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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2017	Jan. 31, 2018	Jun. 30, 2016
Document and Entity Information [Abstract]
Document Type	10-K
Document period end date	Dec. 31, 2017
Amendment flag	false
Document Fiscal Year Focus	2017
Document Period Focus	FY
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		13,306,968
Entity public float			$ 1,908,157,945
Trading Symbol	KWR

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 820,082	$ 746,665	$ 737,555
Cost of goods sold	528,587	466,555	459,810
Selling, general and administrative expenses	198,813	193,665	196,387
Restructuring and related activities	0	(439)	6,790
Combination-related expenses	29,938	1,531	0
Costs and Expenses, Total	757,338	661,312	662,987
Operating income	62,744	85,353	74,568
Other expense, net	(718)	(492)	(3,377)
Interest expense	(3,892)	(2,889)	(2,585)
Interest income	2,534	2,037	1,624
Income before taxes and equity in net income of associated companies	60,668	84,009	70,230
Taxes on income before equity in net income of associated companies	41,653	23,226	17,785
Income before equity in net income of associated companies	19,015	60,783	52,445
Equity in net income of associated companies	3,285	2,256	261
Net income	22,300	63,039	52,706
Net income attributable to noncontrolling interest	2,022	1,636	1,526
Net income attributable to Quaker Chemical Corporation	$ 20,278	$ 61,403	$ 51,180
Per share data:
Net income attributable to Quaker Chemical Corporation Common Shareholders - basic	$ 1.53	$ 4.64	$ 3.84
Net income attributable to Quaker Chemical Corporation Common Shareholders - diluted	$ 1.52	$ 4.63	$ 3.84

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Of Comprehensive Income [Abstract]
Net income	$ 22,300	$ 63,039	$ 52,706
Currency translation adjustments	21,076	(13,772)	(24,869)
Defined Benefit Plans [Abstract]
Net (loss) gain arising during the period, other	(96)	(2,990)	3,821
Amortization of actuarial loss	(2,255)	(2,155)	(2,561)
Amortization of prior service (gain) loss	(84)	(82)	(82)
Unrealized (loss) gain on available-for-sale securities	(130)	537	(978)
Other Comprehensive gain (loss)	23,021	(14,152)	(19,547)
Comprehensive Income	45,321	48,887	33,159
Less: comprehensive income attributable to noncontrolling interest	2,736	1,575	889
Comprehensive income attributable to Quaker Chemical Corporation	$ 42,585	$ 47,312	$ 32,270

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 89,879	$ 88,818
Accounts receivable, net	208,358	195,225
Inventories, net	87,221	77,082
Prepaid expenses and other current assets	21,128	15,343
Total current assets	406,586	376,468
Property, plant and equipment, net	86,704	85,734
Goodwill	86,034	80,804
Other intangible assets, net	71,603	73,071
Investments in associated companies	25,690	22,817
Non-current deferred tax assets	15,460	24,382
Other assets	30,049	28,752
Total assets	722,126	692,028
Current liabilities
Short-term borrowings and current portion of long-term debt	5,736	707
Accounts payable	93,008	77,583
Dividends payable	4,724	4,581
Accrued compensation	22,846	19,356
Accrued Restructuring	0	670
Other current liabilities	27,321	23,428
Total current liabilities	154,743	127,411
Long-term debt	61,068	65,769
Non-current deferred tax liabilities	9,653	12,008
Other non-current liabilities	51,496	35,886
Total liabilities	312,508	279,422
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock $1 par value; authorized 30,000,000 shares; issued and outstanding 2017 - 13,307,976 shares; 2016 - 13,277,832 shares	13,308	13,278
Capital in excess of par value	93,528	112,475
Retained earnings	365,936	364,414
Accumulated Other Comprehensive Loss	(65,100)	(87,407)
Total Quaker shareholders equity	407,672	402,760
Noncontrolling interest	1,946	9,846
Total equity	409,618	412,606
Total liabilities and equity	$ 722,126	$ 692,028

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
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	13,307,976	13,277,832

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 22,300	$ 63,039	$ 52,706
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	12,598	12,557	12,395
Amortization	7,368	7,009	6,811
Equity in undistributed earnings of associated companies, net of dividends	(2,895)	(1,969)	578
Deferred income taxes	(3,754)	(5,488)	2,401
Uncertain tax positions (non-deferred portion)	(817)	(3,206)	(1,122)
Non-current income taxes payable	15,825	0	0
Deferred compensation and other, net	1,074	(424)	14
Share-based compensation	4,190	6,349	5,919
Restructuring and related activities	0	(439)	6,790
Loss (gain) on disposal of property, plant and equipment and other assets	79	(18)	(12)
Insurance settlement realized	(762)	(1,023)	(760)
Combination related expenses, net of payements	4,952	503	0
Pension and other postretirement benefits contributions	(123)	(3,420)
Pension And Other Postretirement Benefit Expense			2,591
(Decrease) increase in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	(1,941)	(11,705)	(188)
Inventories	(6,135)	(1,870)	1,292
Prepaid expenses and other current assets	(2,932)	(703)	(721)
Accounts payable and accrued liabilities	12,381	14,063	(9,040)
Restructuring liabilities	(675)	(5,252)	(490)
Estimated taxes on income	(3,479)	(5,226)	(930)
Net cash provided by operating activities	64,762	73,753	73,432
Cash flows from investing activities
Investments in property, plant and equipment	(10,872)	(9,954)	(11,033)
Payments related to acquisitions, net of cash acquired	(5,363)	(15,024)	(24,058)
Proceeds from disposition of assets	1,577	186	135
Insurance settlement interest earned	50	32	35
Change in restricted cash, net	712	991	725
Net cash used in investing activities	(13,896)	(23,769)	(34,196)
Cash flows from financing activities
Proceeds from long-term debt	0	0	6,163
Repayment of long-term debt	(2,853)	(14,513)	(477)
Dividends paid	(18,613)	(17,625)	(16,513)
Stock options exercised, other	(1,956)	(811)	1,048
Payments for repurchase of common stock	0	(5,859)	(7,276)
Excess tax benefit from stock option exercises	0	678	384
Purchase of noncontrolling interest in affiliates, net	(31,787)	0	0
Payment of acquisition-related liabilities		0	(226)
Distributions to noncontrolling affiliate shareholders	0	0	0
Net cash used in financing activities	(55,209)	(38,130)	(16,897)
Effect of exchange rate changes on cash	5,404	(4,089)	(6,017)
Net increase (decrease) in cash and cash equivalents	1,061	7,765	16,322
Cash and cash equivalents at beginning of period	88,818	81,053	64,731
Cash and cash equivalents at end of period	89,879	88,818	81,053
Supplemental Cash Flow Information [Abstract]
Income Taxes Paid	21,544	25,043	20,996
Interest Paid	2,767	2,481	2,223
Other Noncash Investing And Financing Items [Abstract]
Change in accrued purchases of property, plant and equipment, net	$ 240	$ 363	$ 209

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance at at Dec. 31, 2014	$ 365,135	$ 13,301	$ 99,056	$ 299,524	$ (54,406)	$ 7,660
Net income	52,706	0	0	51,180	0	1,526
Amounts reported in other comprehensive income (loss)	(19,547)	0	0	0	(18,910)	(637)
Repurchases of common stock	(7,276)	(87)	0	(7,189)	0	0
Dividends common stock	(16,775)	0	0	(16,775)	0	0
Acqusition of noncontrolling interest	0	0	0	0	0	0
Disposition of noncontrolling interest	(351)	0	0	0	0	(351)
Shares issued upon exercise of stock options and other	619	17	602	0	0	0
Shares issued for employee stock purchase plan	429	6	423	0	0	0
Equity based compensation plans	5,919	51	5,868	0	0	0
Excess tax benefit from stock option exercises	384	0	384	0	0	0
Balance at at Dec. 31, 2015	381,243	13,288	106,333	326,740	(73,316)	8,198
Net income	63,039	0	0	61,403	0	1,636
Amounts reported in other comprehensive income (loss)	(14,152)	0	0	0	(14,091)	(61)
Repurchases of common stock	(5,859)	(84)	0	(5,775)	0	0
Dividends common stock	(17,954)	0	0	(17,954)	0	0
Acquisition of noncontrolling interest	73	0	0	0	0	73
Disposition of noncontrolling interest	0	0	0	0	0	0
Shares issued upon exercise of stock options and other	(1,302)	11	(1,313)	0	0	0
Shares issued for employee stock purchase plan	491	6	485	0	0	0
Equity based compensation plans	6,349	57	6,292	0	0	0
Excess tax benefit from stock option exercises	678	0	678	0	0	0
Balance at at Dec. 31, 2016	412,606	13,278	112,475	364,414	(87,407)	9,846
Net income	22,300	0	0	20,278	0	2,022
Amounts reported in other comprehensive income (loss)	23,021	0	0	0	22,307	714
Repurchases of common stock	0	0	0	0	0	0
Dividends common stock	(18,756)	0	0	(18,756)	0	0
Acqusition of noncontrolling interest	(31,787)	0	(21,151)	0	0	(10,636)
Disposition of noncontrolling interest	0	0	0	0	0	0
Shares issued upon exercise of stock options and other	(2,451)	5	(2,456)	0	0	0
Shares issued for employee stock purchase plan	495	4	491	0	0	0
Equity based compensation plans	4,190	21	4,169	0	0	0
Excess tax benefit from stock option exercises	0	0	0	0	0	0
Balance at at Dec. 31, 2017	$ 409,618	$ 13,308	$ 93,528	$ 365,936	$ (65,100)	$ 1,946

Consolidated Statements of Changes in Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statement Of Changes In Equity Parentheticals [Abstract]
Dividends declared	$ 1.41	$ 1.355	$ 1.26

Significant Accounting Policies

12 Months Ended

Dec. 31, 2017

Significant Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Note 1 – Significant Accounting Policies

Principles of consolidation: All majority-owned subsidiaries are included in the Company’s consolidated financial statements, with appropriate elimination of intercompany balances and transactions. Investments in associated companies (less than majority-owned and in which the Company has significant influence) are accounted for under the equity method. The Company’s share of net income or losses in these investments in associated companies is included in the Consolidated Statements of Income. The Company periodically reviews these investments for impairments and, if necessary, would adjust these investments to their fair value when a decline in market value or other impairment indicators are deemed to be other than temporary. See Note 14 of Notes to Consolidated Financial Statements. The Company is not the primary beneficiary of any variable interest entities (“VIEs”) and therefore the Company’s consolidated financial statements do not include the accounts of any VIEs.

Translation of foreign currency: Assets and liabilities of non-U.S. subsidiaries and associated companies are translated into U.S. dollars at the respective rates of exchange prevailing at the end of the year. Income and expense accounts are translated at average exchange rates prevailing during the year. Translation adjustments resulting from this process are recorded directly in equity as accumulated other comprehensive (loss) income (“AOCI”) and will be included as income or expense only upon sale or liquidation of the underlying investment. Generally, all of the Company’s non-U.S. subsidiaries use their local currency as their functional currency.

Cash and cash equivalents: The Company invests temporary and excess funds in money market securities and financial instruments having maturities typically within 90 days. The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company has not experienced losses from the aforementioned investments.

Inventories: Inventories are valued at the lower of cost or net realizable value, and are valued using the first-in, first-out method. See Note 11 of Notes to Consolidated Financial Statements.

Long-lived assets: Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method on an individual asset basis over the following estimated useful lives: buildings and improvements, 10 to 45 years; and machinery and equipment, 1 to 15 years. The carrying values of long-lived assets are evaluated whenever changes in circumstances or current events indicate the carrying amount of such assets may not be recoverable. An estimate of undiscounted cash flows produced by the asset, or the appropriate group of assets, is compared with the carrying value to determine whether an impairment exists. If necessary, the Company recognizes an impairment loss for the difference between the carrying amount of the assets and their estimated fair value. Fair value is based on current and anticipated future cash flows. Upon sale or other dispositions of long-lived assets, the applicable amounts of asset cost and accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposals, is recorded in the Consolidated Statements of Income. Expenditures for renewals or improvements that increase the estimated useful life or capacity of the assets are capitalized, whereas expenditures for repairs and maintenance are expensed when incurred. See Note 12 of Notes to Consolidated Financial Statements.

