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Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2018 shares
Document And Entity Information [Abstract]
Document Type	10-Q
Document period end date	Sep. 30, 2018
Amendment flag	false
Document Fiscal Year Focus	2018
Document Period Focus	Q3
Current fiscal year end date	--12-31
Entity central index key	0000081362
Entity current reporting status	Yes
Entity filer category	Large Accelerated Filer
Entity registrant name	Quaker Chemical Corporation
Entity voluntary filers	No
Entity well known seasoned issuer	Yes
Entity common stock shares outstanding	13,334,364
Trading Symbol	KWR

Condensed Consolidated Statement of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net Sales	$ 222,022	$ 212,918	$ 656,039	$ 609,010
Cost of goods sold	140,929	138,142	418,562	391,512
Gross profit	81,093	74,776	237,477	217,498
Selling, general and administrative expenses	53,270	51,092	157,360	148,740
Combination-related expenses	2,904	9,675	12,404	23,088
Operating income	24,919	14,009	67,713	45,670
Other (expense) income, net	(523)	249	(631)	(1,427)
Interest Expense	(1,510)	(793)	(4,804)	(2,229)
Interest Income	521	762	1,581	1,825
Income before taxes and equity in net income of associated companies	23,407	14,227	63,859	43,839
Taxes on income before equity in net income of associated companies	4,330	3,140	13,554	14,229
Income before equity in net income of associated companies	19,077	11,087	50,305	29,610
Equity in net income of associated companies	694	617	1,623	2,049
Net Income	19,771	11,704	51,928	31,659
Less: Net income attributable to noncontrolling interest	81	562	260	1,619
Net Income Attributable to Quaker Chemical Corporation	$ 19,690	$ 11,142	$ 51,668	$ 30,040
Per share data:
Basic Earnings Per Common Share	$ 1.48	$ 0.84	$ 3.88	$ 2.26
Diluted Earnings per Common Share	1.47	0.83	3.87	2.25
Dividends Declared	$ 0.37	$ 0.355	$ 1.095	$ 1.055

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 19,771	$ 11,704	$ 51,928	$ 31,659
Currency Translation Adjustments	(6,859)	5,764	(17,111)	18,528
Defined Benefit Retirement Plans	678	62	2,258	2,171
Unrealized (loss) gain on Available-for-Sale Securities	162	286	(493)	453
Other Comprehensive income (loss)	(6,019)	6,112	(15,346)	21,152
Comprehensive Income	13,752	17,816	36,582	52,811
Less: Comprehensive Income Attributable to Noncontrolling Interest	(43)	(409)	(146)	(2,037)
Comprehensive Income Attributable to Quaker Chemical Corporation	$ 13,709	$ 17,407	$ 36,436	$ 50,774

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Condensed Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 99,810	$ 89,879
Accounts receivable, net	214,056	208,358
Inventories
Raw materials and supplies	49,913	44,439
Work-in-process and finished goods	46,692	42,782
Prepaid expenses and other current assets	17,446	21,128
Total current assets	427,917	406,586
Property, plant and equipment, at cost	254,881	255,990
Less accumulated depreciation	(172,724)	(169,286)
Net property, plant and equipment	82,157	86,704
Goodwill	83,695	86,034
Other intangible assets, net	65,912	71,603
Investments in associated companies	22,471	25,690
Non-current deferred tax assets	15,072	15,661
Other assets	32,065	30,049
Total assets	729,289	722,327
Current liabilities
Short-term borrowings and current portion of long-term debt	5,673	5,736
Accounts and other payables	96,053	97,732
Accrued compensation	24,099	22,846
Other current liabilities	31,485	29,384
Total current liabilities	157,310	155,698
Long-term debt	46,875	61,068
Non-current deferred tax liabilities	9,543	9,653
Other non-current liabilities	82,925	87,044
Total liabilities	296,653	313,463
Equity
Common stock $1 par value; authorized 30,000,000 shares; issued and outstanding 2018 - 13,334,364 shares; 2017 - 13,307,976 shares	13,334	13,308
Capital in excess of par value	96,121	93,528
Retained earnings	402,255	365,182
Accumulated Other Comprehensive Loss	(80,332)	(65,100)
Total Quaker shareholders' equity	431,378	406,918
Noncontrolling interest	1,258	1,946
Total equity	432,636	408,864
Total liabilities and equity	$ 729,289	$ 722,327

Condensed Consolidated Balance Sheet (Parentheticals) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Common Stock Par Value	$ 1	$ 1
Common Stock, Shares Authorized	30,000,000	30,000,000
Common Stock, Shares, Issued	13,334,364	13,307,976

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net Income	$ 51,928	$ 31,659
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	9,386	9,464
Amortization	5,525	5,490
Equity in undistributed earnings of associated companies, net of dividends	2,658	(1,919)
Deferred compensation and other, net	(898)	(1,190)
Share-based compensation	2,847	3,269
(Gain) loss on disposal of property, plant and equipment and other assets	(680)	(50)
Insurance settlement realized	(680)	(542)
Combination-related expenses, net of payments	(349)	10,367
Pension And Other postretirement benefit expense		608
Pension and other postretirement benefits contributions	(1,113)
Increase (decrease) in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	(14,029)	(12,946)
Inventories	(12,719)	(9,272)
Prepaid expenses and other current assets	2,196	(5,217)
Accounts payable and accrued liabilities	6,824	11,755
Change in restructuring liabilities	0	(675)
Net cash provided by operating activities	50,896	40,801
Cash flows from investing activities
Investments in property, plant and equipment	(8,815)	(8,032)
Payments related to acquisitions, net of cash acquired	(500)	(5,363)
Proceeds from disposition of assets	803	67
Insurance settlement interest earned	102	35
Net cash used in investing activities	(8,410)	(13,293)
Cash flows from financing activities
Proceeds from long-term debt	0	4,472
Repayment of long-term debt	(11,518)	(488)
Dividends paid	(14,385)	(13,893)
Stock options exercised, other	(227)	(2,594)
Distributions to noncontrolling affiliate shareholders	(834)	0
Net cash used in financing activities	(26,964)	(12,503)
Effect of exchange rate changes on cash	(6,168)	4,758
Net (decrease) increase in cash and cash equivalents	9,354	19,763
Cash, Cash Equivalents and Restricted Cash at the beginning of the period	111,050	110,701
Cash, Cash Equivalents and Restricted Cash at the end of the period	$ 120,404	$ 130,464

Condensed Financial Information	9 Months Ended
Condensed Financial Information	Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 – Condensed Financial Information The condensed consolidated financial statements included herein are unaudited and have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) for interim financial reporting and the United States Securities and Exchange Commission (“SEC”) regulations. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the financial statements reflect all adjustments (consisting only of normal recurring adjustments, except certain material adjustments, as discussed below) which are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods. The results for the three and nine months ended September 30, 2018, respectively, are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the Company’s Annual Report filed on Form 10-K for the year ended December 31, 2017. During the first quarter of 2018, the Company adopted guidance regarding the accounting for and disclosure of net sales and revenue recognition. The Company’s adoption, using the modified retrospective adoption approach, resulted in certain adjustments to its Condensed Consolidated Balance Sheet as of December 31, 2017. In addition, during the first quarter of 2018, the Company adopted an accounting standard update requiring that the statement of cash flows explain both the change in total cash and cash equivalents and also the amounts generally described as restricted cash or restricted cash equivalents. The guidance in this accounting standard update was required to be applied retrospectively which resulted in certain adjustments to the Company’s Condensed Consolidated Statement of Cash Flows for the Nine months ended September 30, 2017. See Note 3 of Notes to Condensed Consolidated Financial Statements. Hyper-inflationary economies Economies that have a cumulative three-year rate of inflation exceeding 100 percent are considered hyper-inflationary under U.S. GAAP. A legal entity which 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 Condensed Consolidated Statements of Income. The Company has a 50-50 joint venture in a Venezuelan affiliate, Kelko Quaker Chemical, S.A. Venezuela’s economy has been considered hyper-inflationary under U.S. GAAP since 2010. As of June 30, 2018, the Company’s investment in Kelko Quaker Chemical S.A. was less than $0.1 million. Due to heightened foreign exchange controls and restrictions currently present within Venezuela, during the third quarter of 2018 the Company concluded that it no longer had significant influence over this affiliate. Based on various indices or index compilations currently being used to monitor inflation in Argentina as well as recent economic instability, effective July 1, 2018, Argentina’s economy was considered hyper-inflationary under U.S. GAAP. As a result, the Company began applying hyper-inflationary accounting with respect to the Company's wholly owned Argentina subsidiary beginning July 1, 2018. As of, and for the nine months ended September 30, 2018, the Company's Argentina subsidiary represented less than 1% of the Company’s consolidated total assets and less than 1% of the Company’s consolidated net sales. During the three and nine months ended September 30, 2018, the Company recorded $0.5 million and $0.8 million of remeasurement losses associated with the applicable currency conversions related to Venezuela and Argentina. During the three and nine months ended September 30, 2017, the Company recorded less than $0.1 million and $0.4 million of remeasurement losses related to Venezuela.

Houghton Combination	9 Months Ended
Houghton Combination	Sep. 30, 2018
Business Combination Separately Recognized Transaction [Abstract]
Business Combination Separately Recognized Transactions Table Text Block	Note 2 – Houghton Combination On April 4, 2017, Quaker entered into a share purchase agreement with Gulf Houghton Lubricants, Ltd. to purchase the entire issued and outstanding share capital of Houghton International, Inc. (“Houghton”) (herein referred to as “the Combination”). The shares will be bought for aggregate purchase consideration consisting of: (i) $172.5 million in cash; (ii) a number of shares of common stock, $1.00 par value per share, of the Company comprising 24.5% of the common stock outstanding upon the closing of the Combination; and (iii) the Company’s assumption of Houghton’s net indebtedness as of the closing of the Combination, which was approximately $690 million at signing. At closing, the total aggregate purchase consideration is dependent on the Company’s stock price and the level of Houghton’s indebtedness. The Company secured $1.15 billion in commitments from Bank of America Merrill Lynch and Deutsche Bank to fund the Combination and to provide additional liquidity, and has since replaced these commitments with a syndicated bank agreement (“the New Credit Facility”) with a group of lenders for $1.15 billion. The New Credit Facility is contingent upon and will not be effective until the closing of the Combination. During the third quarter of 2018 the Company extended the bank commitment for the New Credit Facility through December 15, 2018. The New Credit Facility is comprised of a $400.0 million multicurrency revolver, a $600.0 million USD term loan and a $150.0 million EUR equivalent term loan, each with a five-year term from the date the New Credit Facility becomes effective. The maximum amount available under the New Credit Facility can be increased by $200.0 million at the Company’s option if the lenders agree and the Company satisfies certain conditions. Borrowings under the New Credit Facility will bear interest at a base rate or LIBOR rate plus a margin. The Company currently estimates the annual floating rate cost will be in the 3.50% to 3.75% range based on current market interest rates. The New Credit Facility will be subject to certain financial and other covenants, including covenants that the Company’s consolidated net debt to adjusted EBITDA ratio cannot initially exceed 4.25 to 1 and the Company’s consolidated adjusted EBITDA to interest expense ratio cannot be less than 3.0 to 1. Both the USD and EUR equivalent term loans will have quarterly principal amortization during their respective five-year terms, with 5% amortization of the principal balance due in years 1 and 2, 7.5% in year 3, and 10% in years 4 and 5, with the remaining principal amounts due at maturity. Until closing, the Company will incur certain interest costs paid to maintain the bank commitment (“ticking fees”), which began to accrue on September 29, 2017 and bear an interest rate of 0.30% per annum. The Company received regulatory approval for the Combination from China and Australia in 2017. In addition, at a shareholder meeting held during the third quarter of 2017, the Company’s shareholders overwhelmingly approved the issuance of the new shares of the Company’s common stock at closing of the Combination. Currently, the closing of the Combination is contingent upon customary closing conditions and the remaining regulatory approvals in the United States and Europe. The Company has presented a remedy to the European Commission and the United States Federal Trade Commission and expects to receive approval from both regulatory authorities and close the Combination in December 2018 or January 2019. The Company incurred total costs of $3.8 million and $14.4 million during the three and nine months ended September 30, 2018, and $9.7 million and $23.1 million during the three and nine months ended September 30, 2017, respectively, related to the Combination. These costs included legal, environmental, financial, and other advisory and consultant costs related to due diligence, regulatory and shareholder approvals and integration planning associated with the Combination, as well as ticking fees. As of September 30, 2018 and December 31, 2017, the Company had current liabilities related to the Combination of approximately $5.1 million and $5.5 million, respectively, primarily recorded within other current liabilities on its Condensed Consolidated Balance Sheets.

Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Sep. 30, 2018
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Note 3 – Recently Issued Accounting Standards The Financial Accounting Standards Board (“FASB”) issued an accounting standard update in August 2018 that modifies certain disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this accounting standard update remove disclosures that are no longer considered cost beneficial, clarify the specific requirements of certain disclosures, and add new disclosure requirements as relevant. The guidance within this accounting standard update is effective for annual periods beginning after December 15, 2020, and should be applied retrospectively to all periods presented. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued an accounting standard update in August 2018 that clarifies the accounting for implementation costs incurred in a cloud computing arrangement under a service contract. This guidance generally aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement under a service contract with the requirements for capitalizing implementation costs related to internal-use software. The guidance within this accounting standard update is effective for annual periods beginning after December 15, 2019, and should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued an accounting standard update in August 2018 that modifies certain disclosure requirements for fair value measurements. The guidance removes certain disclosure requirements regarding transfers between levels of the fair value hierarchy as well as the valuation processes for certain fair value measurements. Further, the guidance added certain disclosure requirements including unrealized gains and losses and significant unobservable inputs used to develop certain fair value measurements. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2019, and should be applied prospectively in the initial year of adoption or prospectively to all periods presented, depending on the amended disclosure requirement. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued an accounting standard update in June 2018 to simplify the accounting for share-based payment transactions with non-employees of the Company. The guidance within this accounting standard update generally requires that share-based payment transactions for acquiring goods or services from non-employees of the Company be accounted for under the same guidance and model as all other share-based payment transactions, including employees of the Company. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2018. Early adoption is permitted. The Company elected to early adopt the guidance within this accounting standard updated in the second quarter of 2018 with no impact to its financial statements. The FASB issued an accounting standard update in February 2018 that allows a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act enacted in December 2017. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2018, and should be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued an accounting standard update in January 2017 to clarify the definition of a business with the objective of adding guidance to assist companies with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this accounting standard update provided a more robust framework to use in determining when a set of assets and activities is a business. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2017. Early adoption was permitted in limited circumstances, and the amendments in this accounting standard update were required to be applied prospectively, with no disclosures required at transition. The Company adopted the guidance in the first quarter of 2018, as required, with no impact to its financial statements. The FASB issued an accounting standard update in November 2016 requiring that the statement of cash flows explain both the change in the total cash and cash equivalents, and also the amounts generally described as restricted cash or restricted cash equivalents. This required amounts generally described as restricted cash or restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning and ending amounts shown on the statement of cash flows. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2017. Early adoption was permitted and the guidance required application using a retrospective transition method to each period presented when adopted. The Company adopted the guidance in the first quarter of 2018, as required. Adoption of the guidance did not have an impact on the Company’s earnings or balance sheet but did result in changes to certain disclosures within the statement of cash flows, including cash flows from investing activities and total cash, cash equivalents and restricted cash. See Note 12 of Notes to Condensed Consolidated Financial Statements. The FASB issued an accounting standard update in October 2016 to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The provisions in this update allowed an entity to recognize current and deferred income taxes of an intra-entity transfer of an asset other than inventory when the transfer occurs rather than when the asset has been sold to an outside party. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2017. Early adoption was permitted and the guidance required application on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company adopted the guidance in the first quarter of 2018, as required, with no impact to its financial statements. The FASB issued an accounting standard update in August 2016 to standardize how certain transactions are classified in the statement of cash flows. Specific transactions covered by the accounting standard update include debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate and bank owned life insurance policies, distributions received from equity method investments and beneficial interest in securitization transactions. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2017. Early adoption was permitted, provided that all of the amendments were adopted in the same period. The guidance required application using a retrospective transition method. The Company adopted the guidance in the first quarter of 2018 as required, with no impact to its financial statements. The FASB issued an accounting standard update in February 2016 regarding the accounting and disclosure for leases. During 2018, the FASB issued a series of accounting standard updates to clarify and expand on the original 2016 implementation guidance, including certain targeted improvements around comparative reporting requirements and accounting for lease and non-lease components by lessors as well as other technical corrections and improvements. The amendments in these 2018 updates did not change the core principles of the guidance previously issued in February 2016. The guidance within all of the leasing accounting standard updates are effective for annual and interim periods beginning after December 15, 2018, and should be applied on a modified retrospective basis, applying the transition requirements either (a) at the beginning of the earliest period presented in the financial statements in the year of adoption (i.e. January 1, 2017) or (b) in the period of adoption (i.e. January 1, 2019). Early adoption is permitted, but the Company has not early adopted. The Company expects to adopt the guidance in the first quarter of 2019, as required, using a modified retrospective transition approach The Company currently anticipates electing to apply the transition requirements in the period of adoption (i.e. as of January 1, 2019), as permitted. As such the Company will neither restate comparative periods for the effects of this lease accounting guidance or provide the disclosures requirements for comparative periods. While the Company’s decisions are not finalized, the Company anticipates electing to apply certain of the permitted practical expedients within the new lease accounting guidance, and, also, the Company anticipates making certain accounting policy elections as a result of adopting the new lease accounting guidance. As of September 30, 2018, the Company has substantially completed its implementation planning and has made significant progress towards completing its impact assessment. Work performed to date includes developing a detailed project plan, identifying and establishing a cross-functional implementation team and developing pre-adoption internal controls. In addition, the Company has gathered an inventory of the Company’s explicit outstanding leases globally, performed certain review procedures to ensure completeness of its lease population and began abstracting critical lease information from the lease population for inclusion within the Company’s leasing software. Also, the Company has begun preliminary considerations for how the new lease accounting guidance may impact Houghton, as it pertains to the potential Combination. The Company anticipates using the remainder of 2018 to further develop its considerations for the potential Houghton Combination as well as finalize its impact assessment and implementation including completing the abstraction of critical lease information for inclusion within the Company’s leasing software and calculating a preliminary transition adjustment that will be reflected in the Company’s financial statements starting after the effective date of January 1, 2019. While the Company’s implementation of this lease accounting guidance is still on-going, the Company anticipates adoption of this guidance will have a material impact on its balance sheet as it expects the majority of its leases will be recorded on its balance sheet by establishing right of use assets and associated lease liabilities. The Company previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017 that its undiscounted contractual obligations associated with operating leases were $27.6 million in the aggregate, which will be one of the significant inputs used in calculating the amount of right of use assets and associated lease liabilities the Company will record on its Condensed Consolidated Balance Sheet as of January 1, 2019 upon adoption of this lease accounting guidance. The FASB issued an accounting standard update in May 2014 regarding the accounting for and disclosure of revenue recognition. Specifically, the update outlined a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers, which will be common to both U.S. GAAP and International Financial Reporting Standards. The guidance was effective for annual and interim periods beginning after December 15, 2016, and allowed for full retrospective adoption of prior period data or a modified retrospective adoption. Early adoption was not permitted. In August 2015, the FASB issued an accounting standard update to delay the effective date of the new revenue standard by one year, or, in other words, to be effective for annual and interim periods beginning after December 15, 2017. Entities were permitted to adopt the new revenue standard early but not before the original effective date. During 2016 and 2017, the FASB issued a series of accounting standard updates to clarify and expand on the implementation guidance, including principal versus agent considerations, identification of performance obligations, licensing, other technical corrections and adding certain practical expedients. The amendments in these 2016 and 2017 updates did not change the core principles of the guidance previously issued in May 2014. As part of the Company’s impact assessment for the implementation of the new revenue recognition guidance, the Company reviewed its historical accounting policies and practices to identify potential differences with the requirements of the new revenue recognition standard as it related to the Company’s contracts and sales arrangements. In addition, the impact assessment and work performed included global and cross functional interviews and questionnaires, sales agreement and other sales document reviews, as well as technical considerations for the Company’s future transactional accounting, financial reporting and disclosure requirements. The Company has also progressed its assessment of how the new revenue recognition guidance may impact Houghton, as it pertains to the pending Combination. The Company adopted the guidance in the first quarter of 2018 as required, electing to use a modified retrospective adoption approach applied to those contracts which were not completed as of January 1, 2018. Comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. In addition, the Company elected to apply certain of the permitted practical expedients within the revenue recognition guidance and make certain accounting policy elections including those related to significant financing components, sales taxes and shipping and handling activities. Adoption of the revenue recognition guidance did not have a material impact on the Company’s reported earnings or cash flows, however, adoption did increase the amount and level of disclosures concerning the Company’s net sales and did result in one adjustment to the Company’s balance sheet. As a result of the Company’s impact assessment and adoption using the modified retrospective adoption approach, the Company recorded an adjustment to its Condensed Consolidated Balance Sheet as of December 31, 2017 to adjust the Company’s estimate of variable consideration relating to customers’ expected rights to return product. This adjustment resulted in an increase to other current liabilities of $1.0 million, an increase to non-current deferred tax assets of $0.2 million and a decrease to retained earnings of $0.8 million. There were no other impacts recorded as a result of adopting the revenue recognition guidance. The impact of adoption of the new revenue recognition guidance was immaterial for the three and nine months ended September 30, 2018 and the Company expects the impact to be immaterial on an ongoing basis. See Note 4 of Notes to Condensed Consolidated Financial Statements.

Net Sales and Revenue Recognition

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Revenue From Contract With Customer [Text Block]

Note 4 – Net Sales and Revenue Recognition

Business Description

The Company develops, produces, and markets a broad range of formulated chemical specialty products and offers chemical management services (“CMS”) for various heavy industrial and manufacturing applications in a global portfolio throughout its four regions: North America, Europe, Middle East and Africa (“EMEA”), Asia/Pacific and South America. The major product lines in the Company’s global portfolio include: (i) rolling lubricants (used by manufacturers of steel in the hot and cold rolling of steel and by manufacturers of aluminum in the hot rolling of aluminum); (ii) machining and grinding compounds (used by metalworking customers in cutting, shaping, and grinding metal parts which require special treatment to enable them to tolerate the manufacturing process, achieve closer tolerance, and improve tool life); (iii) corrosion preventives (used by steel and metalworking customers to protect metal during manufacture, storage, and shipment); (iv) hydraulic fluids (used by steel, metalworking, and other customers to operate hydraulic equipment); (v) specialty greases (used in automotive and aerospace production processes and applications, the manufacturing of steel, and various other applications); and (vi) metal finishing compounds (used to prepare metal surfaces for special treatments such as galvanizing and tin plating and to prepare metal for further processing).

A substantial portion of the Company’s sales worldwide are made directly through its own employees and its CMS programs, with the balance being handled through distributors and agents. The Company’s employees visit the plants of customers regularly, work on site, and, through training and experience, identify production needs which can be resolved or alleviated either by adapting the Company’s existing products or by applying new formulations developed in its laboratories. The chemical specialty industry comprises many companies of similar size as well as companies larger and smaller than Quaker. The offerings of many of the Company’s competitors differ from those of Quaker; some offer a broad portfolio of fluids, including general lubricants, while others have a more specialized product range. All competitors provide different levels of technical services to individual customers. Competition in the industry is based primarily on the ability to provide products that meet the needs of the customer, render technical services and laboratory assistance to the customer and, to a lesser extent, on price.

As part of the Company’s CMS, certain third-party product sales to customers are managed by the Company. Where the Company acts as a principal, revenues are recognized on a gross reporting basis at the selling price negotiated with its customers. Where the Company acts as an agent, revenue is recognized on a net reporting basis at the amount of the administrative fee earned by the Company for ordering the goods. In determining whether the Company is acting as a principal or an agent in each arrangement, the Company considers whether it is primarily responsible for fulfilling the promise to provide the specified good, has inventory risk before the specified good has been transferred to the customer and has discretion in establishing the prices for the specified goods. Third-party products transferred under arrangements resulting in net reporting totaled $11.7 million and $35.8 million for the three and nine months ended September 30, 2018, respectively, and $11.2 million and $33.0 million for the three and nine months ended September 30, 2017, respectively.

A significant portion of the Company’s revenues are realized from the sale of process fluids and services to manufacturers of steel, automobiles, aircraft, appliances, and durable goods, and, therefore, the Company is subject to the same business cycles as those experienced by these manufacturers and their customers. The Company’s financial performance is generally correlated to the volume of global production within the industries it serves, rather than discretely related to financial performance of such industries. Furthermore, steel customers typically have limited manufacturing locations compared to other metalworking customers and generally use higher volumes of products at a single location. As previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017, during 2017 the Company’s five largest customers (each composed of multiple subsidiaries or divisions with semiautonomous purchasing authority) accounted for approximately 18% of consolidated net sales, with its largest customer accounting for approximately 8% of consolidated net sales.

Revenue Recognition Model

The Company applies the FASB’s guidance on revenue recognition which requires the Company to recognize 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 the five-step model in the FASB’s guidance, 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 a 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. In most instances, the Company’s contract with a customer is the customer’s purchase order. For certain customers, the Company may also enter into a sales agreement which outlines a framework of terms and conditions which apply to all future and subsequent purchase orders for that customer. In these situations, the Company’s contract with the customer is both the sales agreement as well as the specific customer purchase order. Because the Company’s contract with a customer is typically for a single transaction or customer purchase order, the duration of the contract is almost always one year or less. As a result, the Company has elected to apply certain practical expedients and omit certain disclosures of remaining performance obligations for contracts which have an initial term of one year or less as permitted by the FASB.

