit Committee, at least quarterly, and material cybersecurity incidents are reported to the Board. Quaker Houghton has a dedicated Global Cyber Security team led by the Senior Director, Cybersecurity and Compliance that is responsible for identifying, assessing, monitoring, managing and communicating the Company’s cybersecurity risks. Collectively this team has decades of dedicated cybersecurity experience with personnel experienced and certified in various disciplines, including data security and privacy, enterprise risk management, cloud security and ethical hacking. The Global Cyber Security team reports to the Chief Digital Information Officer (“CDIO”), who reports to the Chief Financial Officer (“CFO”), who in turn reports to the Chief Executive Officer (“CEO”). Refer to the “Information about our Executive Officers” section, which appears in Item 4(a) of this report for more information about the CDIO’s relevant professional experience and qualifications.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Other (Expense) income, net - Schedule of Other (Expense) income, net (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Income and Expenses [Abstract]
Income from third party license fees		$ 842	$ 810	$ 1,210
Foreign exchange losses, net		(8,386)	(1,783)	(14,785)
Gain on disposals of property, plant, equipment and other assets, net		2,204	810	1,307
Non-income tax refunds and other related credits		2,922	3,742	1,339
Pension and postretirement benefit costs, non-service components		(1,676)	(1,827)	(2,033)
Facility remediation recoveries, net		0	0	2,141
Business interruption insurance proceeds	$ 1,000	0	1,000	0
Product liability claim costs, net		0	(2,040)	0
Earnout liability adjustment		454	400	0
Interest income		2,594	0	0
Multiemployer plan withdrawal charge		(923)	0	0
Other non-operating income, net		60	242	149
Total other (expense) income, net		$ (1,909)	$ 1,354	$ (10,672)

Debt

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Debt

Debt as of December 31, 2025 and 2024 includes the following:


	As of December 31, 2025			As of December 31, 2024
	Interest Rate	Outstanding Balance		Interest Rate	Outstanding Balance
Credit Facilities:
Revolver	4.95%	229,088		4.00%	48,820
U.S. Term Loan	5.10%	482,144		5.62%	508,863
EURO Term Loan	3.13%	148,477		4.00%	138,767
Industrial development bonds	5.26%	10,000		5.26%	10,000
Bank lines of credit and other debt obligations	Various	1,501		Various	1,817
Total debt		$	871,210		$	708,267
Less: debt issuance costs		(652)			(1,099)
Less: short-term and current portion of long-term debts		(35,657)			(37,554)
Total long-term debt		$	834,901		$	669,614

Credit facilities

During June 2022, the Company and its wholly owned subsidiary, Quaker Houghton B.V., as borrowers, Bank of America, N.A., as administrative agent, U.S. Dollar swing line lender and letter of credit issuer, Bank of America Europe Designated Active Company, as Euro Swing Line Lender, certain guarantors and other lenders entered into an amendment to its primary credit facility (the “Original Credit Facility”). The amended credit facility (“Credit Facility”) established (A) a new $150.0 million Euro equivalent senior secured term loan (the “Euro Term Loan”), (B) a new $600.0 million senior secured term loan (the “U.S. Term Loan”), and (C) a new $500.0 million senior secured revolving credit facility (the “Revolver”), each maturing in June 2027. The Company has the right to increase the amount of the Credit Facility by an aggregate amount not to exceed the greater of $300.0 million or 100% of Consolidated EBITDA, subject to certain conditions including the agreement to provide financing by any lender providing such increase.

The Company used the proceeds of the Credit Facility to repay all outstanding loans under the Original Credit Facility, unpaid accrued interest and fees on the closing date under the Original Credit Facility and certain expenses and fees. U.S. Dollar-denominated borrowings under the Credit Facility bear interest, at the Company’s election, at the base rate or term SOFR plus an applicable rate ranging from 1.00% to 1.75% for term SOFR loans and from 0.00% to 0.75% for base rate loans, depending upon the Company’s consolidated net leverage ratio. Loans based on term SOFR also include a spread adjustment equal to 0.10% per annum. Borrowings under the Credit Facility denominated in currencies other than U.S. Dollars bear interest at the alternative currency term rate plus the applicable rate ranging from 1.00% to 1.75%.