Capitalized software: The Company capitalizes certain costs in connection with developing or obtaining software for internal use, depending on the associated project. These costs are amortized over a period of 3 to 5 years once the assets are ready for their intended use. In connection with the implementations and upgrades to the Company’s global transaction, consolidation and other related systems, approximately $1.3 million and $1.4 million of net costs were capitalized in property, plant and equipment on the Company’s December 31, 2017 and 2016 Consolidated Balance Sheets, respectively.

Goodwill and other intangible assets: The Company records goodwill, definite-lived intangible assets and indefinite-lived intangible assets at fair value at the date of acquisition. Goodwill and indefinite-lived intangible assets are not amortized, but tested for impairment at least annually. These tests will be performed more frequently if triggering events indicate potential impairment. Definite-lived intangible assets are amortized over their estimated useful lives, generally for periods ranging from 4 to 20 years. The Company continually evaluates the reasonableness of the useful lives of these assets, consistent with the discussion of long-lived assets, above. See Note 13 of Notes to Consolidated Financial Statements.

Revenue recognition: The Company currently recognizes revenue in accordance with the terms of the underlying agreements, when title and risk of loss have been transferred, when collectability is reasonably assured, and when pricing is fixed or determinable. For the Company, this generally occurs when products are shipped or delivered to customers or, for consignment-type arrangements, upon usage by the customer and when services are performed. License fees and royalties are included in other income when recognized in accordance with their agreed-upon terms, when performance obligations are satisfied, when the amount is fixed or determinable, and when collectability is reasonably assured.

During the first quarter of 2018, the Company will adopt the provisions of the Financial Accounting Standards Board’s (“FASB’s”) new revenue recognition guidance, which will require the Company to recognize revenue to depict the transfer of

promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. To do this, the Company will apply 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. See Note 3 of Notes to Consolidated Financial Statements.

As part of the Company’s chemical management services, 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, such revenue is recorded using net reporting as service revenue at the amount of the administrative fee earned by the Company for ordering the goods. Third-party products transferred under arrangements resulting in net reporting totaled $44.5 million, $43.5 million and $48.6 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Accounts receivable and allowance for doubtful accounts: Trade accounts receivable subject the Company to credit risk. Trade accounts receivable are recorded at the invoiced amount and generally do not bear interest. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses with its existing accounts receivable. Reserves for customers filing for bankruptcy protection are generally established at 75-100% of the amount outstanding at the bankruptcy filing date. However, initially establishing a reserve and the amount thereto is dependent on the Company’s evaluation of likely proceeds to be received from the bankruptcy process, which could result in the Company recognizing minimal or no reserve at the date of bankruptcy. Large and/or financially distressed customers are generally reserved for on a specific review basis while a general reserve is established for other customers based on historical experience. The Company performs a formal review of its allowance for doubtful accounts quarterly. Account balances are charged off against the allowance when the Company deems it is probable the receivable will not be recovered. The Company does not have any off-balance-sheet credit exposure related to its customers. During the year ended December 31, 2017, the Company’s five largest customers accounted for approximately 18% of its consolidated net sales with the largest customer accounting for approximately 8% of the Company’s consolidated net sales. See Note 10 of Notes to Consolidated Financial Statements.

Research and development costs: Research and development costs are expensed as incurred and are included in selling, general and administrative expenses (“SG&A”). Research and development expenses were $23.9 million, $22.5 million and $22.1 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Environmental liabilities and expenditures: Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. If there is a range of estimated liability and no amount in that range is considered more probable than another, then the Company records the lowest amount in the range in accordance with generally accepted accounting principles. Accrued liabilities are exclusive of claims against third parties and are not discounted. Environmental costs and remediation costs are capitalized if the costs extend the life, increase the capacity or improve safety or efficiency of the property from the date acquired or constructed, and/or mitigate or prevent contamination in the future. See Note 23 of Notes to Consolidated Financial Statements.

Asset retirement obligations: The Company follows the FASB’s guidance regarding asset retirement obligations, which addresses the accounting and reporting for obligations associated with the retirement of tangible long-lived assets and the associated retirement costs. Also, the Company follows the FASB’s guidance for conditional asset retirement obligations (“CARO”), which relates to legal obligations to perform an asset retirement activity in which the timing and (or) method of settlement are conditional on a future event that may or may not be within the control of the entity. In accordance with this guidance, the Company records a liability when there is enough information regarding the timing of the CARO to perform a probability-weighted discounted cash flow analysis. As of December 31, 2017 and 2016, the Company had limited exposure to such obligations and had immaterial liabilities recorded for such on its Consolidated Balance Sheets.

Pension and other postretirement benefits: The Company maintains various noncontributory retirement plans, the largest of which is in the U.S., covering a portion of its employees in the U.S. and certain other countries. The plans of the Company’s subsidiaries in the Netherlands, the United Kingdom, Mexico and Sweden are subject to the provisions of FASB’s guidance regarding employers’ accounting for defined benefit pension plans. The plans of the remaining non-U.S. subsidiaries are, for the most part, either fully insured or integrated with the local governments’ plans and are not subject to the provisions of the guidance. The guidance requires that employers recognize on a prospective basis the funded status of their defined benefit pension and other postretirement plans on their consolidated balance sheet and, also, recognize as a component of other comprehensive income, net of tax, the gains or losses and prior service costs or credits that arise during the period but are not recognized as components of net periodic benefit cost. The Company’s U.S. pension plan year ends on November 30 and the measurement date is December 31. The measurement date for the Company’s other postretirement benefits plan is December 31.

The Company’s global pension investment policies are designed to ensure that pension assets are invested in a manner consistent with meeting the future benefit obligations of the pension plans and maintaining compliance with various laws and regulations including the Employee Retirement Income Security Act of 1974. The Company establishes strategic asset allocation percentage targets and appropriate benchmarks for significant asset classes with the aim of achieving a prudent balance between return and risk. The Company’s investment horizon is generally long term, and, accordingly, the target asset allocations encompass a long-term perspective of capital markets, expected risk and return and perceived future economic conditions while also considering the profile of plan liabilities. To the extent feasible, the short-term investment portfolio is managed to immunize the short-term obligations, the intermediate portfolio duration is immunized to reduce the risk of volatility in intermediate plan distributions, and the total return portfolio is expected to maximize the long-term real growth of plan assets. The critical investment principles of diversification, assessment of risk and targeting the optimal expected returns for given levels of risk are applied. The Company’s investment guidelines prohibit use of securities such as letter stock and other unregistered securities, commodities or commodity contracts, short sales, margin transactions, private placements (unless specifically addressed by addendum), or any derivatives, options or futures for the purpose of portfolio leveraging.

The target asset allocation is reviewed periodically and is determined based on a long-term projection of capital market outcomes, inflation rates, fixed income yields, returns, volatilities and correlation relationships. The interaction between plan assets and benefit obligations is periodically studied to assist in establishing such strategic asset allocation targets. Asset performance is monitored with an overall expectation that plan assets will meet or exceed benchmark performance over rolling five-year periods. The Company’s pension committee, as authorized by the Company’s Board of Directors, has discretion to manage the assets within established asset allocation ranges approved by senior management of the Company. As of December 31, 2017, the plan’s investments were in compliance with all approved ranges of asset allocations. See Note 18 of Notes to Consolidated Financial Statements.

Comprehensive income (loss): The Company presents other comprehensive income (loss) in its Statements of Comprehensive Income. The Company follows the FASB’s guidance regarding the disclosure of reclassifications from AOCI which requires the disclosure of significant amounts reclassified from each component of AOCI, the related tax amounts and the income statement line items affected by such reclassifications. See Note 20 of Notes to Consolidated Financial Statements.

Income taxes and uncertain tax positions: The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, deferred taxes represent the future tax consequences expected to occur when the reported amounts of assets and liabilities are recovered or paid. The provision for income taxes represents income taxes paid or payable for the current year and the change in deferred taxes during the year. Deferred taxes result from differences between the financial and tax bases of the Company’s assets and liabilities and are adjusted for changes in tax rates and tax laws when changes are enacted. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be realized. The FASB’s guidance regarding accounting for uncertainty in income taxes prescribes the recognition threshold and measurement attributes for financial statement recognition and measurement of tax positions taken or expected to be taken on a tax return. The guidance further requires the determination of whether the benefits of tax positions will be more likely than not sustained upon audit based upon the technical merits of the tax position. For tax positions that are determined to be more likely than not sustained upon audit, a company recognizes the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not determined to be more likely than not sustained upon audit, a company does not recognize any portion of the benefit in the financial statements. Additionally, the Company monitors and adjusts for derecognition, classification, and penalties and interest in interim periods, with appropriate disclosure and transition thereto. Also, the amount of interest expense and income related to uncertain tax positions is computed by applying the applicable statutory rate of interest to the difference between the tax position recognized, including timing differences, and the amount previously taken or expected to be taken in a tax return. The Company’s continuing practice is to recognize interest and/or penalties related to income tax matters in income tax expense. Finally, when applicable, the Company nets its liability for unrecognized tax benefits against deferred tax assets related to net operating losses or other tax credit carryforwards that would apply if the uncertain tax position were settled for the presumed amount at the balance sheet date. See Note 8 of Notes to Consolidated Financial Statements.

Derivatives: The Company is exposed to the impact of changes in interest rates, foreign currency fluctuations, changes in commodity prices and credit risk. The Company is currently not using derivative instruments to mitigate the risks associated with foreign currency fluctuations, changes in commodity prices or credit risk, but has used derivative financial instruments primarily for purposes of hedging exposures to fluctuations in interest rates in the past. If used in the future, the Company will recognize the entire change in the fair value of the hedging instrument in the same income statement line as the hedged item. The Company currently uses no derivative instruments designated as hedges and, also, has not entered into derivative contracts for trading or speculative purposes.

Fair value measurements: The Company utilizes the FASB’s guidance regarding fair value measurements, which establishes a common definition for fair value to be applied to guidance requiring use of fair value, establishes a framework for measuring fair value and expands disclosure about such fair value measurements. Specifically, the guidance utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. See Notes 18 and 22 of Notes to Consolidated Financial Statements. The following is a brief description of those three levels:

	•	Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.
	•	Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.
	•	Level 3: Unobservable inputs that reflect the reporting entity's own assumptions.

Share-based compensation: The Company applies the FASB’s guidance regarding share-based payments, which requires the recognition of the fair value of share-based compensation as a component of expense. The Company has a long-term incentive program (“LTIP”) for key employees which provides for the granting of options to purchase stock at prices not less than its market value on the date of the grant. Most options become exercisable between one and three years after the date of the grant for a period of time determined by the Company, but not to exceed seven years from the date of grant. Restricted stock awards and restricted stock units (“RSU”) issued under the LTIP program are generally subject to time vesting over a one to five-year period. In addition, as part of the Company’s Global Annual Incentive Plan (“GAIP”), nonvested shares may be issued to key employees, which generally vest over a two to five-year period. In addition, while the FASB’s guidance permits the Company to make an accounting policy election to account for forfeitures as they occur for service condition aspects of certain share-based awards, the Company has decided not to elect this accounting policy and instead has elected to continue utilizing a forfeiture rate assumption. Based on historical experience, the Company has assumed a forfeiture rate of 13% on certain of its nonvested stock awards. The Company will record additional expense if the actual forfeiture rate is lower than estimated, and will record a recovery of prior expense if the actual forfeiture is higher than estimated. See Note 6 of Notes to Consolidated Financial Statements.

Earnings per share: The Company follows the FASB’s guidance regarding the calculation of earnings per share for nonvested stock awards with rights to non-forfeitable dividends. The guidance requires nonvested stock awards with rights to non-forfeitable dividends to be included as part of the basic weighted average share calculation under the two-class method. See Note 9 of Notes to Consolidated Financial Statements.