The Company identifies a performance obligation in a contract for each promised good or service that is separately identifiable from other promises 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 FASB’s guidance, the Company recognizes revenue when, or as, it satisfies the performance obligation in a contract by transferring control of a promised good or service to the customer. The Company recognizes revenue over time whenever the customer simultaneously receives and consumes the benefits provided by the Company’s performance; the Company’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced; or the Company’s performance does not create an asset with an alternative use to the entity, and the entity has an enforceable right to payment, including a profit margin, for performance completed to date. For performance obligations not satisfied over time, the Company determines the point in time at which a customer obtains control of a promised asset and the Company satisfies a performance obligation by considering when the Company has a right to payment for the asset; the customer has legal title to the asset; the Company has transferred physical possession of the asset; the customer has the significant risks and rewards of ownership of the asset; or the customer has accepted the asset.

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 CMS 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 CMS or other service work performed by the Company.

Other Considerations

The Company does not have standard payment terms for all customers globally, however the Company’s general payment terms require customers to pay for products or services provided after the performance obligation is satisfied. The Company does not have significant financing arrangements with its customers. The Company does not have significant amounts of variable consideration in its contracts with customers and where applicable, the Company’s estimates of variable consideration are not constrained. The Company records certain third-party license fees in other income (expense), net, in its Condensed Consolidated Statement of Income, 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.

Practical Expedients and Accounting Policy Elections

The Company made certain accounting policy elections and elected to use certain practical expedients as permitted by the FASB in applying the guidance on revenue recognition. It is the Company’s policy to not adjust the promised amount of consideration for the effects of a significant financing component as the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to the customer and when the customer pays for that good or service will be one year or less. In addition, it is the Company’s policy to expense costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less. It is also the Company’s accounting policy to exclude 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 activities that occur after the customer has obtained control of a good as a fulfilment cost rather than an additional promised service.

Contract Assets and Liabilities

The Company recognizes a contract asset or receivable on its Condensed 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. The Company had no contract assets recorded on its Condensed Consolidated Balance Sheets as of September 30, 2018 or December 31, 2017.

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. The Company’s contract liabilities primarily represent deferred revenue recorded for customer payments received by the Company prior to the Company satisfying the associated performance obligation. Deferred revenues are presented within other current liabilities in the Company’s Condensed Consolidated Balance Sheets. The Company had approximately $1.6 million and $1.5 million of deferred revenue as of September 30, 2018 and December 31, 2017, respectively. During the three and nine months ended September 30, 2018 the Company satisfied the associated performance obligations and recognized revenue of $1.6 million and $4.4 million, respectively, related to advance customer payments previously received.

Disaggregated Revenue

The Company sells its various industrial process fluids, its chemical specialties and its technical expertise as a global product portfolio. The Company generally manages and evaluates its performance by geography first, and then by customer industry, rather than by individual product lines. The Company has provided annual net sales information for its product lines greater than 10% in its previously filed Form 10-K for the year ended December 31, 2017, and those annual percentages are generally consistent with the current year’s net sales by product line. Also, net sales of each of the Company’s major product lines are generally spread throughout all four of the Company’s regions, and in most cases are relatively proportionate to the level of total sales in each region.

The following disaggregates the Company’s net sales by region, customer industry, and timing of revenue recognized for the three and nine months ended September 30, 2018:

	Three Months Ended September 30, 2018
	North						South		Consolidated
	America		EMEA		Asia/Pacific		America		Total
Net sales	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

Customer Industries
Primary metals	$	40,448	$	24,188	$	35,108	$	4,781	$	104,525
Metalworking		45,189		27,986		19,585		3,768		96,528
Coatings and other		16,069		3,324		1,064		512		20,969
	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

Timing of Revenue Recognized
Product sales at a point in time	$	98,965	$	55,437	$	53,998	$	8,992	$	217,392
Services transferred over time		2,741		61		1,759		69		4,630
	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

	Nine Months Ended September 30, 2018
	North						South		Consolidated
	America		EMEA		Asia/Pacific		America		Total
Net sales	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Customer Industries
Primary metals	$	117,174	$	77,692	$	101,026	$	15,115	$	311,007
Metalworking		128,709		88,909		56,486		11,416		285,520
Coatings and other		45,035		11,118		2,370		989		59,512
	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Timing of Revenue Recognized
Product sales at a point in time	$	282,513	$	177,546	$	153,863	$	27,298	$	641,220
Services transferred over time		8,405		173		6,019		222		14,819
	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Business Segments

9 Months Ended

Sep. 30, 2018

Segment Reporting Measurement Disclosures [Abstract]

Segment Reporting Disclosure [Text Block]

Note 5 – Business Segments

The Company’s reportable operating segments are organized by geography as follows: (i) North America, (ii) EMEA, (iii) Asia/Pacific and (iv) South America. Operating earnings, excluding indirect operating expenses, for the Company’s reportable operating segments is comprised of revenues less cost of goods sold (“COGS”) and selling, general and administrative expenses (“SG&A”) directly related to the respective region’s product sales. The indirect operating expenses consist of SG&A not directly attributable to the product sales of each respective reportable operating segment. Other items not specifically identified with the Company’s reportable operating segments include interest expense, interest income, license fees from non-consolidated affiliates, amortization expense and other (expense) income, net.

The following table presents information about the performance of the Company’s reportable operating segments for the three and nine months ended September 30, 2018 and 2017:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2018		2017		2018		2017
Net sales
	North America	$	101,706	$	90,450	$	290,918	$	268,122
	EMEA		55,498		58,775		177,719		167,209
	Asia/Pacific		55,757		54,200		159,882		147,074
	South America		9,061		9,493		27,520		26,605
Total net sales		$	222,022	$	212,918	$	656,039	$	609,010

Operating earnings, excluding indirect operating expenses
	North America	$	24,558	$	18,888	$	68,160	$	59,146
	EMEA		8,577		8,862		27,966		26,325
	Asia/Pacific		14,761		13,963		41,524		36,018
	South America		1,214		965		2,963		2,826
Total operating earnings, excluding indirect operating expenses			49,110		42,678		140,613		124,315
Combination-related expenses			(2,904)		(9,675)		(12,404)		(23,088)
Indirect operating expenses			(19,460)		(17,108)		(54,971)		(50,067)
Amortization expense			(1,827)		(1,886)		(5,525)		(5,490)
Consolidated operating income			24,919		14,009		67,713		45,670
Other (expense) income, net			(523)		249		(631)		(1,427)
Interest expense			(1,510)		(793)		(4,804)		(2,229)
Interest income			521		762		1,581		1,825
Consolidated income before taxes and equity in net income of
	associated companies	$	23,407	$	14,227	$	63,859	$	43,839

Inter-segment revenues for the three and nine months ended September 30, 2018 were $2.5 million and $7.4 million for North America, $5.9 million and $16.9 million for EMEA, less than $0.1 million and $0.5 million for Asia/Pacific, respectively, and less than $0.1 million for South America in both periods. Inter-segment revenues for the three and nine months ended September 30, 2017 were $2.8 million and $7.4 million for North America, $6.2 million and $16.0 million for EMEA, $0.2 million and $0.3 million for Asia/Pacific, respectively, and less than $0.1 million for South America in both periods. However, all inter-segment transactions have been eliminated from each reportable operating segment’s net sales and earnings for all periods presented above.

Restructuring and Related Activities

9 Months Ended

Sep. 30, 2018

Restructuring And Related Activities [Abstract]

Restructuring And Related Activities Disclosure [TextBlock]

Note 6 – Restructuring and Related Activities

As previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017, in the fourth quarter of 2015 Quaker’s management approved a global restructuring plan (the “2015 Program”) to reduce its operating costs. The 2015 Program included provisions for the reduction of total headcount of approximately 65 employees globally. The Company completed all of the remaining initiatives under the 2015 Program during the first half of 2017 and does not expect to incur further restructuring charges under this program. Restructuring activity recognized by reportable operating segment in connection with the 2015 Program during the nine months ended September 30, 2017 is as follows:

		North
		America		EMEA		Total
Accrued restructuring as of December 31, 2016		$	196	$	474	$	670
	Restructuring charges and adjustments		(126)		126		—
	Cash payments		(70)		(605)		(675)
	Currency translation adjustments		—		5		5
Accrued restructuring as of September 30, 2017		$	—	$	—	$	—

There were no accrued restructuring liabilities as of December 31, 2017 and no associated cash payments or other restructuring activity during the nine months ended September 30, 2018.

Share-Based Compensation

9 Months Ended

Sep. 30, 2018

Share Based Compensation [Abstract]

Disclosure Of Compensation Related Costs Share Based Payments [Text Block]

Note 7 – Share-Based Compensation

The Company recognized the following share-based compensation expense in SG&A in its Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Stock options	$	267	$	243	$	785	$	714
Nonvested stock awards and restricted stock units		550		717		1,901		2,314
Employee stock purchase plan		24		22		68		66
Non-elective and elective 401(k) matching contribution in stock		—		8		—		72
Director stock ownership plan		31		34		93		103
Total share-based compensation expense	$	872	$	1,024	$	2,847	$	3,269

During the first quarter of 2018, the Company granted stock options under its long-term incentive plan (“LTIP”) that are subject only to time vesting over a three-year period. For the purposes of determining the fair value of stock option awards, the Company used the Black-Scholes option pricing model and the assumptions set forth in the table below:

Number of options granted	35,842
Dividend yield	1.37	%
Expected volatility	24.73	%
Risk-free interest rate	2.54	%
Expected term (years)	4.0

The fair value of these options is amortized on a straight-line basis over the vesting period. As of September 30, 2018, unrecognized compensation expense related to options granted was $1.5 million, to be recognized over a weighted average remaining period of 1.9 years. There were no stock options granted in the second or third quarters of 2018.

During the first nine months of 2018, the Company granted 16,166 nonvested restricted shares and 1,480 nonvested restricted stock units under its LTIP plan that are subject only to time vesting, generally over a three-year period. The fair value of these awards is based on the trading price of the Company’s common stock on the date of grant. The Company adjusts the grant date fair value of these awards for expected forfeitures based on historical experience. As of September 30, 2018, unrecognized compensation expense related to the nonvested shares was $2.7 million, to be recognized over a weighted average remaining period of 1.8 years, and unrecognized compensation expense related to nonvested restricted stock units was $0.2 million, to be recognized over a weighted average remaining period of 2.0 years.

Pension and Postretirement Benefits

9 Months Ended

Sep. 30, 2018

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Pension And Other Postretirement Benefits Disclosure [Text Block]

Note 8 – Pension and Other Postretirement Benefits

The components of net periodic benefit cost for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
					Other								Other
					Postretirement								Postretirement
	Pension Benefits				Benefits				Pension Benefits				Benefits
		2018		2017		2018		2017		2018		2017		2018		2017
Service cost	$	938	$	921	$	—	$	2	$	2,886	$	2,710	$	5	$	6
Interest cost		1,015		994		31		36		3,096		3,005		97		108
Expected return on plan assets		(1,229)		(1,276)		—		—		(3,793)		(3,857)		—		—
Settlement charge		—		—		—		—		—		1,860		—		—
Actuarial loss amortization		782		798		2		13		2,375		2,459		31		40
Prior service cost amortization		(28)		(28)		—		—		(88)		(76)		—		—
Net periodic benefit cost	$	1,478	$	1,409	$	33	$	51	$	4,476	$	6,101	$	133	$	154

During the second quarter of 2017, one of the Company’s U.S. pension plans offered a cash settlement to its vested terminated participants which allowed them to receive the value of their pension benefits as a single lump sum payment. As payments from the U.S. pension plan for this cash-out offering exceeded the service and interest cost components of the U.S. pension plan expense for 2017, the Company recorded a settlement charge of approximately $1.9 million. This 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 by these payments. The gross pension benefit obligation was reduced by approximately $4.0 million as a result of these payments. The settlement charge was recognized through other expense, net, on the Company’s Condensed Consolidated Statement of Income. See Note 9, below, specifically the line “Pension and postretirement benefit costs, non-service components.”

Employer Contributions

During the nine months ended September 30, 2018, $5.1 million and $0.2 million of contributions have been made to the Company’s pension plans and its postretirement benefit plans, respectively. The Company currently estimates that it will make cash contributions to its pension plans of approximately $6 million in 2018.