The Credit Facility contains affirmative and negative covenants, financial covenants and events of default, including without limitation restrictions on (a) the incurrence of additional indebtedness; (b) investments in and acquisitions of other businesses, lines of business and divisions; (c) the making of dividends or capital stock purchases; and (d) dispositions of assets. Dividends and share repurchases are permitted in annual amounts not exceeding the greater of $75 million annually and 25% of Consolidated EBITDA if there is no default. If the consolidated net leverage ratio is less than 2.50 to 1.00, then the Company is no longer subject to restricted payments.

Financial covenants contained in the Credit Facility include a consolidated interest coverage ratio test and a consolidated net leverage ratio test. The consolidated net leverage ratio at the end of a quarter may not be greater than 4.00 to 1.00, subject to a permitted increase during a four-quarter period after certain acquisitions. The Company has the option of replacing the consolidated net leverage ratio test with a consolidated senior net leverage ratio test if the Company issues certain types of unsecured notes, subject to certain limitations. Events of default in the Credit Facility include without limitation defaults for non-payment, breach of representations and warranties, non-performance of covenants, cross-defaults, insolvency, and a change of control in certain circumstances. The occurrence of an event of default under the Credit Facility could result in all loans and other obligations becoming immediately due and payable and the Credit Facility being terminated. As of December 31, 2025 and December 31, 2024, the Company was in compliance with all of the Credit Facility covenants.

The weighted average variable interest rate incurred on the outstanding borrowings under the Credit Facility during the twelve months ended December 31, 2025 was approximately 5.2%. As of December 31, 2025, the interest rate on the outstanding borrowings under the Credit Facility was approximately 4.7%. As part of the Credit Facility, the Company is required to pay an annual commitment fee ranging from 0.150% to 0.275% related to unutilized commitments under the Revolver, depending on the Company’s consolidated net leverage ratio. The Company had unused capacity under the Revolver of approximately $268.5 million, which is net of bank letters of credit of approximately $2.5 million, as of December 31, 2025.

In order to manage the Company’s exposure to variable interest rate risk associated with the Credit Facility, in the first quarter of 2023, the Company entered into $300.0 million notional amounts of three-year interest rate swaps to convert a portion of the Company’s variable rate borrowings into an average fixed rate obligation of 3.64% plus an applicable margin as provided in the Credit Facility based on the Company’s consolidated net leverage ratio. As of December 31, 2025, the aggregate interest rate on the swaps, including the fixed base rate plus the applicable margin, was 5.0%. See Note 24, Hedging Activities, for additional information.

The Company capitalized third-party and credit debt issuance costs attributed to the Euro Term Loan, U.S. Term Loan and Revolver during the second quarter of 2022. Capitalized costs attributed to the Euro Term Loan and U.S. Term Loan are recorded as a direct offset to Long-term debt on the Consolidated Balance Sheets. Capitalized costs attributed to the Revolver are recorded within Other assets on the Consolidated Balance Sheets. These capitalized costs are amortized into Interest expense over the five year term of the Credit Facility. As of December 31, 2025 and 2024, the Company had $0.7 million and $1.1 million, respectively, of debt issuance costs recorded as a reduction of Long-term debt and $1.4 million and $2.4 million, respectively, of debt issuance costs recorded within Other assets.

Industrial development bonds

As of December 31, 2025 and 2024, the Company had fixed rate, industrial development authority bonds totaling $10.0 million in principal amount due in 2028. These bonds have similar covenants to the Credit Facility noted above.

Bank lines of credit and other debt obligations

The Company has certain unsecured bank lines of credit and discounting facilities in certain foreign subsidiaries, which are not collateralized. The Company’s other debt obligations primarily consist of certain domestic and foreign low interest rate or interest-free municipality-related loans, local credit facilities of certain foreign subsidiaries and finance lease obligations. Total unused capacity under these arrangements as of December 31, 2025, was approximately $57.4 million.

In addition to the bank letters of credit described in the “Credit facilities” subsection above, the Company’s other off-balance sheet arrangements include certain financial and other guarantees. The Company’s total bank letters of credit and guarantees outstanding as of December 31, 2025 were approximately $7 million.