Segments: The Company’s reporting segments are the same as the Company’s operating segments. The Company’s reportable operating segments reflect the structure of the Company’s internal organization, the method by which the Company’s resources are allocated and the manner by which the Company assesses its performance. The Company’s reportable operating segments are organized by geography as follows: (i) North America, (ii) Europe, Middle East and Africa (“EMEA”), (iii) Asia/Pacific and (iv) South America. See Note 4 of Notes to Consolidated Financial Statements.

Business combinations: The Company accounts for business combinations under the acquisition method of accounting. This method requires the recording of acquired assets, including separately identifiable intangible assets and assumed liabilities at their respective acquisition date estimated fair values. Any excess of the purchase price over the estimated fair value of the identifiable net assets acquired is recorded as goodwill. The determination of the estimated fair value of assets acquired and liabilities assumed requires significant estimates and assumptions. Based on the assessment of additional information during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the estimated fair value of assets acquired and liabilities assumed. See Note 21 of Notes to Consolidated Financial Statements.

Restructuring activities: Restructuring programs consist of employee severance, rationalization of manufacturing or other facilities and other related items. To account for such programs, the Company applies FASB’s guidance regarding exit or disposal cost obligations. This guidance requires that a liability for a cost associated with an exit or disposal activity be recognized when the liability is incurred, is estimable, and payment is probable. See Note 5 of Notes to Consolidated Financial Statements.

Reclassifications: Certain information has been reclassified to conform to the current year presentation. During the first quarter of 2017, the Company early adopted an accounting standard update regarding the classification of pension costs. The guidance in this accounting standard update was required to be applied retrospectively, which resulted in a reclassification to the Company’s Consolidated Statements of Income for the years ended December 31, 2016 and 2015, respectively. See Note 3 of Notes to Consolidated Financial Statements. In addition, the Company has made certain reclassifications to prior year disclosures regarding combination-related items to conform with the current period presentation. See Note 2 of Notes to Consolidated Financial Statements.

Accounting estimates: The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosure of contingencies at the date of the financial statements and the reported amounts of net sales and expenses during the reporting period. Actual results could differ from such estimates.

Houghton Combination	12 Months Ended
Houghton Combination	Dec. 31, 2017
Business Combination Separately Recognized Transactions [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. The New Credit Facility includes a $400.0 million multicurrency revolver, a $575.0 million USD term loan and a $175.0 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 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 incurs certain interest costs paid to maintain the banks’ committed capital (“ticking fees”), which began to accrue on September 29, 2017 and bear an interest rate of 0.30% per annum. In addition, the issuance of the Company’s shares at closing of the Combination was subject to approval by Quaker’s shareholders under the rules of the New York Stock Exchange. This approval was received at a meeting of the Company’s shareholders during the third quarter of 2017. Also, the Combination is subject to regulatory approval in the United States, Europe, China and Australia. The Company received regulatory approval from China in July 2017 and from Australia in October 2017. Depending on the remaining regulatory approvals and other customary terms and conditions set forth in the share purchase agreement, the Company currently estimates closing of the Combination to occur during the first half of 2018. The Company incurred costs of $30.8 million during the year ended December 31, 2017 for certain legal, environmental, financial, and other advisory and consultant costs related to due diligence, regulatory and shareholder approvals, integration planning associated with the Combination and ticking fees. The Company incurred $1.5 million during the year ended December 31, 2016 for certain legal, environmental, financial, and other advisory and consultant costs related to due diligence. There were no similar costs incurred during the year ended December 31, 2015. As of December 31, 2017 and 2016, the Company had current liabilities related to the Combination of $5.5 million and $0.5 million, respectively, primarily recorded within other current liabilities on its Consolidated Balance Sheets. In addition, the Company has made certain reclassifications to prior year disclosures regarding combination-related items to conform with the current period presentation.

Recently Issued Accounting Standards	12 Months Ended
Recently Issued Accounting Standards	Dec. 31, 2017
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 FASB issued an accounting standard update in August 2017 to increase transparency of the economics related to risk management activities within the financial statements and enhance transparency and understandability of hedge results. This accounting standard update eliminates the requirement to separately measure and report hedge ineffectiveness and requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2018. All transition requirements and elections should be applied to hedging relationships existing on the date of adoption. For cash flow and net investment hedges existing at the date of adoption, the Company should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to AOCI with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that the Company adopts. The amended presentation and disclosure guidance is required only prospectively. Early adoption is permitted including adoption in any interim period for which financial statements have not been issued or made available for issuance. The Company has elected to early adopt the guidance in this accounting standard update during the fourth quarter of 2017, with no impact to its financial statements. The Company does not currently use any derivative instruments designated as hedges, but may choose to in the future. The FASB issued an accounting standard update in May 2017 to clarify when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. This accounting standard update will reduce diversity in practice and result in fewer changes to the terms of an award being accounted for as modifications. This accounting standard update will allow companies to make certain changes to awards without accounting for them as modifications and an entity is not required to estimate the value of the award immediately before and after the change if the change doesn’t affect any of the inputs to the model used to value the award. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2017. The guidance within this accounting standard update should be applied prospectively to awards modified on or after the adoption date. Early adoption is permitted including adoption in any interim period for which financial statements have not been issued or made available for issuance. During the second quarter of 2017, the Company elected to early adopt this guidance with no impact to its financial statements. The FASB issued an accounting standard update in March 2017 to improve the presentation of net periodic pension and postretirement benefit cost. Defined benefit pension and postretirement benefit costs (“net benefit cost”) comprise several components that reflect different aspects of an employer’s financial arrangements as well as the cost of benefits provided to employees. This accounting standard update requires that an employer disaggregate the service cost component from the other components of net benefit cost, provides explicit guidance on how to present the service cost component and the other components of net benefit cost in the income statement and allows only the service cost component of net benefit cost to be eligible for capitalization. The guidance within this accounting standard update should be applied retrospectively for the presentation of the service cost component and the other components of net periodic benefit cost in the income statement and prospectively for the capitalization of the service cost component of net periodic benefit in assets. This accounting standard update is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Early adoption is permitted as of the beginning of an annual period for which financial statements (interim or annual) have not been issued or made available for issuance. During the first quarter of 2017, the Company elected to early adopt the guidance within this accounting standard update, including the use of a practical expedient which allows the Company to use amounts previously disclosed in its pension and other postretirement benefits note for the prior period as the estimation basis for applying the required retrospective presentation. Adoption of this guidance resulted in a reclassification to the Company’s Consolidated Statements of Income for the years ended December 31, 2016 and 2015, as previously reported cost of goods sold (“COGS”) were reduced by $0.5 and $0.7 million, respectively, and SG&A were reduced by $1.8 million and $2.6 million, respectively, with a corresponding increase to other expense, net, of $2.3 million and $3.3 million, respectively. In addition, these required retrospective reclassifications resulted in an immaterial adjustment to previously reported direct operating earnings within the Company’s reportable operating segment disclosures for the years ended December 31, 2016 and 2015, respectively, as well as reclassifications to the Company’s quarterly results for the year ended December 31, 2016. See Note 4, Note 7, Note 18 and Note 24 of Notes to Consolidated Financial Statements. The FASB issued an accounting standard update in January 2017 simplifying the test for goodwill impairment by eliminating the Step 2 computation. The accounting standard update modifies the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. The guidance removes the requirement to determine a goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. The guidance within this accounting standard update should be applied on a prospective basis, and is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. During the third quarter of 2017, in connection with the Company’s 2017 annual goodwill impairment test, the Company elected to early adopt this guidance with no impact to its financial statements. 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 provide 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 is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted in limited circumstances, and the amendments in this accounting standard update should be applied prospectively, with no disclosures required at transition. The Company does not currently meet the criteria for early application of the amendments and therefore has not early adopted the guidance. The Company will evaluate the potential impact of this guidance on future transactions, as applicable. 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 will require 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 is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted and the guidance requires application using a retrospective transition method to each period presented when adopted. While permitted, the Company has not early adopted the guidance and is currently evaluating the appropriate implementation strategy. Adoption of the guidance will not have an impact on the Company’s earnings or balance sheet but will result in changes to certain disclosures within the statement of cash flows, notably cash flows from investing activities. 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 is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. While permitted, the Company has not early adopted the guidance and is currently evaluating the appropriate implementation strategy. Adoption of the guidance will not have an impact on the Company’s earnings or balance sheet but may result in certain reclassifications on the statement of cash flows, including reclassifications between cash flows from operating activities, investing activities and financing activities, respectively. The FASB issued an accounting standard update in March 2016 involving several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, use of a forfeiture rate, and classification on the statement of cash flows. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2016. When adopted, application of the guidance will vary based on each aspect of the update, including adoption under retrospective, modified retrospective or prospective approaches. Early adoption was permitted. During the first quarter of 2017, the Company adopted the guidance within the accounting standard update as required. The impact of adoption for the Company included the elimination of recording the tax effects of deductions in excess of compensation cost through equity as the guidance in this accounting standard update requires all tax effects related to share-based payments to now be recorded through the income statement. The tax effects of awards are required to be treated as discrete items in the interim reporting period in which the share-based compensation-related tax benefits occur. In addition, when applying the treasury stock method for computing diluted earnings per share, there are no longer assumed proceeds from the share-based compensation-related tax benefits and as a result, there are fewer shares considered to be repurchased in the calculation. This results in an assumption of more incremental shares being issued upon the exercise of share-based payment awards; therefore, equity awards will have a more dilutive effect on earnings per share. As required, the Company has applied these changes in the guidance prospectively, beginning in the first quarter of 2017. The result of these changes was a tax benefit of $1.4 million recorded during the year ended December 31, 2017 and an immaterial number of dilutive shares added to the Company’s earnings per share calculation for the year ended December 31, 2017. In addition, all tax-related cash flows resulting from share-based payments are now required to be reported as operating activities in the statement of cash flows under this new guidance. Either prospective or retrospective transition of this provision was permitted, and the Company has elected to apply the cash flow classification guidance on a prospective basis, consistent with the prospective transition for the treatment of excess tax benefits in the income statement. Lastly, the accounting standard update permitted Companies to make an accounting policy election to account for forfeitures as they occur for service condition aspects of certain share-based awards, rather than estimating forfeitures each period. While permitted, the Company has decided not to elect this accounting policy change, and instead has elected to continue utilizing a forfeiture rate assumption. Based on historical experience, the Company has assumed a forfeiture rate of 13% on certain of its nonvested stock awards. See Note 6, Note 8 and Note 9 of Notes to Consolidated Financial Statements. The FASB issued an accounting standard update in February 2016 regarding the accounting and disclosure for leases. Specifically, the update will require entities that lease assets to recognize the assets and liabilities for the rights and obligations created by those leases on the balance sheet, in most instances. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2018, and should be applied on a modified retrospective basis for the reporting periods presented. Early adoption is permitted. The Company has not early adopted and is currently evaluating the potential impact of this guidance and an appropriate implementation strategy. The Company has begun its impact assessment, including taking an inventory of its outstanding leases globally. While the Company’s evaluation of this guidance is in the early stages, the Company currently expects adoption of this guidance to have an impact on its balance sheet. 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 are 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. During 2016, 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. As of December 31, 2017, the Company has completed its impact assessment for the implementation of the new revenue recognition guidance. This 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 expects to adopt the guidance in the first quarter of 2018, as required, using a modified retrospective adoption approach applied to those contracts which will not be completed as of December 31, 2017. In addition, the Company will elect to apply certain of the permitted practical expedients within the revenue recognition guidance, including practical expedients around significant financing components, sales taxes and shipping and handling activities. Based on information reviewed to date and the impact assessment conclusions reached so far, the Company does not expect the adoption of this revenue recognition guidance to have a material impact on its reported earnings, cash flows, or balance sheet; however, the Company does expect the adoption to increase the amount and level of disclosures concerning the Company’s net sales. In addition, the Company has begun preliminary considerations for how the new revenue recognition guidance may impact Houghton, as it pertains to the potential Combination.

Business Segments

12 Months Ended

Dec. 31, 2017

Segment Disclosures [Abstract]

Segment Reporting Disclosure [Text Block]

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 COGS and 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, net.