Other Income (Expense)

9 Months Ended

Sep. 30, 2018

Other Income And Expenses [Abstract]

Other Income And Other Expense Disclosure [Text Block]

Note 9 – Other (Expense) Income, Net

The components of other (expense) income, net, for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Income from third party license fees	$	144	$	141	$	583	$	612
Foreign exchange (losses) gains, net		(285)		545		(1,007)		580
Gain on fixed asset disposals, net		81		22		680		50
Non-income tax refunds and other related credits		127		130		668		748
Pension and postretirement benefit costs, non-service components		(568)		(537)		(1,713)		(3,539)
Other non-operating income		115		47		374		288
Other non-operating expense		(137)		(99)		(216)		(166)
Total other (expense) income, net	$	(523)	$	249	$	(631)	$	(1,427)

Gain on fixed asset disposals, net, during the nine months ended September 30, 2018 includes a $0.6 million gain on the sale of a held-for-sale asset. In addition, foreign exchange (losses) gains, net, during the three and nine months ended September 30, 2018 include both a foreign currency transaction loss of approximately $0.5 million related to hyper-inflationary accounting for the Company’s Argentina subsidiary effective July 1, 2018 and a foreign currency transaction gain of approximately $0.4 million related to the liquidation of an inactive legal entity.

Income Taxes and Uncertain Tax Positions	9 Months Ended
Income Taxes and Uncertain Tax Positions	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Note 10 – Income Taxes and Uncertain Income Tax Positions The Company’s effective tax rate for the three and nine months ended September 30, 2018 were 18.5% and 21.2%, respectively, compared to 22.1% and 32.5%, respectively, for the three and nine months ended September 30, 2017. The Company’s effective tax rates for each of the periods presented include the impact of certain non-deductible costs related to the pending Combination. The Company’s effective tax rate for the three and nine months ended September 30, 2018 also includes tax adjustments of $1.1 million and $2.3 million, respectively, as a result of changes to certain of the Company’s initial fourth quarter of 2017 estimates associated with the December 2017 Tax Cuts and Jobs Act (“U.S. Tax Reform”), described below. In addition to these items, the Company’s current year effective tax rate benefited from the decrease in the U.S. statutory tax rate from 35% in the prior year to 21% in the current year as a result of U.S. Tax Reform. The Company’s tax adjustments associated with U.S. Tax Reform during the three and nine months ended September 30, 2018, included adjustments to decrease its initial estimate of the one-time deemed repatriation of undistributed earnings on previously untaxed accumulated and current earnings and profits of certain of the Company’s foreign subsidiaries (“Transition Tax”), specifically related to proposed regulations published by the Internal Revenue Service (“IRS”), the U.S Treasury and various state taxing authorities, as well as an increase to its initial estimate of the impact from internal revenue code changes associated with the deductibility of certain executive compensation. To date, the Company has not made any other significant changes to its initial assessments made during the fourth quarter of 2017. As previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as U.S. Tax Reform on December 22, 2017. U.S. Tax Reform includes multiple changes to the U.S. tax code with varying effects on the Company’s results for the three and nine months ended September 30, 2018. The SEC staff issued guidance on accounting for the tax effects of U.S. Tax Reform and provided a one-year measurement period for companies to complete the accounting. Companies are required to reflect the income tax effects of those aspects of U.S. Tax Reform for which the accounting is complete. To the extent that a company’s accounting for certain income tax effects of U.S. Tax Reform are incomplete but the company is able to determine a reasonable estimate, it must record a provisional estimate in its financial statements. The Company has made reasonable interpretations and assumptions with regard to various uncertainties and ambiguities in the application of certain provisions of U.S. Tax Reform. The Company is continuing to evaluate all of the provisions of U.S. Tax Reform and expects to finalize its assessment during the one-year measurement period provided by the SEC to complete the accounting for U.S. Tax Reform. It is possible that the IRS or the U.S. Department of the Treasury could issue subsequent guidance or take positions on audit that differ from the Company’s interpretations and assumptions. As of September 30, 2018, the Company’s cumulative liability for gross unrecognized tax benefits was $7.0 million. As of December 31, 2017, the Company’s cumulative liability for gross unrecognized tax benefits was $6.8 million. The Company continues to recognize interest and penalties associated with uncertain tax positions as a component of taxes on income before equity in net income of associated companies in its Condensed Consolidated Statements of Income. The Company recognized an expense for interest of less than $0.1 million and $0.1 million and a credit for penalties of $0.2 million and an expense for penalties of $0.1 million for the three and nine months ended September 30, 2018. Comparatively, the Company recognized a credit of less than $0.1 million and $0.1 million for interest, and an expense of $0.1 million and $0.2 million for penalties in its Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2017, respectively. As of September 30, 2018, the Company had accrued $0.7 million for cumulative interest and $1.1 million for cumulative penalties in its Condensed Consolidated Balance Sheets, compared to $0.6 million for cumulative interest and $1.0 million for cumulative penalties accrued at December 31, 2017. During the nine months ended September 30, 2018 and 2017, the Company recognized a decrease of $0.7 million and $0.8 million, respectively, in its cumulative liability for gross unrecognized tax benefits due to the expiration of the applicable statutes of limitations for certain tax years. The Company estimates that during the year ending December 31, 2018 it will reduce its cumulative liability for gross unrecognized tax benefits by approximately $1.0 to $1.1 million due to the expiration of the statute of limitations with regard to certain tax positions. This estimated reduction in the cumulative liability for unrecognized tax benefits does not consider any increase in liability for unrecognized tax benefits with regard to existing tax positions or any increase in cumulative liability for unrecognized tax benefits with regard to new tax positions for the year ending December 31, 2018. 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 include Brazil from 2000; Italy from 2007; the Netherlands and the United Kingdom from 2012; China and Mexico from 2013; India from its fiscal year beginning April 1, 2014 and ending March 31, 2015; Spain from 2014; the United States from 2015, and various domestic state tax jurisdictions from 2008. As previously reported, the Italian tax authorities have assessed additional tax due from the Company’s subsidiary, Quaker Italia S.r.l., relating to the tax years 2007 through 2013. During the second quarter of 2018, the Italian tax authorities assessed additional tax due from Quaker Italia, S.r.l., relating to the tax years 2014 and 2015. The Company plans to meet with the Italian tax authorities by the end of 2018 to discuss these assessments. If these discussions are not successful in materially reducing the assessed tax, then the Company will further evaluate its options including potentially filing for competent authority relief from these assessments under the Mutual Agreement Procedures of the Organization for Economic Co-Operation and Development, consistent with the Company’s previous filings for 2008 through 2013. As of September 30, 2018, the Company believes it has adequate reserves for uncertain tax positions with respect to these and all other audits.

Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 11 – Earnings Per Share

The following table summarizes earnings per share calculations for the three and nine months ended September 30, 2018 and 2017:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2018		2017		2018		2017
Basic earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	19,690	$	11,142	$	51,668	$	30,040
	Less: income allocated to participating securities		(77)		(76)		(226)		(222)
	Net income available to common shareholders	$	19,613	$	11,066	$	51,442	$	29,818
	Basic weighted average common shares outstanding		13,278,259		13,217,165		13,263,417		13,196,255
Basic earnings per common share		$	1.48	$	0.84	$	3.88	$	2.26

Diluted earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	19,690	$	11,142	$	51,668	$	30,040
	Less: income allocated to participating securities		(77)		(76)		(226)		(222)
	Net income available to common shareholders	$	19,613	$	11,066	$	51,442	$	29,818
	Basic weighted average common shares outstanding		13,278,259		13,217,165		13,263,417		13,196,255
	Effect of dilutive securities		37,282		34,528		33,928		41,818
	Diluted weighted average common shares outstanding		13,315,541		13,251,693		13,297,345		13,238,073
Diluted earnings per common share		$	1.47	$	0.83	$	3.87	$	2.25

Certain stock options and restricted stock units are not included in the diluted earnings per share calculation since the effect would have been anti-dilutive. The calculated amount of anti-diluted shares not included were 718 and 3,480 for the three and nine months ended September 30, 2018, respectively, and 4,300 and 4,819 for the three and nine months ended September 30, 2017, respectively.

Restricted Cash

9 Months Ended

Sep. 30, 2018

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]

Cash And Cash Equivalents Disclosure [Text Block]

Note 12 – Restricted Cash

The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation. Due to the restricted nature of the proceeds, a corresponding deferred credit was established in other non-current liabilities for an equal and offsetting amount, and will remain until the restrictions lapse or the funds are exhausted via payments of claims and costs of defense.

The following table provides a reconciliation of cash, cash equivalents and restricted cash as of September 30, 2018 and 2017 and December 31, 2017 and 2016:

	September 30,				December 31,
	2018		2017		2017		2016
Cash and cash equivalents	$	99,810	$	109,088	$	89,879	$	88,818
Restricted cash included in other assets		20,594		21,376		21,171		21,883
Cash, cash equivalents and restricted cash	$	120,404	$	130,464	$	111,050	$	110,701

Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill And Intangible Assets Disclosure [Text Block]

Note 13 – Goodwill and Other Intangible Assets

The Company completes its annual impairment test 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. The Company continually evaluates financial performance, economic conditions and other relevant developments in assessing if an interim period impairment test for one or more of its reporting units is necessary. The Company has recorded no impairment charges in its past.

Changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows:

		North						South
		America		EMEA		Asia/Pacific		America		Total
Balance as of December 31, 2017		$	47,571	$	20,504	$	15,456	$	2,503	$	86,034
	Currency translation adjustments		(27)		(930)		(894)		(488)		(2,339)
Balance as of September 30, 2018		$	47,544	$	19,574	$	14,562	$	2,015	$	83,695

Gross carrying amounts and accumulated amortization for definite-lived intangible assets as of September 30, 2018 and December 31, 2017 were as follows:

	Gross Carrying				Accumulated
	Amount				Amortization
	2018		2017		2018		2017
Customer lists and rights to sell	$	75,424	$	76,581	$	28,542	$	25,394
Trademarks, formulations and product technology		33,561		33,025		15,987		14,309
Other		5,962		6,114		5,606		5,514
Total definite-lived intangible assets	$	114,947	$	115,720	$	50,135	$	45,217

The Company recorded $1.8 million and $5.5 million of amortization expense for the three and nine months ended September 30, 2018, respectively. Comparatively, the Company recorded $1.9 million and $5.5 million of amortization expense for the three and nine months ended September 30, 2017, respectively. Estimated annual aggregate amortization expense for the current year and subsequent five years is as follows:

For the year ended December 31, 2018	$	7,373
For the year ended December 31, 2019		7,211
For the year ended December 31, 2020		6,928
For the year ended December 31, 2021		6,571
For the year ended December 31, 2022		6,414
For the year ended December 31, 2023		6,193

The Company has two indefinite-lived intangible assets totaling $1.1 million for trademarks as of September 30, 2018 and December 31, 2017.

Debt	9 Months Ended
Debt	Sep. 30, 2018
Debt [Abstract]
Debt Disclosure [Text Block]	Note 14 – Debt The Company’s primary credit facility (“the Credit Facility”) is a $300.0 million syndicated multicurrency credit agreement with a group of lenders. The maximum amount available under the Credit Facility can be increased to $400.0 million at the Company’s option if the lenders agree and the Company satisfies certain conditions. Borrowings under the Credit Facility generally bear interest at a base rate or LIBOR rate plus a margin. The Credit Facility has certain financial and other covenants, with the key financial covenant requiring that the Company’s consolidated total debt to adjusted EBITDA ratio cannot exceed 3.50 to 1. As of September 30, 2018, and December 31, 2017, the Company’s total debt to adjusted EBITDA ratio was below 1.0 to 1, and the Company was also in compliance with all of its other covenants. During the third quarter of 2018, the Credit Facility was amended and restated to extend the maturity date to December 15, 2019. As of September 30, 2018, and December 31, 2017, the Company had total credit facility borrowings of $34.8 million and $48.5 million, respectively, primarily under the Credit Facility. The Company’s other debt obligations were primarily industrial development bonds and municipality-related loans as of September 30, 2018 and December 31, 2017, which includes a $5.0 million industrial development bond that matures in December 2018. This bond is included within the caption Short-term borrowings and current portion of long-term debt on the Company’s Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017. The Company expects to repay the amount due for this bond at its maturity with available cash on hand.