The Company incurred the following debt related expenses included within Interest expense in the Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:



	2025		2024		2023
Interest expense	$	42,634	$	43,223	$	53,582
Amortization of debt issuance costs	1,413		1,413		1,413
Total	$	44,047	$	44,636	$	54,995

Based on the variable interest rates associated with the Credit Facility, as of December 31, 2025 and 2024, the amounts at which the Company’s total debt were recorded are not materially different from their fair market value.

As of December 31, 2025, annual principal maturities on long-term borrowings, including the current portion, are as follows:


For the year ended December 31, 2026	$	35,172
For the year ended December 31, 2027	824,624
For the year ended December 31, 2028	10,000
For the year ended December 31, 2029	—
For the year ended December 31, 2030	—
Total maturities on debt in the next five fiscal years	869,796

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Subparagraph (a)(3)
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
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-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
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-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
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Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/470/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Pension and Other Postretirement Benefits - Schedule of Cash Flow (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	$ 15,128
2027	13,772
2028	13,909
2029	14,707
2030	15,265
2031 to 2035	76,508
Foreign \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	7,246
2027	7,500
2028	7,707
2029	8,605
2030	9,309
2031 to 2035	48,766
U.S. \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	7,882
2027	6,272
2028	6,202
2029	6,102
2030	5,956
2031 to 2035	27,742
U.S. \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	179
2027	157
2028	145
2029	133
2030	122
2031 to 2035	$ 468

Net Sales and Revenue Recognition - Schedule of Major Product Lines (Details) - Sales Revenue Net - Top Customer Concentration Risk	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Metal removal fluids
Segment Reporting Information [Line Items]
Concentration risk (as a percent)	19.00%	22.40%	23.60%
Rolling lubricants
Segment Reporting Information [Line Items]
Concentration risk (as a percent)	18.30%	20.50%	19.50%
Hydraulic fluids
Segment Reporting Information [Line Items]
Concentration risk (as a percent)	12.20%	14.20%	14.10%
Surface solutions
Segment Reporting Information [Line Items]
Concentration risk (as a percent)	10.90%	5.20%	5.00%

- Definition

+ References + Details

Leases - Schedule of Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
For the year ended December 31, 2026	$ 14,135
For the year ended December 31, 2027	9,483
For the year ended December 31, 2028	6,599
For the year ended December 31, 2029	3,706
For the year ended December 31, 2030	2,296
For the year ended December 31, 2031 and beyond	8,051
Total lease payments	44,270
Less: imputed interest	(8,975)
Present value of lease liabilities	35,295	$ 30,647
Total lease commitment	$ 79,700

Basis of Presentation and Significant Accounting Policies - Income Taxes and Uncertain Tax Positions (Details)	12 Months Ended
	Dec. 31, 2025
Accounting Policies [Abstract]
Measurement of tax benefit, minimum likelihood of the largest amount being realized upon ultimate settlement	50.00%

Investments in Associated Companies

12 Months Ended

Dec. 31, 2025

Equity Method Investments and Joint Ventures [Abstract]

Investments in Associated Companies

As of December 31, 2025, the Company held a 50% investment in and had significant influence over Nippon Quaker Chemical, Ltd. (“Nippon Japan”), Kelko Quaker Chemical, S.A. (“Kelko Panama”) and Houghton Korea, held a 32% investment in and had significant influence over Primex, Ltd. (“Primex”), and a 30% investment in and had significant influence over Surteckariya (Thailand) Co., Ltd. (“SKT”), which was acquired as part of the Dipsol acquisition during the second quarter of 2025.

The carrying amount of the Company’s equity investments as of December 31, 2025 was $106.9 million, which includes investments of $65.6 million in Houghton Korea; $29.1 million in Primex; $6.7 million in Nippon Japan; $5.0 million in SKT, and $0.5 million in Kelko Panama. The carrying amount of the Company’s equity investments as of December 31, 2024 was $98.0 million, which includes investments of $66.3 million in Houghton Korea; $24.9 million in Primex; $6.3 million in Nippon Japan; and $0.5 million in Kelko Panama.