The following tables present information about the performance of the Company’s reportable operating segments for the years ended December 31, 2017, 2016 and 2015:

		2017		2016		2015
Net sales
	North America	$	356,598	$	336,174	$	344,248
	EMEA		226,243		200,917		179,717
	Asia/Pacific		201,008		179,131		181,056
	South America		36,233		30,443		32,534
Total net sales		$	820,082	$	746,665	$	737,555

		2017		2016		2015
Operating earnings, excluding indirect operating expenses
	North America	$	77,694	$	77,833	$	80,239
	EMEA		35,350		33,810		28,236
	Asia/Pacific		48,342		45,866		45,107
	South America		3,927		1,386		1,785
Total operating earnings, excluding indirect operating expenses			165,313		158,895		155,367
Non-operating charges			(65,142)		(65,316)		(66,999)
Restructuring and related activities			—		439		(6,790)
Combination-related expenses			(29,938)		(1,531)		—
Depreciation of corporate assets and amortization			(7,489)		(7,134)		(7,010)
Operating income			62,744		85,353		74,568
Other expense, net			(718)		(492)		(3,377)
Interest expense			(3,892)		(2,889)		(2,585)
Interest income			2,534		2,037		1,624
Income before taxes and equity in net income of
	associated companies	$	60,668	$	84,009	$	70,230

The following tables present information regarding the Company’s reportable segments’ assets and long-lived assets as of December 31, 2017, 2016 and 2015:

		2017		2016		2015
Segment assets
	North America (including Corporate)	$	324,260	$	321,404	$	317,082
	EMEA		177,267		147,021		162,647
	Asia/Pacific		196,891		200,218		181,389
	South America		23,708		23,385		19,609
	Total segment assets	$	722,126	$	692,028	$	680,727

		2017		2016		2015
Segment long-lived assets
	North America (including Corporate)	$	88,818	$	86,775	$	87,421
	EMEA		28,507		25,630		27,101
	Asia/Pacific		22,427		22,040		23,096
	South America		2,691		2,858		2,573
	Total segment long-lived assets	$	142,443	$	137,303	$	140,191

The following tables present information regarding the Company’s reportable segments’ capital expenditures and depreciation for the years ended December 31, 2017, 2016 and 2015:

		2017		2016		2015
Capital expenditures
	North America (including Corporate)	$	3,919	$	2,918	$	4,166
	EMEA		3,936		3,263		3,081
	Asia/Pacific		2,458		3,269		3,169
	South America		559		504		617
	Total segment capital expenditures	$	10,872	$	9,954	$	11,033

		2017		2016		2015
Depreciation
	North America	$	5,791	$	5,672	$	5,577
	EMEA		3,368		3,323		2,975
	Asia/Pacific		2,669		2,765		2,812
	South America		649		672		832
	Total segment depreciation	$	12,477	$	12,432	$	12,196

The following table presents information regarding the Company’s product lines that represent more than 10% of consolidated revenues for the years ended December 31, 2017, 2016 and 2015, with the remaining product sales being immaterial to present:

	2017		2016		2015
Rolling lubricants	17.8	%	19.0	%	18.6	%
Machining and grinding compounds	15.8	%	14.9	%	15.3	%
Hydraulic fluids	11.6	%	12.0	%	12.6	%
Corrosion preventives	11.4	%	11.8	%	12.0	%
Specialty greases	10.0	%	10.1	%	8.5	%

During the years ended December 31, 2017, 2016 and 2015, the North America segment had approximately $49.2 million, $35.8 million and $34.0 million of net sales, respectively, which were attributable to non-domestic operations. As of December 31, 2017, 2016 and 2015, the North America segment had approximately $4.9 million, $4.9 million and $2.7 million of long-lived assets, respectively, which were attributable to non-domestic operations.

Inter-segment revenue for the years ended December 31, 2017, 2016 and 2015 was $9.4 million, $8.3 million and $9.1 million for North America, $22.0 million, $18.1 million and $17.8 million for EMEA, $0.4 million, $0.7 million and $1.0 million for Asia/Pacific and less than $0.1 million for the years ended December 31, 2017, 2016 and 2015 for South America, respectively. However, all inter-segment transactions have been eliminated from each reportable operating segment’s net sales and earnings for all periods presented in the above tables.

Restructuring and Related Activities

12 Months Ended

Dec. 31, 2017

Restructuring And Related Activities [Abstract]

Restructuring And Related Activities Disclosure [Text Block]

Note 5 – Restructuring and Related Activities

In response to weak economic conditions and market declines in many regions, Quaker’s management approved a global restructuring plan (the “2015 Program”) in the fourth quarter of 2015 to reduce its operating costs. The 2015 Program included the re-organization of certain commercial functions, the consolidation of certain distribution, laboratory and administrative offices, and other related severance charges. In addition to these actions, during the fourth quarter of 2015 the Company made a decision to make available-for-sale certain technology of one of its existing businesses, which also resulted in employee severance and $0.3 million of intangible assets being reclassified to other current assets as of December 31, 2015. During the fourth quarter of 2016, the Company made a decision to no longer market or make available-for-sale this technology, which resulted in $0.3 million of other current assets being reclassified back to intangible assets as of December 31, 2016.

The 2015 Program included provisions for the reduction of total headcount by approximately 65 employees globally. As a result of this program, the Company recognized a $6.8 million restructuring charge in the fourth quarter of 2015. Employee separation costs varied depending on local regulations within certain foreign countries and included severance and other benefits. The Company substantially completed all of the initiatives under the 2015 Program in 2016 and settlement of these charges occurred primarily in 2016 as well. During the fourth quarter of 2016, the Company recognized a restructuring credit of $0.4 million in connection with the 2015 Program, due to customary and routine adjustments to initial estimates for employee separation costs, as well as the reversal of certain accrued employee separation costs as a result of the change in available-for-sale technology, noted above. 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 in each reportable operating segment in connection with the 2015 Program during the years ended December 31, 2017, 2016 and 2015 is as follows:

		North						South
		America		EMEA		Asia/Pacific		America		Total
Accrued restructuring as of
December 31, 2014		$	—	$	—	$	—	$	—	$	—
	Restructuring charges		2,025		4,390		338		37		6,790
	Cash payments		(158)		(130)		(202)		—		(490)
	Currency translation adjustments		—		5		(1)		(1)		3
Accrued restructuring as of
December 31, 2015			1,867		4,265		135		36		6,303
	Restructuring credits		—		(439)		—		—		(439)
	Cash payments		(1,671)		(3,404)		(138)		(39)		(5,252)
	Currency translation adjustments		—		52		3		3		58
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
December 31, 2017		$	—	$	—	$	—	$	—	$	—

Share-Based Compensation

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Note 6 – Share-Based Compensation

The Company recognized the following share-based compensation expense in SG&A in its Consolidated Statements of Income for the years ended December 31, 2017, 2016 and 2015:

		2017		2016		2015
Stock options	$	958	$	848	$	730
Nonvested stock awards and restricted stock units		2,935		3,121		2,937
Employee stock purchase plan		88		87		75
Non-elective and elective 401(k) matching contribution in stock		72		2,124		2,052
Director stock ownership plan		137		169		125
Total share-based compensation expense	$	4,190	$	6,349	$	5,919

During the first quarter of 2017, the Company began matching non-elective and elective 401(k) contributions in cash rather than stock. Also, the Company’s estimated tax payable as of December 31, 2016 and 2015, was sufficient to fully recognize $0.7 million and $0.4 million, respectively, of excess tax benefits related to stock option exercises as cash inflows from financing activities in its Consolidated Statements of Cash Flows.

Stock option activity under all plans is as follows:

			Weighted		Weighted
			Average		Average
			Exercise		Remaining	Aggregate
		Number of	Price		Contractual	Intrinsic
		Options	(per option)		Term (years)	Value
Options outstanding as of January 1, 2017		117,220	$	75.34
	Options granted	42,477		134.60
	Options exercised	(48,442)		75.94
Options outstanding as of December 31, 2017		111,255	$	97.71	5.3	$	6,013
Options expected to vest after December 31, 2017		99,484	$	100.64	5.5	$	5,086
Options exercisable as of December 31, 2017		11,771	$	72.95	3.9	$	928

The total intrinsic value of options exercised during the years ended December 31, 2017, 2016 and 2015 was approximately $3.4 million, $2.9 million and $0.9 million, respectively. Intrinsic value is calculated as the difference between the current market price of the underlying security and the strike price of a related option.

A summary of the Company’s outstanding stock options as of December 31, 2017 is as follows:

						Weighted
						Average	Weighted			Weighted
					Number	Remaining	Average		Number	Average
Range of					of Options	Contractual	Exercise Price		of Options	Exercise Price
Exercise Prices					Outstanding	Term (years)	(per option)		Exercisable	(per option)
$	30.01	-	$	40.00	552	1.2	$	38.13	552	$	38.13
$	40.01	-	$	50.00	—	—		—	—		—
$	50.01	-	$	60.00	874	2.2		58.26	874		58.26
$	60.01	-	$	70.00	—	—		—	—		—
$	70.01	-	$	80.00	52,946	5.0		72.21	7,984		72.72
$	80.01	-	$	90.00	14,406	4.2		87.30	2,361		87.30
$	90.01	-	$	130.00	—	—		—	—		—
$	130.01	-	$	140.00	42,477	6.2		134.60	—		—
					111,255	5.3		97.71	11,771		72.95

As of December 31, 2017, unrecognized compensation expense related to options granted in 2015, 2016 and 2017 was less than $0.1 million, $0.4 million and $0.8 million, respectively, to be recognized over a weighted average period of 1.78 years.

Consistent with prior years, the Company granted stock options under its LTIP plan that are subject only to time vesting over a three-year period in the first quarters of 2014, 2015, 2016 and 2017. For the purposes of determining the fair value of stock option awards, the Company uses the Black-Scholes option pricing model and the assumptions set forth in the table below:

	2017		2016		2015		2014
Number of stock options granted	42,477		67,444		38,698		37,048
Dividend yield	1.49	%	1.49	%	1.55	%	2.00	%
Expected volatility	25.52	%	28.39	%	36.32	%	43.34	%
Risk-free interest rate	1.67	%	1.08	%	1.22	%	1.22	%
Expected term (years)	4.0		4.0		4.0		4.0

These awards are being amortized on a straight-line basis over the respective vesting period of each award. The compensation expense recorded on each award during the years ended December 31, 2017, 2016 and 2015, respectively, is as follows:

		2017		2016		2015
2017 Stock option awards	$	308	$	—	$	—
2016 Stock option awards	$	332	$	282	$	—
2015 Stock option awards	$	276	$	276	$	232
2014 Stock option awards	$	42	$	254	$	257

Activity of nonvested shares granted under the Company’s LTIP plan is shown below:

		Weighted
		Average Grant
	Number of	Date Fair Value
	Shares	(per share)
Nonvested awards, December 31, 2016	109,083	$	76.23
Granted	17,315	$	136.18
Vested	(53,749)	$	75.68
Forfeited	(485)	$	76.41
Nonvested awards, December 31, 2017	72,164	$	91.03

The fair value of the nonvested stock 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 for expected forfeitures based on historical experience for similar awards. As of December 31, 2017, unrecognized compensation expense related to these awards was $2.1 million, to be recognized over a weighted average remaining period of 1.61 years.

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

		Weighted
		Average Grant
	Number of	Date Fair Value
	Units	(per unit)
Nonvested awards, December 31, 2016	5,771	$	78.69
Granted	1,332	$	134.60
Vested	(2,702)	$	78.37
Forfeited	(124)	$	105.38
Nonvested awards, December 31, 2017	4,277	$	95.53

The fair value of the nonvested restricted stock units 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 for expected forfeitures based on historical experience for similar awards. As of December 31, 2017, unrecognized compensation expense related to these awards was $0.2 million, to be recognized over a weighted average remaining period of 1.82 years.