Equity and Noncontrolling Interest

9 Months Ended

Sep. 30, 2018

Stockholders Equity [Abstract]

Stockholders Equity Note Disclosure [Text Block]

Note 15 – Equity

The following tables present the changes in equity, net of tax, for the three and nine months ended September 30, 2018 and 2017:

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at June 30, 2018			$	13,331	$	94,984	$	387,498	$	(74,351)	$	1,215	$	422,677
	Net income			—		—		19,690		—		81		19,771
	Amounts reported in other comprehensive
		loss		—		—		—		(5,981)		(38)		(6,019)
	Dividends ($0.37 per share)			—		—		(4,933)		—		—		(4,933)
	Share issuance and equity-based
		compensation plans		3		1,137		—		—		—		1,140
Balance at September 30, 2018			$	13,334	$	96,121	$	402,255	$	(80,332)	$	1,258	$	432,636

Balance at June 30, 2017			$	13,310	$	113,747	$	374,001	$	(72,938)	$	11,474	$	439,594
	Net income			—		—		11,142		—		562		11,704
	Amounts reported in other comprehensive
		income (loss)		—		—		—		6,265		(153)		6,112
	Dividends ($0.355 per share)			—		—		(4,722)		—		—		(4,722)
	Share issuance and equity-based
		compensation plans		(11)		(618)		—		—		—		(629)
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at December 31, 2017			$	13,308	$	93,528	$	365,182	$	(65,100)	$	1,946	$	408,864
	Net income			—		—		51,668		—		260		51,928
	Amounts reported in other comprehensive
		loss		—		—		—		(15,232)		(114)		(15,346)
	Dividends ($1.095 per share)			—		—		(14,595)		—		—		(14,595)
	Distributions to noncontrolling affiliate			—		—		—		—		(834)		(834)
	Share issuance and equity-based
		compensation plans		26		2,593		—		—		—		2,619
Balance at September 30, 2018			$	13,334	$	96,121	$	402,255	$	(80,332)	$	1,258	$	432,636

Balance at December 31, 2016			$	13,278	$	112,475	$	364,414	$	(87,407)	$	9,846	$	412,606
	Net income			—		—		30,040		—		1,619		31,659
	Amounts reported in other comprehensive
		income		—		—		—		20,734		418		21,152
	Dividends ($1.055 per share)			—		—		(14,033)		—		—		(14,033)
	Share issuance and equity-based
		compensation plans		21		654		—		—		—		675
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059

The following tables show the reclassifications from and resulting balances of AOCI for the three and nine months ended September 30, 2018 and 2017:

							Unrealized
			Currency		Defined		(Loss) Gain in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at June 30, 2018			$	(42,069)	$	(32,513)	$	231	$	(74,351)
	Other comprehensive (loss) income before
		reclassifications		(6,821)		99		274		(6,448)
	Amounts reclassified from AOCI			—		756		(69)		687
	Current period other comprehensive (loss) income			(6,821)		855		205		(5,761)
	Related tax amounts			—		(177)		(43)		(220)
	Net current period other comprehensive (loss) income			(6,821)		678		162		(5,981)
Balance at September 30, 2018			$	(48,890)	$	(31,835)	$	393	$	(80,332)

Balance at June 30, 2017			$	(40,062)	$	(34,059)	$	1,183	$	(72,938)
	Other comprehensive income (loss) before
		reclassifications		5,917		(611)		688		5,994
	Amounts reclassified from AOCI			—		784		(254)		530
	Current period other comprehensive income			5,917		173		434		6,524
	Related tax amounts			—		(111)		(148)		(259)
	Net current period other comprehensive income			5,917		62		286		6,265
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)

							Unrealized
			Currency		Defined		(Loss) Gain in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at December 31, 2017			$	(31,893)	$	(34,093)	$	886	$	(65,100)
	Other comprehensive (loss) income before
		reclassifications		(16,997)		563		(1,064)		(17,498)
	Amounts reclassified from AOCI			—		2,318		440		2,758
	Current period other comprehensive (loss) income			(16,997)		2,881		(624)		(14,740)
	Related tax amounts			—		(623)		131		(492)
	Net current period other comprehensive (loss) income			(16,997)		2,258		(493)		(15,232)
Balance at September 30, 2018			$	(48,890)	$	(31,835)	$	393	$	(80,332)

Balance at December 31, 2016			$	(52,255)	$	(36,168)	$	1,016	$	(87,407)
	Other comprehensive income (loss) before
		reclassifications		18,110		(684)		1,578		19,004
	Amounts reclassified from AOCI			—		4,284		(889)		3,395
	Current period other comprehensive income			18,110		3,600		689		22,399
	Related tax amounts			—		(1,429)		(236)		(1,665)
	Net current period other comprehensive income			18,110		2,171		453		20,734
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)

Approximately 75% and 25% of the amounts reclassified from AOCI to the Condensed Consolidated Statements of Income for defined benefit retirement plans during the three and nine months ended September 30, 2018 and 2017 were recorded in SG&A and COGS, respectively. See Note 8 of Notes to Condensed Consolidated Financial Statements for further information. All reclassifications related to unrealized gain (loss) in 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 for non-controlling interest are related to currency translation adjustments.

Business Acquisitions	9 Months Ended
Business Acquisitions	Sep. 30, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Note 16 – Business Acquisitions In March 2018, the Company purchased certain formulations and product technology for the mining industry for its North America reportable operating segment for $1.0 million. The Company allocated the entire purchase price to intangible assets representing formulations and product technology, to be amortized over 10 years. In accordance with the terms of the agreement, $0.5 million of the purchase price was paid at signing, with the remaining $0.5 million of the purchase price expected to be paid within the next 12 months and recorded as an other current liability on the Company’s Condensed Consolidated Balance Sheet as of September 30, 2018. In December 2017, the Company acquired the remaining 45% ownership interest in its India affiliate, Quaker Chemical India Private Limited (“QCIL”), for 2,025.0 million INR or approximately $31.8 million. QCIL is part of the Company’s Asia/Pacific reportable operating segment. In May 2017, the Company acquired assets associated with a business that markets, sells and manufactures certain metalworking fluids for its North America reportable operating segment for 7.3 million CAD or approximately $5.4 million. In November 2016, the Company acquired Lubricor Inc. and its affiliated entities (“Lubricor”), a metalworking fluids manufacturer headquartered in Waterloo, Ontario, for its North America reportable operating segment for 16.0 million CAD or approximately $12.0 million. During the first quarter of 2017, the Company identified and recorded an adjustment to the allocation of the purchase price for the Lubricor acquisition. The adjustment was the result of finalizing a post-closing settlement based on the Company’s assessment of additional information related to assets acquired and liabilities assumed. As of December 31, 2017, the allocation of the purchase price for all of the Company’s 2016 and 2017 acquisitions were finalized. The results of operations of the acquired businesses and assets are included in the Condensed Consolidated Statements of Income from their respective acquisition dates. Transaction expenses associated with these acquisitions are included in SG&A in the Company’s Condensed Consolidated Statements of Income. Certain pro forma and other information are not presented, as the operations of the acquired businesses are not material to the overall operations of the Company for the periods presented.

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Note 17 – Fair Value Measurements

The Company has valued its company-owned life insurance policies at fair value. These assets are subject to fair value measurement as follows:

			Fair Value Measurements at September 30, 2018
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,649		$	—	$	1,649	$	—
Total	$	1,649		$	—	$	1,649	$	—

			Fair Value Measurements at December 31, 2017
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,594		$	—	$	1,594	$	—
Total	$	1,594		$	—	$	1,594	$	—

The fair values of Company-owned life insurance assets are based on quotes for like instruments with similar credit ratings and terms. The Company did not hold any Level 3 investments as of September 30, 2018 or December 31, 2017, respectively, so related disclosures have not been included.

- 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 + Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments And Contingencies Disclosure [Text Block]	Note 18 – Commitments and Contingencies The Company previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017 that AC Products, Inc. (“ACP”), a wholly owned subsidiary, has been operating a groundwater treatment system to hydraulically contain groundwater contamination emanating from ACP’s site, the principal contaminant of which is perchloroethylene. As of September 30, 2018, ACP believes it is close to meeting the conditions for closure of the groundwater treatment system, but continues to operate this system while in discussions with the relevant authorities. As of September 30, 2018, the Company believes that the range of potential-known liabilities associated with the balance of the ACP water remediation program is approximately $0.1 million to $1.0 million. The low and high ends of the range are based on the length of operation of the treatment system as determined by groundwater modeling. Costs of operation include the operation and maintenance of the extraction well, groundwater monitoring and program management. The Company previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017 that an inactive subsidiary of the Company that was acquired in 1978 sold certain products containing asbestos, primarily on an installed basis, and is among the defendants in numerous lawsuits alleging injury due to exposure to asbestos. During the three and nine months ended September 30, 2018, there have been no significant changes to the facts or circumstances of this matter previously disclosed, aside from on-going claims and routine payments associated with this litigation. Based on a continued analysis of the existing and anticipated future claims against this subsidiary, it is currently projected that the subsidiary’s total liability over the next 50 years for these claims is approximately $1.9 million (excluding costs of defense). The Company believes, although there can be no assurance regarding the outcome of other unrelated environmental matters, that it has made adequate accruals for costs associated with other environmental problems of which it is aware. Approximately $0.2 million was accrued at September 30, 2018 and December 31, 2017, respectively, to provide for such anticipated future environmental assessments and remediation costs. 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.

Accounting Policies (Policies)	9 Months Ended
Accounting Policies (Policies)	Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis Of Accounting Policy [Policy Text Block]	The condensed consolidated financial statements included herein are unaudited and have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) for interim financial reporting and the United States Securities and Exchange Commission (“SEC”) regulations. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the financial statements reflect all adjustments (consisting only of normal recurring adjustments, except certain material adjustments, as discussed below) which are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods. The results for the three and nine months ended September 30, 2018, respectively, are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the Company’s Annual Report filed on Form 10-K for the year ended December 31, 2017.
Revenue Recognition Accounting Policy, Gross and Net Revenue Disclosure [Policy Text Block]	As part of the Company’s CMS, certain third-party product sales to customers are managed by the Company. Where the Company acts as a principal, revenues are recognized on a gross reporting basis at the selling price negotiated with its customers. Where the Company acts as an agent, revenue is recognized on a net reporting basis at the amount of the administrative fee earned by the Company for ordering the goods.
Revenue Recognition [Policy Text Block]	The Company applies the FASB’s guidance on revenue recognition which requires the Company to recognize 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 the five-step model in the FASB’s guidance, 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 a performance obligation.
Revenue Recognition Deferred Revenue [Policy Text Block]	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. The Company’s contract liabilities primarily represent deferred revenue recorded for customer payments received by the Company prior to the Company satisfying the associated performance obligation. Deferred revenues are presented within other current liabilities in the Company’s Condensed Consolidated Balance Sheets.
Goodwill And Intangible Assets, Goodwill, Policy [Policy Text Block]	The Company completes its annual impairment test 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. The Company continually evaluates financial performance, economic conditions and other relevant developments in assessing if an interim period impairment test for one or more of its reporting units is necessary.

Net Sales and Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Disaggregation Of Revenue [Abstract]

Disaggregation Of Revenue [Table Text Block]

	Three Months Ended September 30, 2018
	North						South		Consolidated
	America		EMEA		Asia/Pacific		America		Total
Net sales	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

Customer Industries
Primary metals	$	40,448	$	24,188	$	35,108	$	4,781	$	104,525
Metalworking		45,189		27,986		19,585		3,768		96,528
Coatings and other		16,069		3,324		1,064		512		20,969
	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

Timing of Revenue Recognized
Product sales at a point in time	$	98,965	$	55,437	$	53,998	$	8,992	$	217,392
Services transferred over time		2,741		61		1,759		69		4,630
	$	101,706	$	55,498	$	55,757	$	9,061	$	222,022

	Nine Months Ended September 30, 2018
	North						South		Consolidated
	America		EMEA		Asia/Pacific		America		Total
Net sales	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Customer Industries
Primary metals	$	117,174	$	77,692	$	101,026	$	15,115	$	311,007
Metalworking		128,709		88,909		56,486		11,416		285,520
Coatings and other		45,035		11,118		2,370		989		59,512
	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Timing of Revenue Recognized
Product sales at a point in time	$	282,513	$	177,546	$	153,863	$	27,298	$	641,220
Services transferred over time		8,405		173		6,019		222		14,819
	$	290,918	$	177,719	$	159,882	$	27,520	$	656,039

Business Segments (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting Measurement Disclosures [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2018		2017		2018		2017
Net sales
	North America	$	101,706	$	90,450	$	290,918	$	268,122
	EMEA		55,498		58,775		177,719		167,209
	Asia/Pacific		55,757		54,200		159,882		147,074
	South America		9,061		9,493		27,520		26,605
Total net sales		$	222,022	$	212,918	$	656,039	$	609,010

Operating earnings, excluding indirect operating expenses
	North America	$	24,558	$	18,888	$	68,160	$	59,146
	EMEA		8,577		8,862		27,966		26,325
	Asia/Pacific		14,761		13,963		41,524		36,018
	South America		1,214		965		2,963		2,826
Total operating earnings, excluding indirect operating expenses			49,110		42,678		140,613		124,315
Combination-related expenses			(2,904)		(9,675)		(12,404)		(23,088)
Indirect operating expenses			(19,460)		(17,108)		(54,971)		(50,067)
Amortization expense			(1,827)		(1,886)		(5,525)		(5,490)
Consolidated operating income			24,919		14,009		67,713		45,670
Other (expense) income, net			(523)		249		(631)		(1,427)
Interest expense			(1,510)		(793)		(4,804)		(2,229)
Interest income			521		762		1,581		1,825
Consolidated income before taxes and equity in net income of
	associated companies	$	23,407	$	14,227	$	63,859	$	43,839

Restructuring Activities (Tables)

9 Months Ended

Sep. 30, 2018

Restructuring And Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

		North
		America		EMEA		Total
Accrued restructuring as of December 31, 2016		$	196	$	474	$	670
	Restructuring charges and adjustments		(126)		126		—
	Cash payments		(70)		(605)		(675)
	Currency translation adjustments		—		5		5
Accrued restructuring as of September 30, 2017		$	—	$	—	$	—

Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Share Based Compensation [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Stock options	$	267	$	243	$	785	$	714
Nonvested stock awards and restricted stock units		550		717		1,901		2,314
Employee stock purchase plan		24		22		68		66
Non-elective and elective 401(k) matching contribution in stock		—		8		—		72
Director stock ownership plan		31		34		93		103
Total share-based compensation expense	$	872	$	1,024	$	2,847	$	3,269

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Number of options granted	35,842
Dividend yield	1.37	%
Expected volatility	24.73	%
Risk-free interest rate	2.54	%
Expected term (years)	4.0

Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three Months Ended September 30,								Nine Months Ended September 30,
					Other								Other
					Postretirement								Postretirement
	Pension Benefits				Benefits				Pension Benefits				Benefits
		2018		2017		2018		2017		2018		2017		2018		2017
Service cost	$	938	$	921	$	—	$	2	$	2,886	$	2,710	$	5	$	6
Interest cost		1,015		994		31		36		3,096		3,005		97		108
Expected return on plan assets		(1,229)		(1,276)		—		—		(3,793)		(3,857)		—		—
Settlement charge		—		—		—		—		—		1,860		—		—
Actuarial loss amortization		782		798		2		13		2,375		2,459		31		40
Prior service cost amortization		(28)		(28)		—		—		(88)		(76)		—		—
Net periodic benefit cost	$	1,478	$	1,409	$	33	$	51	$	4,476	$	6,101	$	133	$	154

Other Income (Expense) (Tables)

9 Months Ended

Sep. 30, 2018

Other Income And Expenses [Abstract]

Schedule Of Other Nonoperating Income (Expense) [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Income from third party license fees	$	144	$	141	$	583	$	612
Foreign exchange (losses) gains, net		(285)		545		(1,007)		580
Gain on fixed asset disposals, net		81		22		680		50
Non-income tax refunds and other related credits		127		130		668		748
Pension and postretirement benefit costs, non-service components		(568)		(537)		(1,713)		(3,539)
Other non-operating income		115		47		374		288
Other non-operating expense		(137)		(99)		(216)		(166)
Total other (expense) income, net	$	(523)	$	249	$	(631)	$	(1,427)

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2018		2017		2018		2017
Basic earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	19,690	$	11,142	$	51,668	$	30,040
	Less: income allocated to participating securities		(77)		(76)		(226)		(222)
	Net income available to common shareholders	$	19,613	$	11,066	$	51,442	$	29,818
	Basic weighted average common shares outstanding		13,278,259		13,217,165		13,263,417		13,196,255
Basic earnings per common share		$	1.48	$	0.84	$	3.88	$	2.26

Diluted earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	19,690	$	11,142	$	51,668	$	30,040
	Less: income allocated to participating securities		(77)		(76)		(226)		(222)
	Net income available to common shareholders	$	19,613	$	11,066	$	51,442	$	29,818
	Basic weighted average common shares outstanding		13,278,259		13,217,165		13,263,417		13,196,255
	Effect of dilutive securities		37,282		34,528		33,928		41,818
	Diluted weighted average common shares outstanding		13,315,541		13,251,693		13,297,345		13,238,073
Diluted earnings per common share		$	1.47	$	0.83	$	3.87	$	2.25

Restricted Cash (Tables)

9 Months Ended

Sep. 30, 2018

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]

Schedule Of Cash And Cash Equivalents [Table Text Block]

	September 30,				December 31,
	2018		2017		2017		2016
Cash and cash equivalents	$	99,810	$	109,088	$	89,879	$	88,818
Restricted cash included in other assets		20,594		21,376		21,171		21,883
Cash, cash equivalents and restricted cash	$	120,404	$	130,464	$	111,050	$	110,701

Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

		North						South
		America		EMEA		Asia/Pacific		America		Total
Balance as of December 31, 2017		$	47,571	$	20,504	$	15,456	$	2,503	$	86,034
	Currency translation adjustments		(27)		(930)		(894)		(488)		(2,339)
Balance as of September 30, 2018		$	47,544	$	19,574	$	14,562	$	2,015	$	83,695

Schedule Of Finite Lived Intangible Assets [Table Text Block]

	Gross Carrying				Accumulated
	Amount				Amortization
	2018		2017		2018		2017
Customer lists and rights to sell	$	75,424	$	76,581	$	28,542	$	25,394
Trademarks, formulations and product technology		33,561		33,025		15,987		14,309
Other		5,962		6,114		5,606		5,514
Total definite-lived intangible assets	$	114,947	$	115,720	$	50,135	$	45,217

Schedule of Finite Lived Intangible Assets Future Amortization Expense [TableText Block]

For the year ended December 31, 2018	$	7,373
For the year ended December 31, 2019		7,211
For the year ended December 31, 2020		6,928
For the year ended December 31, 2021		6,571
For the year ended December 31, 2022		6,414
For the year ended December 31, 2023		6,193

Equity and Noncontrolling Interest (Tables)

9 Months Ended

Sep. 30, 2018

Stockholders Equity [Abstract]

Schedule of Stockholders Equity [Table Text Block]

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at June 30, 2018			$	13,331	$	94,984	$	387,498	$	(74,351)	$	1,215	$	422,677
	Net income			—		—		19,690		—		81		19,771
	Amounts reported in other comprehensive
		loss		—		—		—		(5,981)		(38)		(6,019)
	Dividends ($0.37 per share)			—		—		(4,933)		—		—		(4,933)
	Share issuance and equity-based
		compensation plans		3		1,137		—		—		—		1,140
Balance at September 30, 2018			$	13,334	$	96,121	$	402,255	$	(80,332)	$	1,258	$	432,636

Balance at June 30, 2017			$	13,310	$	113,747	$	374,001	$	(72,938)	$	11,474	$	439,594
	Net income			—		—		11,142		—		562		11,704
	Amounts reported in other comprehensive
		income (loss)		—		—		—		6,265		(153)		6,112
	Dividends ($0.355 per share)			—		—		(4,722)		—		—		(4,722)
	Share issuance and equity-based
		compensation plans		(11)		(618)		—		—		—		(629)
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at December 31, 2017			$	13,308	$	93,528	$	365,182	$	(65,100)	$	1,946	$	408,864
	Net income			—		—		51,668		—		260		51,928
	Amounts reported in other comprehensive
		loss		—		—		—		(15,232)		(114)		(15,346)
	Dividends ($1.095 per share)			—		—		(14,595)		—		—		(14,595)
	Distributions to noncontrolling affiliate			—		—		—		—		(834)		(834)
	Share issuance and equity-based
		compensation plans		26		2,593		—		—		—		2,619
Balance at September 30, 2018			$	13,334	$	96,121	$	402,255	$	(80,332)	$	1,258	$	432,636

Balance at December 31, 2016			$	13,278	$	112,475	$	364,414	$	(87,407)	$	9,846	$	412,606
	Net income			—		—		30,040		—		1,619		31,659
	Amounts reported in other comprehensive
		income		—		—		—		20,734		418		21,152
	Dividends ($1.055 per share)			—		—		(14,033)		—		—		(14,033)
	Share issuance and equity-based
		compensation plans		21		654		—		—		—		675
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

							Unrealized
			Currency		Defined		(Loss) Gain in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at June 30, 2018			$	(42,069)	$	(32,513)	$	231	$	(74,351)
	Other comprehensive (loss) income before
		reclassifications		(6,821)		99		274		(6,448)
	Amounts reclassified from AOCI			—		756		(69)		687
	Current period other comprehensive (loss) income			(6,821)		855		205		(5,761)
	Related tax amounts			—		(177)		(43)		(220)
	Net current period other comprehensive (loss) income			(6,821)		678		162		(5,981)
Balance at September 30, 2018			$	(48,890)	$	(31,835)	$	393	$	(80,332)

Balance at June 30, 2017			$	(40,062)	$	(34,059)	$	1,183	$	(72,938)
	Other comprehensive income (loss) before
		reclassifications		5,917		(611)		688		5,994
	Amounts reclassified from AOCI			—		784		(254)		530
	Current period other comprehensive income			5,917		173		434		6,524
	Related tax amounts			—		(111)		(148)		(259)
	Net current period other comprehensive income			5,917		62		286		6,265
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)

							Unrealized
			Currency		Defined		(Loss) Gain in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at December 31, 2017			$	(31,893)	$	(34,093)	$	886	$	(65,100)
	Other comprehensive (loss) income before
		reclassifications		(16,997)		563		(1,064)		(17,498)
	Amounts reclassified from AOCI			—		2,318		440		2,758
	Current period other comprehensive (loss) income			(16,997)		2,881		(624)		(14,740)
	Related tax amounts			—		(623)		131		(492)
	Net current period other comprehensive (loss) income			(16,997)		2,258		(493)		(15,232)
Balance at September 30, 2018			$	(48,890)	$	(31,835)	$	393	$	(80,332)

Balance at December 31, 2016			$	(52,255)	$	(36,168)	$	1,016	$	(87,407)
	Other comprehensive income (loss) before
		reclassifications		18,110		(684)		1,578		19,004
	Amounts reclassified from AOCI			—		4,284		(889)		3,395
	Current period other comprehensive income			18,110		3,600		689		22,399
	Related tax amounts			—		(1,429)		(236)		(1,665)
	Net current period other comprehensive income			18,110		2,171		453		20,734
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements at September 30, 2018
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,649		$	—	$	1,649	$	—
Total	$	1,649		$	—	$	1,649	$	—

			Fair Value Measurements at December 31, 2017
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,594		$	—	$	1,594	$	—
Total	$	1,594		$	—	$	1,594	$	—

Condensed Financial Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Inflationary Percentage	100.00%
Equity Method Investment	$ 22,471			$ 25,690
Financial Statement Line Items With Differences In Reported Amount And Reporting Currency Denominated Amounts [Line Items]
Currency Conversion impacts of hyper-inflationary accounting and remeasurement losses	During the three and nine months ended September 30, 2018, the Company recorded $0.5 million and $0.8 million of remeasurement losses associated with the applicable currency conversions related to Venezuela and Argentina.	During the three and nine months ended September 30, 2017, the Company recorded less than $0.1 million and $0.4 million of remeasurement losses related to Venezuela.
Kelko (Venezuela) [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment			$ 100
Argentina Assets Total [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	1.00%
Argentina Sales Revenue Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	1.00%

Houghton Combination (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Houghton Combination (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Business Combination Separately Recognized Transactions [Line Items]
BusinessCombinationSeparatelyRecognizedTransactionsDescription			On April 4, 2017, Quaker entered into a share purchase agreement with Gulf Houghton Lubricants, Ltd. to purchase the entire issued and outstanding share capital of Houghton International, Inc. (“Houghton”) (herein referred to as “the Combination”). The shares will be bought for aggregate purchase consideration consisting of: (i) $172.5 million in cash; (ii) a number of shares of common stock, $1.00 par value per share, of the Company comprising 24.5% of the common stock outstanding upon the closing of the Combination; and (iii) the Company’s assumption of Houghton’s net indebtedness as of the closing of the Combination, which was approximately $690 million at signing. At closing, the total aggregate purchase consideration is dependent on the Company’s stock price and the level of Houghton’s indebtedness. The Company secured $1.15 billion in commitments from Bank of America Merrill Lynch and Deutsche Bank to fund the Combination and to provide additional liquidity, and has since replaced these commitments with a syndicated bank agreement (“the New Credit Facility”) with a group of lenders for $1.15 billion. The New Credit Facility is contingent upon and will not be effective until the closing of the Combination. During the third quarter of 2018 the Company extended the bank commitment for the New Credit Facility through December 15, 2018. The New Credit Facility is comprised of a $400.0 million multicurrency revolver, a $600.0 million USD term loan and a $150.0 million EUR equivalent term loan, each with a five-year term from the date the New Credit Facility becomes effective. The maximum amount available under the New Credit Facility can be increased by $200.0 million at the Company’s option if the lenders agree and the Company satisfies certain conditions. Borrowings under the New Credit Facility will bear interest at a base rate or LIBOR rate plus a margin. The Company currently estimates the annual floating rate cost will be in the 3.50% to 3.75% range based on current market interest rates. The New Credit Facility will be subject to certain financial and other covenants, including covenants that the Company’s consolidated net debt to adjusted EBITDA ratio cannot initially exceed 4.25 to 1 and the Company’s consolidated adjusted EBITDA to interest expense ratio cannot be less than 3.0 to 1. Both the USD and EUR equivalent term loans will have quarterly principal amortization during their respective five-year terms, with 5% amortization of the principal balance due in years 1 and 2, 7.5% in year 3, and 10% in years 4 and 5, with the remaining principal amounts due at maturity. Until closing, the Company will incur certain interest costs paid to maintain the bank commitment (“ticking fees”), which began to accrue on September 29, 2017 and bear an interest rate of 0.30% per annum.
Business Combination Transaction-Related Expenses	$ 3.8	$ 9.7	$ 14.4	$ 23.1
Business Combination Liabilities	$ 5.1		$ 5.1		$ 5.5