Dividends and distributions received from associated companies by investment were $8.8 million, $9.1 million, and $4.2 million in the years ended December 31, 2025, 2024 and 2023.

The following table is a summary of equity income in associated companies by investment for the years ending December 31, 2025, 2024 and 2023:



	2025		2024		2023
Houghton Korea	$	9,185	$	6,795	$	11,442
Nippon Japan	1,085		925		1,492
Kelko Panama	370		321		309

SKT	265		—		—
Primex	4,272		2,930		2,090
Total equity in net income of associated companies	$	15,177	$	10,971	$	15,333

CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	17,331,779	17,673,607
Common stock, shares outstanding (in shares)	17,331,779	17,673,607

Income Taxes - Schedule of Components of Expense and Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current:
Federal	$ 9,373	$ 15,276	$ 12,159
State	2,106	2,395	2,938
Foreign	43,556	41,662	51,930
Total current income tax expense	55,035	59,333	67,027
Deferred:
Federal	(11,411)	(4,385)	518
State	(310)	(24)	(163)
Foreign	(18,707)	(5,624)	(11,797)
Total deferred income tax expense	(30,428)	(10,033)	(11,442)
Taxes on income before equity in net income of associated companies	24,607	49,300	55,585
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
U.S.	(11,519)	17,167	14,520
Foreign	18,548	137,891	138,604
Income before taxes and equity in net income of associated companies	$ 7,029	$ 155,058	$ 153,124

Debt - Schedule of Annual Principal Maturities on Long-Term Borrowings (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
For the year ended December 31, 2026	$ 35,172
For the year ended December 31, 2027	824,624
For the year ended December 31, 2028	10,000
For the year ended December 31, 2029	0
For the year ended December 31, 2030	0
Total maturities on debt in the next five fiscal years	$ 869,796

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
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+ Details

Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of Debt

Debt as of December 31, 2025 and 2024 includes the following:


	As of December 31, 2025			As of December 31, 2024
	Interest Rate	Outstanding Balance		Interest Rate	Outstanding Balance
Credit Facilities:
Revolver	4.95%	229,088		4.00%	48,820
U.S. Term Loan	5.10%	482,144		5.62%	508,863
EURO Term Loan	3.13%	148,477		4.00%	138,767
Industrial development bonds	5.26%	10,000		5.26%	10,000
Bank lines of credit and other debt obligations	Various	1,501		Various	1,817
Total debt		$	871,210		$	708,267
Less: debt issuance costs		(652)			(1,099)
Less: short-term and current portion of long-term debts		(35,657)			(37,554)
Total long-term debt		$	834,901		$	669,614

Schedule of Debt Related Expenses

The Company incurred the following debt related expenses included within Interest expense in the Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023:



	2025		2024		2023
Interest expense	$	42,634	$	43,223	$	53,582
Amortization of debt issuance costs	1,413		1,413		1,413
Total	$	44,047	$	44,636	$	54,995

Schedule of Annual Principal Maturities on Long-Term Borrowings

As of December 31, 2025, annual principal maturities on long-term borrowings, including the current portion, are as follows:


For the year ended December 31, 2026	$	35,172
For the year ended December 31, 2027	824,624
For the year ended December 31, 2028	10,000
For the year ended December 31, 2029	—
For the year ended December 31, 2030	—
Total maturities on debt in the next five fiscal years	869,796