Employee Stock Purchase Plan

In 2000, the Board adopted an Employee Stock Purchase Plan (“ESPP”) whereby employees may purchase Company stock through a payroll deduction plan. Purchases are made from the plan and credited to each participant’s account at the end of each month (the “Investment Date”). The purchase price of the stock is 85% of the fair market value on the Investment Date. The plan is compensatory and the 15% discount is expensed on the Investment Date. All employees, including officers, are eligible to participate in this plan. A participant may withdraw all uninvested payment balances credited to a participant’s account at any time. An employee whose stock ownership of the Company exceeds five percent of the outstanding common stock is not eligible to participate in this plan.

2013 Director Stock Ownership Plan

In 2013, the Company adopted the 2013 Director Stock Ownership Plan (the “Plan”), to encourage the Directors to increase their investment in the Company, which was approved at the Company’s May 2013 shareholders’ meeting. The Plan authorizes the issuance of up to 75,000 shares of Quaker common stock in accordance with the terms of the Plan in payment of all or a portion of the annual cash retainer payable to each of the Company’s non-employee directors in 2013 and subsequent years during the term of the Plan. Under the Plan, each director who, on May 1of the applicable calendar year, owns less than 400% of the annual cash retainer for the applicable calendar year, divided by the average of the closing price of a share of Quaker Common Stock as reported by the composite tape of the New York Stock Exchange for the previous calendar year (the “Threshold Amount”), is required to receive 75% of the annual cash retainer in Quaker common stock and 25% of the retainer in cash, unless the director elects to receive a greater percentage of Quaker common stock, up to 100% of the annual cash retainer for the applicable year. Each director who owns more than the Threshold Amount may elect to receive common stock in payment of a percentage (up to 100%) of the annual cash retainer. The annual retainer is $0.1 million and the retainer payment date is June 1.

Other Income (Expense)

12 Months Ended

Dec. 31, 2017

Other Income and Expenses [Abstract]

Other Income and Other Expense Disclosure [Text Block]

Note 7 – Other Expense, net

The components of other expense, net for the years ended December 31, 2017, 2016 and 2015 are as follows:

	2017		2016		2015
Income from third party license fees	$	861	$	978	$	875
Foreign exchange gains (losses), net		891		172		(1,184)
(Loss) gain on fixed asset disposals, net		(79)		50		6
Non-income tax refunds and other related credits		1,015		398		141
Pension and postretirement benefit costs, non-service components		(4,234)		(2,302)		(3,308)
Insurance insolvency recovery		600		—		—
Other non-operating income		380		338		261
Other non-operating expense		(152)		(126)		(168)
Other expense, net	$	(718)	$	(492)	$	(3,377)

Insurance insolvency recovery during the year ended December 31, 2017 represents cash proceeds from an insolvent insurance carrier with respect to previously filed recovery claim by an inactive subsidiary of the Company.

Taxes on Income

12 Months Ended

Dec. 31, 2017

Taxes on Income and Uncertain Tax Positions [Abstract]

Taxes on Income [Text Block]

Note 8 – Taxes on Income and Uncertain Tax Positions

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“U.S. Tax Reform”). U.S. Tax Reform includes multiple changes to the U.S. tax code with varying effects on the Company’s 2017 results, including, but not limited to, (i) a revaluation of the Company’s domestic deferred tax assets and liabilities based upon the reduction of the U.S. federal statutory corporate income tax rate from 35% to 21% and (ii) implementing a new system of taxation for non-U.S. earnings which eliminates U.S. federal income taxes on dividends from certain foreign subsidiaries and imposes a one-time transition tax on the deemed repatriation of undistributed earnings of certain foreign subsidiaries that is payable over eight years. U.S. Tax Reform also makes changes to the U.S. tax code that will affect 2018 and future years, including, but not limited to, (i) reduction of the U.S. federal statutory corporate tax rate; (ii) elimination of the corporate alternative minimum tax; (iii) the creation of the base erosion anti-abuse tax, a new minimum tax; (iv) a general elimination of U.S. federal income taxes on dividends from foreign subsidiaries; (v) a new provision designed to tax global intangible low-taxed income (“GILTI”), which allows for the possibility of using foreign tax credits (“FTCs”) and a deduction of up to 50 percent to offset the income tax liability (subject to some limitations); (vi) a new limitation on deductible interest expense; (vii) the repeal of the domestic production activity deduction; (viii) limitations on the deductibility of certain executive compensation; (ix) limitations on the use of FTCs to reduce the U.S. income tax liability; (x) a reduction in the dividends received deduction from 70% to 50% (in the case of less-than-20%-owned subsidiaries), and from 80% to 65% (in the case of less-than-80%-owned subsidiaries); and (xi) limitations on net operating losses (“NOLs”) generated after December 31, 2017, to 80 percent of taxable income.

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 the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to use the applicable accounting guidance on the basis of the provisions of the tax laws that were in effect immediately before the enactment of U.S. Tax Reform.

In connection with the Company’s initial analysis of the impact of U.S. Tax Reform, the Company has recorded incremental tax expense of $22.2 million for the year ended December 31, 2017, which includes deferred tax expense of approximately $4.5 million and current tax expense of approximately $17.8 million, net of the impact of eliminating U.S. federal income taxes on dividends from certain foreign subsidiaries in the current year, the details of which are described below. 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. It is possible that the Internal Revenue Service (“IRS”) could issue subsequent guidance or take positions on audit that differ from the Company’s interpretations and assumptions. The Company currently believes subsequent guidance issued or interpretations made by the IRS will not be materially different from the Company’s application of the provisions of U.S. Tax Reform.

U.S. Tax Reform reduced the U.S. federal statutory corporate tax rate from 35% to 21%, effective January 1, 2018. Consequently, the Company has recorded a decrease in domestic net deferred tax assets of approximately $4.5 million with a corresponding net adjustment to deferred income tax expense for the year ended December 31, 2017. The deemed repatriation transition tax (“Transition Tax”) is a tax on previously untaxed accumulated and current earnings and profits (“E&P”) of certain of the Company’s foreign subsidiaries. To determine the amount of the Transition Tax, the Company must determine, in addition to other factors, the amount of E&P of its relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings after 1986. The Company made a reasonable estimate of its Transition Tax and recorded a gross provisional Transition Tax obligation of $18.4 million in its December 31, 2017 financial statements. The Company will elect to pay its Transition Tax in installments over eight years as provided for in U.S. Tax Reform.

In addition, U.S. Tax Reform creates a new requirement that GILTI earned by controlled foreign corporations (“CFCs”) must be included currently in the gross income of the CFCs’ U.S. shareholder. GILTI is the excess of the shareholder’s net CFC tested income over the net deemed tangible income return, which is currently defined as the excess of (i) 10 percent of the aggregate of the U.S. shareholder’s pro-rata share of the qualified business asset investment of each CFC with respect to which it is a U.S. shareholder over (ii) the amount of certain interest expense taken into account in the determination of net CFC-tested income. Based upon the most recent information, the Company does not believe that it will be subject to the new GILTI tax rules. The Company is continuing to evaluate this provision of U.S. Tax Reform and expects to finalize its assessment during the one-year measurement period provided for by the SEC to complete the accounting for U.S. Tax Reform.

Taxes on income for the years ended December 31, 2017, 2016 and 2015 are as follows:

			2017		2016		2015
Current:
	Federal	$	21,265	$	4,680	$	8,924
	State		2,529		518		188
	Foreign		14,105		12,540		11,074
			37,899		17,738		20,186
Deferred:
	Federal		6,889		4,601		404
	State		(36)		104		(16)
	Foreign		(3,099)		783		(2,789)
Total		$	41,653	$	23,226	$	17,785

The components of earnings before income taxes for the years ended December 31, 2017, 2016 and 2015 are as follows:

		2017		2016		2015
Domestic	$	10,468	$	31,175	$	25,219
Foreign		50,200		52,834		45,011
Total	$	60,668	$	84,009	$	70,230

Total deferred tax assets and liabilities are composed of the following as of December 31, 2017 and 2016:

		2017		2016
Retirement benefits	$	5,472	$	8,236
Allowance for doubtful accounts		1,134		1,925
Insurance and litigation reserves		497		707
Postretirement benefits		1,056		1,623
Supplemental retirement benefits		2,679		3,670
Performance incentives		3,779		5,197
Equity-based compensation		1,071		2,088
Insurance settlement		4,581		7,755
Operating loss carryforward		8,602		7,343
Foreign tax credit and other credits		3,043		—
Uncertain tax positions		(410)		(101)
Restructuring		—		217
Other		2,816		2,834
		34,320		41,494
Valuation allowance		(7,401)		(6,344)
Total deferred tax assets, net	$	26,919	$	35,150
Depreciation		4,444		5,709
Europe pension and other		1,295		1,055
Amortization and other		15,373		16,012
Total deferred tax liabilities	$	21,112	$	22,776

The following are the changes in the Company’s deferred tax asset valuation allowance for the years ended December 31, 2017, 2016 and 2015:

								Effect of
		Balance at		Additional		Allowance		Exchange		Balance
		Beginning		Valuation		Utilization		Rate		at End
		of Period		Allowance		and Other		Changes		of Period
Valuation Allowance
Year ended December 31, 2017	$	6,344	$	1,127	$	(61)	$	(9)	$	7,401
Year ended December 31, 2016	$	6,259	$	294	$	(187)	$	(22)	$	6,344
Year ended December 31, 2015	$	7,345	$	86	$	(802)	$	(370)	$	6,259

The Company’s net deferred tax assets and liabilities are classified in the Consolidated Balance Sheets as of December 31, 2017 and 2016 as follows:

	2017		2016
Non-current deferred tax assets	$	15,460	$	24,382
Non-current deferred tax liabilities		9,653		12,008
Net deferred tax asset	$	5,807	$	12,374

The following is a reconciliation of income taxes at the Federal statutory rate with income taxes recorded by the Company for the years ended December 31, 2017, 2016 and 2015:

		2017		2016		2015
Income tax provision at the Federal statutory tax rate	$	21,229	$	29,403	$	24,578
Transition Tax		18,388		—		—
Revaluation of U.S. deferred tax assets and liabilities		4,470		—		—
Non-deductible acquisition expenses		4,779		696		122
Share-based compensation		(1,419)		—		—
Differences in tax rates on foreign earnings and remittances		(2,663)		(2,862)		(5,097)
Foreign dividends		—		2,939		2,690
Excess foreign tax credit utilization		(2,761)		(5,493)		(4,141)
Research and development activities credit utilization		(235)		(238)		(245)
Uncertain tax positions		(651)		(833)		226
Domestic production activities deduction		(1,155)		(875)		(910)
State income tax provisions, net		569		357		133
Non-deductible entertainment and business meals expense		248		238		249
Miscellaneous items, net		854		(106)		180
Taxes on income	$	41,653	$	23,226	$	17,785

As of December 31, 2017, the Company domestically had a net deferred tax asset of $0.3 million. In addition, the Company has foreign tax loss carryforwards of $8.9 million of which $0.2 million expires in 2018, $0.3 million expires in 2019, $0.1 million expires in 2020, $0.2 million expires in 2021, $0.1 million expires in 2022, and $0.8 million expires thereafter. The remaining foreign tax losses have no expiration dates. A partial valuation allowance has been established with respect to the tax benefit of these losses for $0.8 million.

It is the Company’s intention to continue to reinvest its undistributed earnings of non-U.S. subsidiaries to support working capital needs and certain other growth initiatives. The amount of such undistributed earnings at December 31, 2017 was approximately $300.0 million. As a result of U.S. Tax Reform, specifically the Transition Tax, the Company has provided for U.S. income taxes on these undistributed earnings, however, the Company could be subject to other taxes, such as withholding taxes and dividend distribution taxes if these undistributed earnings were ultimately remitted to the U.S. It is currently impractical to estimate any such incremental tax expense.

As of December 31, 2017, the Company’s cumulative liability for gross unrecognized tax benefits was $6.8 million. The Company had accrued approximately $1.0 million for cumulative penalties and $0.6 million for cumulative interest as of December 31, 2017. As of December 31, 2016, the Company’s cumulative liability for gross unrecognized tax benefits was $6.2 million. The Company had accrued $1.6 million for cumulative penalties and $0.7 million for cumulative interest as of December 31, 2016.