Recently Issued Accounting Standards - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
New Accounting Pronouncement Or Change In Accounting Principle Description Of Prior period Information Retrospectively Adjusted	Adoption of the revenue recognition guidance did not have a material impact on the Company’s reported earnings or cash flows, however, adoption did increase the amount and level of disclosures concerning the Company’s net sales and did result in one adjustment to the Company’s balance sheet. As a result of the Company’s impact assessment and adoption using the modified retrospective adoption approach, the Company recorded an adjustment to its Condensed Consolidated Balance Sheet as of December 31, 2017 to adjust the Company’s estimate of variable consideration relating to customers’ expected rights to return product. This adjustment resulted in an increase to other current liabilities of $1.0 million, an increase to non-current deferred tax assets of $0.2 million and a decrease to retained earnings of $0.8 million. There were no other impacts recorded as a result of adopting the revenue recognition guidance. The impact of adoption of the new revenue recognition guidance was immaterial for the three and nine months ended September 30, 2018 and the Company expects the impact to be immaterial on an ongoing basis.
Contractual Obligation		$ 27.6

Net Sales and Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenues [Abstract]
Net Reporting Amount	$ 11.7	$ 11.2	$ 35.8	$ 33.0
Deferred Revenue	1.6		1.6		$ 1.5
Deferred Revenue Revenue Recognized 1	$ 1.6		$ 4.4
Top Five Customers Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					18.00%
Top Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					8.00%

Net Sales and Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Product Information [Line Items]
Net Sales	$ 222,022	$ 212,918	$ 656,039	$ 609,010
North America [Member]
Product Information [Line Items]
Net Sales	101,706	90,450	290,918	268,122
EMEA [Member]
Product Information [Line Items]
Net Sales	55,498	58,775	177,719	167,209
Asia Pacific [Member]
Product Information [Line Items]
Net Sales	55,757	54,200	159,882	147,074
South America [Member]
Product Information [Line Items]
Net Sales	9,061	$ 9,493	27,520	$ 26,605
Transferred At Point In Time [Member]
Product Information [Line Items]
Net Sales	217,392		641,220
Transferred At Point In Time [Member] \| North America [Member]
Product Information [Line Items]
Net Sales	98,965		282,513
Transferred At Point In Time [Member] \| EMEA [Member]
Product Information [Line Items]
Net Sales	55,437		177,546
Transferred At Point In Time [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net Sales	53,998		153,863
Transferred At Point In Time [Member] \| South America [Member]
Product Information [Line Items]
Net Sales	8,992		27,298
Transferred Over Time [Member]
Product Information [Line Items]
Net Sales	4,630		14,819
Transferred Over Time [Member] \| North America [Member]
Product Information [Line Items]
Net Sales	2,741		8,405
Transferred Over Time [Member] \| EMEA [Member]
Product Information [Line Items]
Net Sales	61		173
Transferred Over Time [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net Sales	1,759		6,019
Transferred Over Time [Member] \| South America [Member]
Product Information [Line Items]
Net Sales	69		222
Primary Metals [Member]
Product Information [Line Items]
Net Sales	104,525		311,007
Primary Metals [Member] \| North America [Member]
Product Information [Line Items]
Net Sales	40,448		117,174
Primary Metals [Member] \| EMEA [Member]
Product Information [Line Items]
Net Sales	24,188		77,692
Primary Metals [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net Sales	35,108		101,026
Primary Metals [Member] \| South America [Member]
Product Information [Line Items]
Net Sales	4,781		15,115
Metalworking [Member]
Product Information [Line Items]
Net Sales	96,528		285,520
Metalworking [Member] \| North America [Member]
Product Information [Line Items]
Net Sales	45,189		128,709
Metalworking [Member] \| EMEA [Member]
Product Information [Line Items]
Net Sales	27,986		88,909
Metalworking [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net Sales	19,585		56,486
Metalworking [Member] \| South America [Member]
Product Information [Line Items]
Net Sales	3,768		11,416
Coatings and Other [Member]
Product Information [Line Items]
Net Sales	20,969		59,512
Coatings and Other [Member] \| North America [Member]
Product Information [Line Items]
Net Sales	16,069		45,035
Coatings and Other [Member] \| EMEA [Member]
Product Information [Line Items]
Net Sales	3,324		11,118
Coatings and Other [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net Sales	1,064		2,370
Coatings and Other [Member] \| South America [Member]
Product Information [Line Items]
Net Sales	$ 512		$ 989

Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Business Segments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 222,022	$ 212,918	$ 656,039	$ 609,010
Operating Earnings, Excluding Indirect Operating Expenses	49,110	42,678	140,613	124,315
Reconciliation from Segment Totals to Consolidated [Abstract]
Combination-related expenses	(2,904)	(9,675)	(12,404)	(23,088)
Indirect Operating Expenses	(19,460)	(17,108)	(54,971)	(50,067)
Amortization	(1,827)	(1,886)	(5,525)	(5,490)
Operating income	24,919	14,009	67,713	45,670
Other (expense) income, net	(523)	249	(631)	(1,427)
Interest Expense	(1,510)	(793)	(4,804)	(2,229)
Interest Income	521	762	1,581	1,825
Income Before Taxes and Equity in Net Income of Associated Companies	23,407	14,227	63,859	43,839
North America [Member]
Segment Reporting Information [Line Items]
Net Sales	101,706	90,450	290,918	268,122
Operating Earnings, Excluding Indirect Operating Expenses	24,558	18,888	68,160	59,146
EMEA [Member]
Segment Reporting Information [Line Items]
Net Sales	55,498	58,775	177,719	167,209
Operating Earnings, Excluding Indirect Operating Expenses	8,577	8,862	27,966	26,325
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net Sales	55,757	54,200	159,882	147,074
Operating Earnings, Excluding Indirect Operating Expenses	14,761	13,963	41,524	36,018
South America [Member]
Segment Reporting Information [Line Items]
Net Sales	9,061	9,493	27,520	26,605
Operating Earnings, Excluding Indirect Operating Expenses	$ 1,214	$ 965	$ 2,963	$ 2,826

Restructuring Activities (Details) $ in Thousands	9 Months Ended
Restructuring Activities (Details) $ in Thousands	Sep. 30, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	$ 670
Cash Payments	(675)
Currency Translation Adjustments	5
Accrued Restructuring, Ending Balance	0
North America [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	196
Restructuring and adjustments	(126)
Cash Payments	(70)
Currency Translation Adjustments	0
Accrued Restructuring, Ending Balance	0
EMEA [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	474
Restructuring and adjustments	126
Cash Payments	(605)
Currency Translation Adjustments	5
Accrued Restructuring, Ending Balance	$ 0

Share-Based Compensation - Expense Table (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ 872	$ 1,024	$ 2,847	$ 3,269
Stock Options Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	267	243	785	714
Nonvested Stock Awards and Restricted Stock Unit Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	550	717	1,901	2,314
Employee Stock Purchase Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	24	22	68	66
401 (k) Matching Stock Contribution Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	0	8	0	72
Directors Stock Ownership Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ 31	$ 34	$ 93	$ 103

Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation [Abstract]
Option Award Vesting Period			3 years
Share Based Compensation [Line Items]
Share-based Compensation Expense in Period, Stock Option Awards	$ 872	$ 1,024	$ 2,847	$ 3,269
Stock Options [Member]
Share Based Compensation [Line Items]
Unrecognized Share-Based Compensation Expense, Stock Option Awards	1,500		$ 1,500
Weighted Average Remaining Life, Nonvested Stock Awards			1 year 11 months
Restricted Stock LTIP Plan [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	2,700		$ 2,700
Weighted Average Remaining Life, Nonvested Stock Awards			1 year 10 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			16,166
Restricted Stock Units (RSUs) LTIP Plan [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 200		$ 200
Weighted Average Remaining Life, Nonvested Stock Awards			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			1,480

Share-Based Compensation - Options Grant (Details)	9 Months Ended
Share-Based Compensation - Options Grant (Details)	Sep. 30, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	35,842
Dividend Yield	1.37%
Expected Volatility	24.73%
Risk-free Interest Rate	2.54%
Expected Term (Years)	4 years

Pension and Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Description Of Settlements And Curtailments			During the second quarter of 2017, one of the Company’s U.S. pension plans offered a cash settlement to its vested terminated participants which allowed them to receive the value of their pension benefits as a single lump sum payment. As payments from the U.S. pension plan for this cash-out offering exceeded the service and interest cost components of the U.S. pension plan expense for 2017, the Company recorded a settlement charge of approximately $1.9 million. This 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 by these payments.
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 938	$ 921		$ 2,886	$ 2,710
Defined Benefit Plan, Interest Cost	1,015	994		3,096	3,005
Defined Benefit Plan, Expected Return on Plan Assets	(1,229)	(1,276)		(3,793)	(3,857)
Defined Benefit Plan, Settlement Charge	0	0		0	1,860
Defined Benefit Plan, Amortization of Losses	782	798		2,375	2,459
Defined Benefit Plan, Amortization of Prior Service Cost	(28)	(28)		(88)	(76)
Defined Benefit Plan, Net Periodic Benefit Cost	1,478	1,409		4,476	6,101
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	6,000			6,000
Defined Benefit Plan, Contributions by Employer				5,100
Defined Benefit Plan Effect Of Settlements And Curtailments On Accumulated Benefit Obligation			$ 4,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	2		5	6
Defined Benefit Plan, Interest Cost	31	36		97	108
Defined Benefit Plan, Expected Return on Plan Assets	0	0		0	0
Defined Benefit Plan, Settlement Charge	0	0		0	0
Defined Benefit Plan, Amortization of Losses	2	13		31	40
Defined Benefit Plan, Amortization of Prior Service Cost	0	0		0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 33	$ 51		133	$ 154
Defined Benefit Plan, Contributions by Employer				$ 200

Other Income (Expense) - (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Other Income (Expense) - (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income And Expenses [Abstract]
Income From Third Party License Fees	$ 144	$ 141	$ 583	$ 612
Foreign Exchange (Losses) Gains, Net	(285)	545	(1,007)	580
Gain (loss) on Fixed Asset Disposals, Net	81	22	680	50
Non-Income Tax Refunds and Other Related Credits	127	130	668	748
Pension and Post Retirement Benefit Costs Non-service Components	(568)	(537)	(1,713)	(3,539)
Other Nonoperating Income	115	47	374	288
Other Nonoperating Expense	(137)	(99)	(216)	(166)
Total Other (Expense) Income, Net	$ (523)	$ 249	$ (631)	$ (1,427)
Property Plant And Equipment Additional Disclosures			Gain on fixed asset disposals, net, during the nine months ended September 30, 2018 includes a $0.6 million gain on the sale of a held-for-sale asset.
Foreign Currency Transactions Description			In addition, foreign exchange (losses) gains, net, during the three and nine months ended September 30, 2018 include both a foreign currency transaction loss of approximately $0.5 million related to hyper-inflationary accounting for the Company’s Argentina subsidiary effective July 1, 2018 and a foreign currency transaction gain of approximately $0.4 million related to the liquidation of an inactive legal entity.