Fair Value Measures	12 Months Ended
Fair Value Measures	Dec. 31, 2025
Fair Value Disclosures [Abstract]
Fair Value Measures	Fair Value Measures Fair value is defined as an exit price, or the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows: • Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities. • Level 2 - Inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability. • Level 3 - Inputs that are unobservable for the asset or liability based on our own assumptions about the assumptions market participants would use in pricing the asset or liability. Refer to Note 24, Hedging Activities, for a description of the Company’s derivative instruments including the valuation techniques used to determine fair value and support for their classification within Level 2 of the fair value hierarchy. The Company values its long-term debt at fair value based quoted market prices for the same or similar issues, or on current rates offered to the company for debt of the same remaining maturities and terms. Due to the infrequency of trades, these inputs are considered to be Level 2 inputs. Based on the variable interest rates associated with the Credit Facility, as of December 31, 2025 and 2024, the amounts at which the Company’s total debt were recorded are not materially different from their fair market value. The Company values its company-owned life insurance policies at fair value based on quotes for like instruments with similar credit ratings and terms. As a result, the Company owns an immaterial remaining amount of company-owned life insurance policies as of the year ended December 31, 2025. Items Measured at Fair Value on Nonrecurring Basis The Company is also required to measure certain items, including intangible assets and goodwill, at fair value on a nonrecurring basis. For non-observable market values, the Company determines fair value using acceptable valuation principles, including the excess earnings, relief from royalty, lost profit, or cost methods. The determination of the estimated fair values of intangible assets and goodwill requires management’s judgment and involves the use of significant estimates and assumptions, including revenue growth rates, gross margin levels, operating expenses, the weighted average cost of capital (“WACC”), and royalty rates, among other items. See Note 15, Goodwill and Other Intangible Assets, for additional information.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

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-Topic 820
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-Paragraph 2
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table shows the reclassifications from and resulting balances of AOCI for the years ended December 31, 2025, 2024 and 2023:


	Currency Translation Adjustments(1)		Defined Benefit Pension Plans		Unrealized Gain (Loss) in Available-for- Sale Securities		Derivative Instruments		Total
Balance as of December 31, 2022	$	(132,161)	$	(4,595)	$	(1,484)	$	—	$	(138,240)
Other comprehensive income (loss) before reclassifications	16,744		(7,702)		1,753		1,828		12,623
Amounts reclassified from AOCI	—		(464)		547		—		83
Related tax amounts	—		2,023		(483)		(421)		1,119
Balance as of December 31, 2023	(115,417)		(10,738)		333		1,407		(124,415)
Other comprehensive (loss) income before reclassifications	(77,424)		250		(44)		(207)		(77,425)
Amounts reclassified from AOCI	—		265		(14)		—		251
Related tax amounts	—		(90)		12		48		(30)
Balance as of December 31, 2024	(192,841)		(10,313)		287		1,248		(201,619)
Other comprehensive income (loss) before reclassifications	90,102		(1,588)		(51)		(1,604)		86,859
Amounts reclassified from AOCI	—		363		13		—		376
Related tax amounts	(1,958)		304		8		369		(1,277)
Balance as of December 31, 2025	$	(104,697)	$	(11,234)	$	257	$	13	$	(115,661)

(1) Includes mark-to-market impacts associated with net investment hedges. See Note 24, Hedging Activities, for more information.

Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2025	Feb. 16, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-12019
Entity Registrant Name	QUAKER CHEMICAL CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-0993790
Entity Address, Address Line One	901 E. Hector Street
Entity Address, City or Town	Conshohocken
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19428-2380
City Area Code	610
Local Phone Number	832-4000
Title of 12(b) Security	Common Stock, $1 par value
Trading Symbol	KWR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 1,514,771,520
Entity Common Stock, Shares Outstanding		17,335,075
Documents Incorporated by Reference	Portions of the Registrant’s definitive Proxy Statement relating to the 2026 Annual Meeting of Shareholders are incorporated by reference into Part III.
Entity Central Index Key	0000081362
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 1.99	$ 1.88	$ 1.78

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment as of December 31, 2025 and 2024 were as follows:


	2025		2024
Land	$	35,651	$	25,143
Building and improvements	178,248		149,783
Machinery and equipment	321,879		272,188
Construction in progress	69,009		35,919
Property, plant and equipment, at cost	604,787		483,033
Less: accumulated depreciation	(291,364)		(253,501)
Total property, plant and equipment, net	$	313,423	$	229,532

As of December 31, 2025 and 2024, PP&E includes $1.4 million and $1.0 million, respectively, of finance lease assets and future minimum lease payments. See Note 6, Leases, for additional information.

The Company recorded $30.4 million. $25.9 million, and $23.8 million of depreciation expense during the years ended December 31, 2025, 2024 and 2023, respectively.

Accounts Receivable and Allowance for Credit Losses - Accounts Receivable - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Receivables [Abstract]
Gross trade accounts receivable	$ 432.1	$ 413.7