The Company continues to recognize interest and penalties associated with uncertain tax positions as a component of tax expense on income before equity in net income of associated companies in its Consolidated Statements of Income. The Company recognized a credit of $0.7 million for penalties and a credit of $0.2 million for interest (net of expirations and settlements) in its Consolidated Statement of Income for the year ended December 31, 2017, a credit of $0.2 million for penalties and a credit of $0.7 million for interest (net of expirations and settlements) in its Consolidated Statement of Income for the year ended December 31, 2016, and $0.2 million for penalties and a credit of $0.2 million for interest (net of expirations and settlements) in its Consolidated Statement of Income for the year ended December 31, 2015.

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 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.

A reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years ended December 31, 2017, 2016 and 2015, respectively, is as follows:

			2017		2016		2015
Unrecognized tax benefits as of January 1		$	6,240	$	11,032	$	11,845
	Decrease in unrecognized tax benefits taken in prior periods		(308)		(869)		(416)
	Increase in unrecognized tax benefits taken in current period		2,347		1,921		2,512
	Decrease in unrecognized tax benefits due to lapse of statute of limitations		(2,116)		(5,744)		(1,924)
	Increase (decrease) due to foreign exchange rates		598		(100)		(985)
Unrecognized tax benefits as of December 31		$	6,761	$	6,240	$	11,032

The amount of unrecognized tax benefits above that, if recognized, would impact the Company’s tax expense and effective tax rate is $2.2 million, $1.8 million and $1.1 million for the years ended December 31, 2017, 2016 and 2015, respectively.

The Company and its subsidiaries are subject to U.S. Federal income tax, as well as the income tax of various state and foreign tax jurisdictions. Tax years that remain subject to examination by major tax jurisdictions include Brazil from 2000, Italy from 2007, the Netherlands from 2011, the United Kingdom and Mexico from 2012, Spain and China from 2013, India from fiscal year beginning April 1, 2013 and ending March 31, 2014, the United States from 2014, 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. The Company has filed for competent authority relief from these assessments under the Mutual Agreement Procedures of the Organization for Economic Co-Operation and Development for all years except 2007. As of December 31, 2017, the Company believes it has adequate reserves, where merited, for uncertain tax positions with respect to these and all other audits.

Earnings Per Share

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 9 – Earnings Per Share

The following table summarizes earnings per share calculations for the years ended December 31, 2017, 2016 and 2015:

		2017		2016		2015
Basic earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	20,278	$	61,403	$	51,180
	Less: income allocated to participating securities		(137)		(515)		(443)
	Net income available to common shareholders	$	20,141	$	60,888	$	50,737
	Basic weighted average common shares outstanding		13,204,872		13,136,138		13,199,630
Basic earnings per common share		$	1.53	$	4.64	$	3.84

Diluted earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	20,278	$	61,403	$	51,180
	Less: income allocated to participating securities		(137)		(514)		(443)
	Net income available to common shareholders	$	20,141	$	60,889	$	50,737
	Basic weighted average common shares outstanding		13,204,872		13,136,138		13,199,630
	Effect of dilutive securities		41,074		24,331		15,219
	Diluted weighted average common shares outstanding		13,245,946		13,160,469		13,214,849
Diluted earnings per common share		$	1.52	$	4.63	$	3.84

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 3,671 in 2017, 678 in 2016 and 6,684 in 2015.

Accounts Receivable and Allowance for Doubtful Accounts

12 Months Ended

Dec. 31, 2017

Accounts Receivable and Allowance for Doubtful Accounts [Abstract]

Accounts Receivable and Allowance for Doubtful Accounts [Text Block]

Note 10 – Accounts Receivable and Allowance for Doubtful Accounts

As of December 31, 2017 and 2016, the Company had gross trade accounts receivable totaling $213.8 million and $202.4 million with trade accounts receivable greater than 90 days past due of $15.2 million and $18.0 million, respectively. The following are changes in the allowance for doubtful accounts during the years ended December 31, 2017, 2016 and 2015:

							Exchange Rate
	Balance at		Changes		Write-Offs		Changes		Balance
	Beginning		to Costs and		Charged to		and Other		at End
	of Period		Expenses		Allowance		Adjustments		of Period
Allowance for Doubtful Accounts
Year ended December 31, 2017	$	7,220	$	137	$	(2,206)	$	306	$	5,457
Year ended December 31, 2016	$	7,818	$	1,375	$	(1,949)	$	(24)	$	7,220
Year ended December 31, 2015	$	6,498	$	1,460	$	(261)	$	121	$	7,818

During the year ended December 31, 2015, the Company recorded a charge of $0.3 million to its allowance for doubtful accounts and SG&A, due to the bankruptcies of certain customers. There were no similar charges during the years ended December 31, 2017 or 2016, respectively. Included in write-offs charged to allowance during the years ended December 31, 2017 and 2016 were outstanding receivables related to certain prior year customer bankruptcies, which the Company previously reserved for, but settled during 2017 and 2016, respectively.

Included in exchange rate changes and other adjustments for the years ended December 31, 2016 and 2015, are allowance for doubtful accounts of less than $0.1 million and $0.4 million acquired in 2016 and 2015 business acquisitions, respectively. There was no similar adjustment in 2017.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Inventories

12 Months Ended

Dec. 31, 2017

Inventories [Abstract]

Inventories [Text Block]

Note 11 – Inventories

Total inventories as of December 31, 2017 and 2016 were as follows:

		2017		2016
Raw materials and supplies	$	44,439	$	37,772
Work in process and finished goods		42,782		39,310
Total inventories	$	87,221	$	77,082

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Text Block]

Note 12 – Property, Plant and Equipment

Property, plant and equipment as of December 31, 2017 and 2016 were as follows:

		2017		2016
Land	$	10,635	$	9,707
Building and improvements		87,111		80,740
Machinery and equipment		153,312		140,595
Construction in progress		4,932		4,964
		255,990		236,006
Less accumulated depreciation		(169,286)		(150,272)
	$	86,704	$	85,734

As of December 31, 2017, the Company has no capital leases or future minimum lease payments.

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill And Intangible Assets Disclosure [Text Block]

Note 13 – Goodwill and Other Intangible Assets

The Company has historically completed its annual goodwill impairment test as of the end of the third 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 completed its annual impairment assessment as of the end of the third quarter of 2017 and no impairment charge was warranted. In addition, the Company has recorded no impairment charges in its past. To better align the Company’s annual goodwill impairment assessment with the Company’s budget process and its related timing, the Company elected to update its annual goodwill impairment assessment during the fourth quarter of 2017 and concluded no impairment charge was warranted. Going forward, the Company will complete its annual goodwill impairment assessment during the fourth quarter.

Changes in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 were as follows:

		North						South
		America		EMEA		Asia/Pacific		America		Total
Balance as of December 31, 2015		$	42,443	$	19,280	$	15,244	$	2,144	$	79,111
	Goodwill additions (reductions)		3,311		(114)		—		—		3,197
	Currency translation adjustments		(264)		(977)		(678)		415		(1,504)
Balance as of December 31, 2016			45,490		18,189		14,566		2,559		80,804
	Goodwill additions		1,832		—		—		—		1,832
	Currency translation adjustments		249		2,315		890		(56)		3,398
Balance as of December 31, 2017		$	47,571	$	20,504	$	15,456	$	2,503	$	86,034

Gross carrying amounts and accumulated amortization for definite-lived intangible assets as of December 31, 2017 and 2016 were as follows:

	Gross Carrying				Accumulated
	Amount				Amortization
	2017		2016		2017		2016
Customer lists and rights to sell	$	76,581	$	71,454	$	25,394	$	20,043
Trademarks, formulations and product technology		33,025		31,436		14,309		11,748
Other		6,114		6,023		5,514		5,151
Total definite-lived intangible assets	$	115,720	$	108,913	$	45,217	$	36,942

The Company recorded $7.4 million, $7.0 million and $6.8 million of amortization expense during the years ended December 31, 2017, 2016 and 2015, respectively. Estimated annual aggregate amortization expense for the subsequent five years is as follows:

For the year ended December 31, 2018	$	7,348
For the year ended December 31, 2019		7,244
For the year ended December 31, 2020		6,956
For the year ended December 31, 2021		6,576
For the year ended December 31, 2022		6,449

The Company has two indefinite-lived intangible assets totaling $1.1 million for trademarks as of December 31, 2017 and 2016.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Investments in Associated Companies

12 Months Ended

Dec. 31, 2017

Investments in Associated Companies [Abstract]

Investments in Associated Companies [Text Block]

Note 14 – Investments in Associated Companies

As of December 31, 2017, the Company held a 50% investment in and had significant influence over Nippon Quaker Chemical, Ltd. (Japan), Kelko Quaker Chemical, S.A. (Panama) and Kelko Quaker Chemical, S.A. (Venezuela) and held a 33% investment in and had significant influence over Primex, Ltd. (Barbados).

The carrying amount of the Company’s equity investments as of December 31, 2017 was $25.7 million, which includes its investments of $19.5 million in Primex, Ltd. (Barbados); approximately $5.7 million in Nippon Quaker Chemical, Ltd. (Japan); $0.4 million in Kelko Quaker Chemical, S.A. (Panama); and $0.1 million in Kelko Quaker Chemical, S.A. (Venezuela).

Venezuela’s economy has been considered hyper inflationary under U.S. GAAP since 2010, at which time the Company’s Venezuela equity affiliate, Kelko Quaker Chemical, S.A. (“Kelko Venezuela”), changed its functional currency from the bolivar fuerte (“BsF”) to the U.S. dollar. Accordingly, all gains and losses resulting from the remeasurement of Kelko Venezuela’s monetary assets and liabilities to published exchange rates are required to be recorded directly to the Consolidated Statements of Income. As of December 31, 2014, there were three legally available exchange rates in Venezuela, the CADIVI (or the official rate, 6.3 BsF per U.S. dollar), the SICAD 1 and the SICAD II. Kelko Venezuela had access to the CADIVI for imported goods, had not been invited to participate in any SICAD I auctions and had limited access to the SICAD II mechanism. Accordingly, the Company measured its equity investment and other related assets with Kelko Venezuela at the CADIVI exchange rate as of December 31, 2014. During the first quarter of 2015, the Venezuela government announced changes to its foreign exchange controls. There continued to be three exchange mechanisms, however, they consisted of the CADIVI, a combined SICAD I and SICAD II auction mechanism (the “SICAD”) and a newly created, marginal currency system (the “SIMADI”). In light of the first quarter of 2015 changes to Venezuela’s foreign exchange controls and the on-going economic challenges in Venezuela, the Company re-assessed Kelko Venezuela’s access to U.S. dollars, the impact on the operations of Kelko Venezuela, and the impact on the Company’s equity investment and other related assets, which resulted in revaluing its equity investment in Kelko Venezuela and other related assets to the SIMADI exchange rate of approximately 193 BsF per U.S. dollar as of March 31, 2015. This resulted in a charge of $2.8 million in the first quarter of 2015.

During the first quarter of 2016, the Venezuela government announced further changes to its foreign exchange controls, including eliminating the CADIVI, SICAD and SIMADI exchange rate mechanisms and replacing them with a new dual foreign exchange rate system, which consists of a protected “DIPRO” exchange rate, with a rate fixed at 10 BsF per U.S. dollar and, also, a floating supplementary market exchange rate known as the “DICOM.” The DIPRO rate is only available for payment of certain imports of essential goods in the food and health sectors while the DICOM governs all other transactions not covered by the DIPRO. In light of these changes to the foreign exchange controls during the first quarter of 2016, the Company again re-assessed Kelko Venezuela’s access to U.S. dollars, the impact on the operations of Kelko Venezuela, and the impact on the Company’s equity investment and other related assets. The Company did not believe it had access to the DIPRO and, therefore, believed the DICOM to be the exchange rate system available to Kelko Venezuela, which resulted in a currency conversion charge of $0.1 million in the first quarter of 2016. Due to ongoing economic and political instability in Venezuela, the DICOM BsF per U.S. dollar exchange rate has continued to devalue during 2017. This resulted in the Company recording currency conversion charges totaling $0.4 million during the year ended December 31, 2017 to write down the Company’s equity investment to the current DICOM exchange rate. These currency conversion charges were recorded through equity in net income of associated companies in the Company’s Consolidated Statements of Income. As of December 31, 2017, the Company’s equity investment in Kelko Venezuela was valued at the DICOM exchange rate of approximately 3,341 BsF per U.S. dollar.