Income Taxes and Uncertain Tax Positions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	18.50%	22.10%	21.20%	32.50%
Unrecognized Tax Benefits	$ 7.0		$ 7.0		$ 6.8
Unrecognized Tax Benefits, Interest on Income Taxes Expense	0.1	$ 0.1	0.1
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0.7		0.7		0.6
Unrecognized Tax Benefits, Income Tax Penalties Accrued	1.1		1.1		$ 1.0
Unrecognized Tax Benefits, Income Tax Penalties Expense			0.1	$ 0.2
Unrecognized Tax Benefits Interest Income On Income Taxes		0.1		0.1
Unrecognized Tax Benefits Tax Penalties Income	0.2
Tax Adjustments, Settlements, and Unusual Provisions	1.1		2.3
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease In Unrecognized Tax Benefits Is Reasonably Possible	0.7	$ 0.8	$ 0.7	$ 0.8
Income Tax Examination [Line Items]
Statutory Tax Rate			21.00%	35.00%
Us Tax Reform Act			The Company’s tax adjustments associated with U.S. Tax Reform during the three and nine months ended September 30, 2018, included adjustments to decrease its initial estimate of the one-time deemed repatriation of undistributed earnings on previously untaxed accumulated and current earnings and profits of certain of the Company’s foreign subsidiaries (“Transition Tax”), specifically related to proposed regulations published by the Internal Revenue Service (“IRS”), the U.S Treasury and various state taxing authorities, as well as an increase to its initial estimate of the impact from internal revenue code changes associated with the deductibility of certain executive compensation. To date, the Company has not made any other significant changes to its initial assessments made during the fourth quarter of 2017. As previously disclosed in its Annual Report filed on Form 10-K for the year ended December 31, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as U.S. Tax Reform on December 22, 2017. U.S. Tax Reform includes multiple changes to the U.S. tax code with varying effects on the Company’s results for the three and nine months ended September 30, 2018. The SEC staff issued guidance on accounting for the tax effects of U.S. Tax Reform and provided a one-year measurement period for companies to complete the accounting. Companies are required to reflect the income tax effects of those aspects of U.S. Tax Reform for which the accounting is complete. To the extent that a company’s accounting for certain income tax effects of U.S. Tax Reform are incomplete but the company is able to determine a reasonable estimate, it must record a provisional estimate in its financial statements. The Company has made reasonable interpretations and assumptions with regard to various uncertainties and ambiguities in the application of certain provisions of U.S. Tax Reform. The Company is continuing to evaluate all of the provisions of U.S. Tax Reform and expects to finalize its assessment during the one-year measurement period provided by the SEC to complete the accounting for U.S. Tax Reform. It is possible that the IRS or the U.S. Department of the Treasury could issue subsequent guidance or take positions on audit that differ from the Company’s interpretations and assumptions.
Italy [Member]
Income Tax Examination [Line Items]
Income Tax Examination Description			As previously reported, the Italian tax authorities have assessed additional tax due from the Company’s subsidiary, Quaker Italia S.r.l., relating to the tax years 2007 through 2013. During the second quarter of 2018, the Italian tax authorities assessed additional tax due from Quaker Italia, S.r.l., relating to the tax years 2014 and 2015. The Company plans to meet with the Italian tax authorities by the end of 2018 to discuss these assessments. If these discussions are not successful in materially reducing the assessed tax, then the Company will further evaluate its options including potentially filing for competent authority relief from these assessments under the Mutual Agreement Procedures of the Organization for Economic Co-Operation and Development, consistent with the Company’s previous filings for 2008 through 2013
Maximum [Member] \| Year End December 31, 2018 [Member]
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease In Unrecognized Tax Benefits Is Reasonably Possible	1.1		$ 1.1
Minimum [Member] \| Year End December 31, 2018 [Member]
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease In Unrecognized Tax Benefits Is Reasonably Possible	$ 1.0		$ 1.0
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2015
Foreign Tax Authority [Member] \| The Netherlands [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2012
Foreign Tax Authority [Member] \| United Kingdom [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2012
Foreign Tax Authority [Member] \| Brazil [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2000
Foreign Tax Authority [Member] \| Spain [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2014
Foreign Tax Authority [Member] \| China [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2013
Foreign Tax Authority [Member] \| Italy [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2007
Foreign Tax Authority [Member] \| India [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2015
Foreign Tax Authority [Member] \| Mexico [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2013
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2008

Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 19,690	$ 11,142	$ 51,668	$ 30,040
Less: Income Allocated to Participating Securities	(77)	(76)	(226)	(222)
Net Income Available to Common Shareholders	$ 19,613	$ 11,066	$ 51,442	$ 29,818
Basic Weighted Average Common Shares Outstanding	13,278,259	13,217,165	13,263,417	13,196,255
Basic Earnings Per Common Share	$ 1.48	$ 0.84	$ 3.88	$ 2.26

- 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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- Definition

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

+ References + Details

Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 19,690	$ 11,142	$ 51,668	$ 30,040
Less: Income Allocated to Participating Securities	(77)	(76)	(226)	(222)
Net Income Available to Common Shareholders	$ 19,613	$ 11,066	$ 51,442	$ 29,818
Basic Weighted Average Common Shares Outstanding	13,278,259	13,217,165	13,263,417	13,196,255
Effect of Dilutive Securities	37,282	34,528	33,928	41,818
Diluted Weighted Average Common Shares Outstanding	13,315,541	13,251,693	13,297,345	13,238,073
Diluted Earnings per Common Share	$ 1.47	$ 0.83	$ 3.87	$ 2.25

- 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.

+ References

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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

Earnings Per Share - Antidilutive Shares (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	718	4,300	3,480	4,819

Restricted Cash (Details) - USD ($) $ in Thousands	9 Months Ended
Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 99,810	$ 89,879	$ 109,088	$ 88,818
Restricted Cash	20,594	21,171	21,376	21,883
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents	$ 120,404	$ 111,050	$ 130,464	$ 110,701
Loss Contingency, Settlement Agreement, Terms	The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation

Goodwill Assets (Details) $ in Thousands	9 Months Ended
Goodwill Assets (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 86,034
Goodwill, Translation Adjustments	(2,339)
Goodwill, Ending Balance	83,695
North America [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	47,571
Goodwill, Translation Adjustments	(27)
Goodwill, Ending Balance	47,544
EMEA [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	20,504
Goodwill, Translation Adjustments	(930)
Goodwill, Ending Balance	19,574
Asia Pacific [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	15,456
Goodwill, Translation Adjustments	(894)
Goodwill, Ending Balance	14,562
South America [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	2,503
Goodwill, Translation Adjustments	(488)
Goodwill, Ending Balance	$ 2,015

Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Gross [Abstract]
Customer Lists And Rights To Sell	$ 75,424	$ 76,581
Trademarks, Formulations And Product Technology	33,561	33,025
Other Finite-Lived Intangible Assets, Gross	5,962	6,114
Total	114,947	115,720
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	50,135	45,217
Customer Lists And Rights To Sell [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	28,542	25,394
Trademarks Formulations and Product Technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	15,987	14,309
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,606	$ 5,514

Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization	$ 1,827	$ 1,886	$ 5,525	$ 5,490

Intangible Assets - Future Amortization (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
For the year ended December 31, 2018	$ 7,373
For the year ended December 31, 2019	7,211
For the year ended December 31, 2020	6,928
For the year ended December 31, 2021	6,571
For the year ended December 31, 2022	6,414
For the year ended December 31, 2023	$ 6,193

Intangible Assets - Finite Lived (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-Lived Trademarks	$ 1.1	$ 1.1

Debt - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Debt - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility Current Borrowing Capacity	$ 300.0
Line of Credit Facility Maximum Borrowing Capacity	$ 400.0
Debt Instrument Maturity Date Description	During the third quarter of 2018, the Credit Facility was amended and restated to extend the maturity date to December 15, 2019.
Line of Credit Facility, Covenant Terms	The Credit Facility has certain financial and other covenants, with the key financial covenant requiring that the Company’s consolidated total debt to adjusted EBITDA ratio cannot exceed 3.50 to 1.
Line of Credit Facility, Covenant Compliance	As of September 30, 2018, and December 31, 2017, the Company’s total debt to adjusted EBITDA ratio was below 1.0 to 1, and the Company was also in compliance with all of its other covenants.
Line of Credit Facility, Amount Outstanding	$ 34.8	$ 48.5
Industrial Development Bond Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Date Description	The Company’s other debt obligations were primarily industrial development bonds and municipality-related loans as of September 30, 2018 and December 31, 2017, which includes a $5.0 million industrial development bond that matures in December 2018.
Industrial Development Revenue Bond	$ 5.0	$ 5.0

Equity and Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Beginning Balance	$ 422,677	$ 439,594	$ 408,864	$ 412,606
Net Income	19,771	11,704	51,928	31,659
Amounts reported in other comprehensive income (loss)	(6,019)	6,112	(15,346)	21,152
Dividends, Common Stock	(4,933)	(4,722)	(14,595)	(14,033)
Distributions to Noncontrolling Affiliate Shareholders	0	0	(834)	0
Share Issuance and Equity-Based Compensation Plans	1,140	(629)	2,619	675
Ending Balance	432,636	452,059	432,636	452,059
Common Stock [Member]
Beginning Balance	13,331	13,310	13,308	13,278
Net Income	0	0	0	0
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	0	0	0	0
Distributions to Noncontrolling Affiliate Shareholders	0	0	0	0
Share Issuance and Equity-Based Compensation Plans	3	(11)	26	21
Ending Balance	13,334	13,299	13,334	13,299
Additional Paid-in Capital [Member]
Beginning Balance	94,984	113,747	93,528	112,475
Net Income	0	0	0	0
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	0	0	0	0
Distributions to Noncontrolling Affiliate Shareholders	0	0	0	0
Share Issuance and Equity-Based Compensation Plans	1,137	(618)	2,593	654
Ending Balance	96,121	113,129	96,121	113,129
Retained Earnings [Member]
Beginning Balance	387,498	374,001	365,182	364,414
Net Income	19,690	11,142	51,668	30,040
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	(4,933)	(4,722)	(14,595)	(14,033)
Distributions to Noncontrolling Affiliate Shareholders	0	0	0	0
Share Issuance and Equity-Based Compensation Plans	0	0	0	0
Ending Balance	402,255	380,421	402,255	380,421
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(74,351)	(72,938)	(65,100)	(87,407)
Net Income	0	0	0	0
Amounts reported in other comprehensive income (loss)	(5,981)	6,265	(15,232)	20,734
Dividends, Common Stock	0	0	0	0
Distributions to Noncontrolling Affiliate Shareholders	0	0	0	0
Share Issuance and Equity-Based Compensation Plans	0	0	0	0
Ending Balance	(80,332)	(66,673)	(80,332)	(66,673)
Noncontrolling Interest [Member]
Beginning Balance	1,215	11,474	1,946	9,846
Net Income	81	562	260	1,619
Amounts reported in other comprehensive income (loss)	(38)	(153)	(114)	418
Dividends, Common Stock	0	0	0	0
Distributions to Noncontrolling Affiliate Shareholders	0	0	(834)	0
Share Issuance and Equity-Based Compensation Plans	0	0	0	0
Ending Balance	$ 1,258	$ 11,883	$ 1,258	$ 11,883

Equity and Noncontrolling Interest - Parentheticals (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stockholders Equity [Abstract]
Dividends Declared	$ 0.37	$ 0.355	$ 1.095	$ 1.055

Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	$ (74,351)	$ (72,938)	$ (65,100)	$ (87,407)
Other Comprehensive Income (Loss) Before Reclassifications	(6,448)	5,994	(17,498)	19,004
Amounts Reclassified from AOCI	687	530	2,758	3,395
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(5,761)	6,524	(14,740)	22,399
Related Tax Amounts	(220)	(259)	(492)	(1,665)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(5,981)	6,265	(15,232)	20,734
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(80,332)	(66,673)	(80,332)	(66,673)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(42,069)	(40,062)	(31,893)	(52,255)
Other Comprehensive Income (Loss) Before Reclassifications	(6,821)	5,917	(16,997)	18,110
Amounts Reclassified from AOCI	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(6,821)	5,917	(16,997)	18,110
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(6,821)	5,917	(16,997)	18,110
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(48,890)	(34,145)	(48,890)	(34,145)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(32,513)	(34,059)	(34,093)	(36,168)
Other Comprehensive Income (Loss) Before Reclassifications	99	(611)	563	(684)
Amounts Reclassified from AOCI	756	784	2,318	4,284
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	855	173	2,881	3,600
Related Tax Amounts	(177)	(111)	(623)	(1,429)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	678	62	2,258	2,171
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(31,835)	(33,997)	(31,835)	(33,997)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	231	1,183	886	1,016
Other Comprehensive Income (Loss) Before Reclassifications	274	688	(1,064)	1,578
Amounts Reclassified from AOCI	(69)	(254)	440	(889)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	205	434	(624)	689
Related Tax Amounts	(43)	(148)	131	(236)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	162	286	(493)	453
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	$ 393	$ 1,469	$ 393	$ 1,469

Equity and Noncontrolling Interest - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Cost of Goods Sold [Member]
Concentration Risk [Line Items]
Reclassification Percentage	25.00%	25.00%	25.00%	25.00%
Operating Expenses [Member]
Concentration Risk [Line Items]
Reclassification Percentage	75.00%	75.00%	75.00%	75.00%

Business Acquisitions - Narrative (Details) $ in Thousands, ₨ in Millions, $ in Millions	3 Months Ended							9 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2017 INR (₨)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 CAD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 CAD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Business Acquisition [Line Items]
Cash Paid for Acquisitions								$ 500	$ 5,363
Goodwill			$ 86,034					83,695
Other current liabilities			29,384					31,485
Mining North America [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions	$ 500
Other current liabilities								$ 500
Mining North America [Member] \| Trademarks Formulations and Product Technology [Member]
Business Acquisition [Line Items]
Intangibles	$ 1,000
Intangible Assets, Amortizable Life	10 years
Lubricor [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions						$ 16.0	$ 12,000
Metalworking North America [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions				$ 7.3	$ 5,400
India [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions		₨ 2,025.0	$ 31,800
Minority Interest Ownership Percentage			45.00%

Fair Value Measurements - Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	$ 1,649	$ 1,594
Assets, Fair Value Disclosure	1,649	1,594
Fair Value, Inputs, Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	0	0
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	1,649	1,594
Assets, Fair Value Disclosure	1,649	1,594
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	0	0
Assets, Fair Value Disclosure	$ 0	$ 0

Commitments and Contingencies (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Loss Contingency Accrual At Carrying Value	$ 0.2	$ 0.2
Loss Contingency, Settlement Agreement, Terms	The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation
ACP [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 1.0
ACP [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.1
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 1.9