Summarized financial information of Nippon Quaker Chemical, Ltd. (Japan), Kelko Quaker Chemical, S.A. (Panama) and Kelko Quaker Chemical, S.A. (Venezuela), in the aggregate, is as follows:

		As of December 31,
		2017		2016
Current Assets	$	37,683	$	37,998
Noncurrent Assets		936		1,244
Current Liabilities		24,858		26,683
Noncurrent Liabilities		1,457		1,166

		Year Ended December 31,
		2017		2016		2015
Net Sales	$	42,555	$	41,448	$	40,282
Gross Margin		13,440		13,082		12,887
Income Before Income Taxes		2,900		2,289		(2,843)
Net Income		1,471		1,210		(3,631)

Summarized financial information of Primex, Ltd. is as follows:

		As of December 31,
		2017		2016
Total Assets	$	120,154	$	116,742
Total Liabilities		54,258		58,775

		Year Ended December 31,
		2017		2016		2015
Revenue	$	14,042	$	5,632	$	7,058
Income Before Income Taxes		11,705		5,622		8,407
Net Income		7,788		5,148		6,334

Other Assets

12 Months Ended

Dec. 31, 2017

Other Assets [Abstract]

Other Assets [Text Block]

Note 15 – Other Assets

Other assets as of December 31, 2017 and 2016 were as follows:

	2017		2016
Restricted insurance settlement	$	21,171	$	21,883
Uncertain tax positions		4,543		3,892
Supplemental retirement income program		1,594		1,410
Pension assets		1,184		—
Other		1,557		1,567
Total other assets	$	30,049	$	28,752

As of December 31, 2017, one of the Company’s U.S. pension plan’s fair value of plan assets exceeded its gross benefit obligation and was therefore over-funded, which is represented by the line Pension assets in the table above. See also Notes 18 of Notes to Consolidated Financial Statements.

Previously, an inactive subsidiary of the Company executed separate settlement and release agreements with two of its insurance carriers for $35.0 million, of which $21.2 million remains. 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. The proceeds of the settlement and release agreements have been deposited into interest bearing accounts which earned less than $0.1 million in the years ended December 31, 2017 and 2016, respectively, offset by $0.8 million and $1.0 million of net payments in 2017 and 2016, respectively. 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. See also Notes 19 and 23 of Notes to Consolidated Financial Statements.

Other Current Liabilities

12 Months Ended

Dec. 31, 2017

Other Current Liabilities [Abstract]

Other Accrued Liabilities Disclosure [Text Block]

Note 16 – Other Current Liabilities

Other current liabilities as of December 31, 2017 and 2016 were as follows:

		2017		2016
Non-income taxes	$	9,196	$	9,278
Professional fees		5,019		1,980
Selling expenses		2,846		2,699
Customer advances		1,507		492
Freight		1,780		2,212
Legal		1,169		754
Accrued interest		884		5
Current income taxes payable		841		2,753
Accrued rent and facilities		775		500
Other		3,304		2,755
Total other current liabilities	$	27,321	$	23,428

Debt

12 Months Ended

Dec. 31, 2017

Debt [Abstract]

Debt [Text Block]

Note 17 – Debt

Debt as of December 31, 2017 and 2016 includes the following:

		2017		2016
Credit facilities	$	48,514	$	47,948
Industrial development bonds		15,000		15,000
Municipality-related loans		3,290		3,470
Other debt obligations (including capital leases)		—		58
		66,804		66,476
Short-term debt (including capital leases)		—		(58)
Current portion of long-term debt		(5,736)		(649)
	$	61,068	$	65,769

Credit facilities

The Company’s primary credit facility (“the Credit Facility”) is a $300.0 million syndicated multicurrency credit agreement with a group of lenders which matures in June 2019. 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 net debt to adjusted EBITDA ratio cannot exceed 3.50 to 1. As of December 31, 2017 and 2016, the Company’s consolidated net debt to adjusted EBITDA ratio was below 1.0 to 1, and the Company was also in compliance with all of its other covenants. As of December 31, 2017 and 2016, the Company had total credit facility borrowings of approximately $48.5 million and $47.9 million, primarily under the Credit Facility, at weighted average borrowing rates of 1.88% and 1.25%, respectively.

Industrial development bonds

The Company has two fixed rate, industrial development authority demand bonds, with $5.0 million due in 2018 bearing interest at a rate of 5.60%, and $10.0 million due in 2028 bearing interest at a rate of 5.26%. These bonds have similar covenants to the Credit Facility noted above.

Municipality-related loans

As part of a past expansion project at the Company’s Middletown, Ohio facility, it agreed to a low interest rate $3.5 million loan with the Ohio Department of Development. Principal repayment on this loan began in September 2010 with its final maturity being in February 2021. The current interest rate of 2% will rise to 3% beginning March 2019 until final maturity. As of December 31, 2017 and 2016, there was $1.1 million and $1.5 million, respectively, outstanding on this loan.

The Company’s Verkol S.A.U. (“Verkol”) subsidiary has certain loans issued by the local government which are either interest-free or bear interest at a subsidized rate. These loans mature periodically, with the last maturity occurring in 2028. The Company records these loans at fair value based on market interest rates on the date of acquisition and continues to measure the loans at amortized cost, recognizing the implicit interest incurred. As of December 31, 2017 and 2016, there was $2.2 and $2.0 million, respectively, outstanding for these loans.

During the next five years, payments on the Company’s debt are due as follows:

2018	$	5,736
2019		49,160
2020		694
2021		407
2022		282

As of December 31, 2017 and 2016, the amounts at which the Company’s debt is recorded are not materially different from their fair market value.

Pension and Postretirement Benefits

12 Months Ended

Dec. 31, 2017

Pension and Other Postretirement Benefits [Abstract]

Pension And Other Postretirement Benefits Disclosure [Text Block]

Note 18 – Pension and Other Postretirement Benefits

The following table shows the Company’s plans’ funded status reconciled with amounts reported in the Consolidated Balance Sheets as of December 31, 2017 and 2016:

																Other Post-
				Pension Benefits												Retirement Benefits
				2017							2016					2017		2016
Change in benefit obligation				Foreign		Domestic		Total		Foreign		Domestic		Total		Domestic		Domestic
Gross benefit obligation at beginning
	of year			$	103,491	$	67,254	$	170,745	$	92,406	$	66,862	$	159,268	$	4,730	$	5,422
Service cost					3,219		337		3,556		2,378		298		2,676		8		10
Interest cost					2,066		1,932		3,998		2,314		2,114		4,428		144		142
Employee contributions					68		—		68		71		—		71		—		—
Plan settlements					—		(4,341)		(4,341)		—		—		—		—		—
Benefits paid					(2,503)		(4,031)		(6,534)		(1,583)		(4,522)		(6,105)		(448)		(443)
Plan expenses and premiums paid					(210)		—		(210)		(155)		(275)		(430)		—		—
Actuarial (gain) loss					(1,164)		1,826		662		14,848		2,777		17,625		295		(401)
Translation differences and other					13,385		—		13,385		(6,788)		—		(6,788)		—		—
Gross benefit obligation at end of year				$	118,352	$	62,977	$	181,329	$	103,491	$	67,254	$	170,745	$	4,729	$	4,730
Change in plan assets
Fair value of plan assets at
year	beginning of year			$	86,844	$	49,197	$	136,041	$	76,156	$	46,701	$	122,857	$	—	$	—
Actual return on plan assets					116		6,865		6,981		14,472		2,516		16,988		—		—
Employer contributions					2,867		4,574		7,441		3,103		4,777		7,880		448		443
Employee contributions					68		—		68		71		—		71		—		—
Plan settlements					—		(4,341)		(4,341)		—		—		—		—		—
Benefits paid					(2,503)		(4,031)		(6,534)		(1,583)		(4,522)		(6,105)		(448)		(443)
Plan expenses and premiums paid					(210)		(300)		(510)		(155)		(275)		(430)		—		—
Translation differences					11,440		—		11,440		(5,220)		—		(5,220)		—		—
Fair value of plan assets at end of year				$	98,622	$	51,964	$	150,586	$	86,844	$	49,197	$	136,041	$	—	$	—
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)
Amounts recognized in the balance
	sheet consist of:
		Non-current assets		$	—	$	1,184	$	1,184	$	—	$	—	$	—	$	—	$	—
		Current liabilities			(89)		(560)		(649)		(61)		(574)		(635)		(459)		(451)
		Non-current liabilities			(19,641)		(11,637)		(31,278)		(16,586)		(17,483)		(34,069)		(4,270)		(4,279)
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)
Amounts not yet reflected in net
	periodic benefit costs and included in
	accumulated other comprehensive loss:
		Prior service credit (cost)		$	1,744	$	(59)	$	1,685	$	1,687	$	(122)	$	1,565	$	—	$	—
		Accumulated loss			(22,598)		(27,133)		(49,731)		(20,214)		(33,147)		(53,361)		(823)		(581)

		AOCI			(20,854)		(27,192)		(48,046)		(18,527)		(33,269)		(51,796)		(823)		(581)
		Cumulative employer contributions
			in excess of or (below) net periodic
			benefit cost		1,124		16,179		17,303		1,880		15,212		17,092		(3,906)		(4,149)
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)

The accumulated benefit obligation for all defined benefit pension plans was $176.3 million ($62.2 million Domestic and approximately $114.1 million Foreign) and $167.1 million ($66.7 million Domestic and $100.4 million Foreign) as of December 31, 2017 and 2016, respectively.

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

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Projected benefit obligation	$	118,352	$	12,197	$	130,549	$	103,491	$	67,254	$	170,745
Accumulated benefit obligation		114,069		11,456		125,525		100,463		66,676		167,139
Fair value of plan assets		98,622		—		98,622		86,844		49,197		136,041

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

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Projected benefit obligation	$	118,352	$	12,197	$	130,549	$	103,491	$	67,254	$	170,745
Fair value of plan assets		98,622		—		98,622		86,844		49,197		136,041

Components of net periodic benefit costs – pension plans:

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Service cost	$	3,219	$	337	$	3,556	$	2,378	$	298	$	2,676
Interest cost		2,066		1,932		3,998		2,314		2,114		4,428
Expected return on plan assets		(1,994)		(3,067)		(5,061)		(2,026)		(3,316)		(5,342)
Settlement loss		—		1,946		1,946		—		—		—
Actuarial loss amortization		862		2,396		3,258		839		2,336		3,175
Prior service (credit) cost
amortization		(167)		63		(104)		(164)		63		(101)
Net periodic benefit cost	$	3,986	$	3,607	$	7,593	$	3,341	$	1,495	$	4,836

		2015
	Foreign		Domestic		Total
Service cost	$	2,799	$	250	$	3,049
Interest cost		2,476		2,541		5,017
Expected return on plan assets		(2,092)		(3,453)		(5,545)
Settlement loss		170		—		170
Actuarial loss amortization		1,136		2,353		3,489
Prior service (credit) cost amortization		(164)		63		(101)
Net periodic benefit cost	$	4,325	$	1,754	$	6,079

Other changes recognized in other comprehensive income – pension plans:

			2017							2016
			Foreign		Domestic		Total		Foreign		Domestic		Total
Net loss (gain) arising during
	the period		$	715	$	(1,672)	$	(957)	$	2,401	$	3,576	$	5,977
Recognition of amortization in net
	periodic benefit cost
		Prior service credit (cost)		167		(63)		104		164		(63)		101
		Actuarial loss		(862)		(4,342)		(5,204)		(839)		(2,336)		(3,175)
Effect of exchange rates on amounts
		included in AOCI		2,308		—		2,308		(1,347)		—		(1,347)
Total recognized in other
		comprehensive loss (income)		2,328		(6,077)		(3,749)		379		1,177		1,556
Total recognized in net periodic
	benefit cost and other
	comprehensive loss (income)		$	6,314	$	(2,470)	$	3,844	$	3,720	$	2,672	$	6,392

			2015
				Foreign		Domestic		Total
Net (gain) loss arising during period			$	(3,537)	$	1,134	$	(2,403)
Recognition of amortization in net periodic benefit
		Prior service credit (cost)		164		(63)		101
		Actuarial loss		(1,306)		(2,353)		(3,659)
Effect of exchange rates on amounts included
	in AOCI			(2,353)		—		(2,353)

Total recognized in other comprehensive income				(7,032)		(1,282)		(8,314)
Total recognized in net periodic benefit cost and
	other comprehensive (income) loss		$	(2,707)	$	472	$	(2,235)

Components of net periodic benefit costs – other postretirement plan:

		2017		2016		2015
Service cost	$	8	$	10	$	17
Interest cost		144		142		195
Actuarial loss amortization		54		—		83
Net periodic benefit costs	$	206	$	152	$	295

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

			2017		2016		2015
Net loss (gain) arising during period		$	295	$	(401)	$	(302)
Amortization of actuarial loss in net periodic
	benefit costs		(54)		—		(83)
Total recognized in other comprehensive loss
	(income)		241		(401)		(385)
Total recognized in net periodic benefit cost and
	other comprehensive loss (income)	$	447	$	(249)	$	(90)

Estimated amounts that will be amortized from accumulated other comprehensive loss over the next fiscal year:

							Other Post-
	Pension Plans						Retirement
	Foreign		Domestic		Total		Benefits
Actuarial loss	$	890	$	2,283	$	3,173	$	58
Prior service (credit) cost		(177)		59		(118)		—
	$	713	$	2,342	$	3,055	$	58

Weighted-average assumptions used to determine benefit obligations as of December 31, 2017 and 2016:

					Other Postretirement
	Pension Benefits				Benefits
	2017		2016		2017		2016
U.S. Plans:
Discount rate	3.44	%	3.88	%	3.39	%	3.73	%
Rate of compensation increase	3.63	%	3.63	%	N/A		N/A

Foreign Plans:
Discount rate	2.31	%	2.17	%	N/A		N/A
Rate of compensation increase	2.89	%	2.48	%	N/A		N/A

Weighted-average assumptions used to determine net periodic benefit costs for the years ended December 31, 2017 and 2016:

						Other Postretirement
		Pension Benefits				Benefits
		2017		2016		2017		2016
U.S. Plans:
Discount rate		3.88	%	4.07	%	3.73	%	3.88	%
Expected long-term return on
	plan assets	7.00	%	7.20	%	N/A		N/A
Rate of compensation increase		3.63	%	3.63	%	N/A		N/A

Foreign Plans:
Discount rate		2.17	%	2.95	%	N/A		N/A
Expected long-term return on
	plan assets	2.12	%	2.65	%	N/A		N/A
Rate of compensation increase		2.48	%	2.41	%	N/A		N/A

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

Assumed health care cost trend rates as of December 31, 2017 and 2016:

		2017		2016
Health care cost trend rate for next year		6.40	%	6.70	%
Rate to which the cost trend rate is assumed to decline (the
	ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches the ultimate trend rate		2037		2037

Assumed health care cost trend rates could have a significant effect on the amounts reported for the health care plans. A one-percentage-point change in assumed health care cost trend rates would have the following effects:

		1% Point		1% Point
		Increase		Decrease
Effect on total service and interest cost	$	16	$	(14)
Effect on postretirement benefit obligations		356		(311)

Plan Assets and Fair Value

The Company’s pension plan target asset allocation and the weighted-average asset allocations as of December 31, 2017 and 2016 by asset category were as follows:

Asset Category		Target		2017		2016
U.S. Plans
Equity securities		56	%	59	%	60	%
Debt securities		43	%	40	%	39	%
Other		1	%	1	%	1	%
	Total	100	%	100	%	100	%

Foreign Plans
Equity securities and other		25	%	25	%	24	%
Debt securities		75	%	75	%	76	%
	Total	100	%	100	%	100	%

As of December 31, 2017 and 2016, “Other” consisted principally of cash and cash equivalents (approximately 1% of plan assets in each respective period).

The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy, where applicable:

Cash and Cash Equivalents

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

Common Stock

Common stock is valued based on quoted market prices on an exchange in an active market and is classified as Level 1 investments.

Commingled Funds

Investments in the U.S. pension plan and foreign pension plan commingled funds represent pooled institutional investments, including primarily collective investment trusts. These commingled funds are not available on an exchange or in an active market and these investments are valued using their net asset value (“NAV”), which is generally based on the underlying asset values of the pooled investments held in the trusts.

As of December 31, 2017, the U.S. pension plan commingled funds included approximately 60 percent of investments in equity securities and 40 percent of investments in fixed income securities. As of December 31, 2017, foreign pension plan commingled funds included approximately 31 percent of investments in equity securities, 57 percent of investments in fixed income securities, and 12 percent of other non-related investments, primarily real estate.

Pooled Separate Accounts

Investments in the U.S. pension plan pooled separate accounts consist of insurance annuity contracts and are valued based on the reported unit value at year end. Units of the pooled separate account are not traded on an exchange or in an active market and these investments are valued using their NAV.

Insurance Contract

Investments in the foreign pension plan insurance contract are valued at the highest value available for the Company at year end, either the reported cash surrender value of the contract or the vested benefit obligation. Both the cash surrender value and the vested benefit obligation are determined based on unobservable inputs, which are contractually or actuarially determined, regarding returns, fees, the present value of the future cash flows of the contract and benefit obligations. The contract is classified as a Level 3 investment.

Diversified Equity Securities - Registered Investment Companies

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

Fixed Income – Foreign Registered Investment Companies

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

Real Estate

The foreign pension plan’s investment in real estate consists of an investment in a property fund. The fund’s underlying investments consist of real property, which are valued using unobservable inputs. The property fund is classified as a Level 3 investment

As of December 31, 2017 and 2016, the U.S. and foreign plans’ investments measured at fair value on a recurring basis were as follows:

						Fair Value Measurements at December 31, 2017
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	449		$	449	$	—	$	—
Small capitalization common stock					1,508			1,508		—		—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	1,957		$	1,957	$	—	$	—
Commingled funds measured at NAV					48,527
Pooled separate accounts measured at NAV					1,480
		Total U.S. pension plan assets		$	51,964

Foreign Pension Assets
Cash and cash equivalents				$	26		$	26	$	—	$	—
Insurance contract					82,092			—		—		82,092
Diversified equity securities - registered investment companies					9,002			—		9,002		—
Fixed income - foreign registered investment companies					2,951			—		2,951		—
Real estate - registered investment companies					2,428			—		—		2,428
	Sub-total of foreign pension assets in fair value hierarchy			$	96,499		$	26	$	11,953	$	84,520
Commingled funds measured at NAV					2,123
		Total foreign pension assets		$	98,622

			Total pension assets in fair value hierarchy	$	98,456		$	1,983	$	11,953	$	84,520
			Total pension assets measured at NAV		52,130
			Total pension assets	$	150,586

						Fair Value Measurements at December 31, 2016
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	302		$	302	$	—	$	—
Small capitalization common stock					1,279			1,279		—		—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	1,581		$	1,581	$	—	$	—
Commingled funds measured at NAV					46,185
Pooled separate accounts measured at NAV					1,431
		Total U.S. pension plan assets		$	49,197

Foreign Pension Assets
Cash and cash equivalents				$	130		$	130	$	—	$	—
Insurance contract					72,778			—		—		72,778
Diversified equity securities - registered investment companies					7,308			—		7,308		—
Fixed income - foreign registered investment companies					2,753			—		2,753		—
Real estate - registered investment companies					2,041			—		—		2,041
	Subtotal foreign pension assets in fair value hierarchy			$	85,010		$	130	$	10,061	$	74,819
Commingled funds measured at NAV					1,834
		Total foreign pension plan assets		$	86,844

			Total pension assets in fair value hierarchy	$	86,591		$	1,711	$	10,061	$	74,819
			Total pension assets measured at NAV		49,450
			Total pension assets	$	136,041

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

Changes in the fair value of the foreign plans’ Level 3 investments during the years ended December 31, 2017 and 2016 were as follows:

			Insurance		Real Estate
			Contract		Fund		Total
Balance as of December 31, 2015		$	62,409	$	2,388	$	64,797
	Purchases		2,584		—		2,584
	Settlements		(1,350)		—		(1,350)
	Unrealized gains		12,005		56		12,061
	Currency translation adjustment		(2,870)		(403)		(3,273)
Balance as of December 31, 2016			72,778		2,041		74,819
	Purchases		2,350		—		2,350
	Settlements		(1,661)		—		(1,661)
	Unrealized (losses) gains		(1,425)		188		(1,237)
	Currency translation adjustment		10,050		199		10,249
Balance as of December 31, 2017		$	82,092	$	2,428	$	84,520

U.S. pension assets include Company common stock in the amounts of $1.5 million (3% of total U.S. plan assets) and $1.3 million (3% of total U.S. plan assets) as of December 31, 2017 and 2016, respectively.

During the second quarter of 2017, the Company’s U.S. pension plan 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 the year ended December 31, 2017, the Company recorded a settlement charge of approximately $1.9 million. This settlement charge represented 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 Consolidated Statements of Income.

Cash Flows

Contributions

The Company expects to make minimum cash contributions of $9.9 million to its pension plans ($4.6 million Domestic and $5.3 million Foreign) and approximately $0.4 million to its other postretirement benefit plan in 2018.

Estimated Future Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:

							Other Post-
	Pension Benefits						Retirement
	Foreign		Domestic		Total		Benefits
2018	$	2,205	$	4,473	$	6,678	$	459
2019		2,384		4,420		6,804		441
2020		2,623		4,187		6,810		416
2021		3,322		4,159		7,481		489
2022		3,346		4,165		7,511		364
2023 to 2027		19,491		22,218		41,709		1,502

The Company maintains a plan under which supplemental retirement benefits are provided to certain officers. Benefits payable under the plan are based on a combination of years of service and existing postretirement benefits. Included in total pension costs are charges of $1.4 million, $0.9 million and $0.9 million for the years ended December 31, 2017, 2016 and 2015, respectively, representing the annual accrued benefits under this plan.

Defined Contribution Plan

The Company has a 401(k) plan with an employer match covering a majority of its domestic employees. The plan allows for and the Company previously paid a nonelective contribution on behalf of participants who have completed one year of service equal to 3% of the eligible participants’ compensation in the form of Company common stock. During the first quarter of 2017, the Company began matching both non-elective and elective 401(k) contributions in cash, rather than stock. Total Company contributions were $2.9 million, $2.7 million and $2.6 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Other Non-Current Liabilities

12 Months Ended

Dec. 31, 2017

Other Non-Current Liabilities [Abstract]

Other Non-Current Liabilities [Text Block]

Note 19 – Other Non-Current Liabilities

Other non-current liabilities as of December 31, 2017 and 2016 were as follows:

	2017		2016
Restricted insurance settlement	$	21,171	$	21,883
Non-current income taxes payable		15,825		—
Uncertain tax positions (includes interest and penalties)		7,970		7,933
Deferred and other long-term compensation		5,905		5,550
Other		625		520
Total other non-current liabilities	$	51,496	$	35,886

See also Notes 8, 15 and 23 of Notes to Consolidated Financial Statements.

Equity and Noncontrolling Interest

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Note 20 – Equity and Accumulated Other Comprehensive Loss

In May 2015, the Company’s Board of Directors authorized a share repurchase program for the repurchase of up to $100.0 million of Quaker Chemical Corporation common stock (the “2015 Share Repurchase Program”). The 2015 Share Repurchase Program has no expiration date. The 2015 Share Repurchase Program provides a framework of conditions under which management can repurchase shares of the Company’s common stock. These purchases may be made in the open market or in private and negotiated transactions and will be in accordance with applicable laws, rules and regulations. In connection with the 2015 Share Repurchase Program, the remaining unutilized 1995 and 2005 Board of Directors authorized share repurchase programs were terminated.

In connection with the 2015 Share Repurchase Program, the Company acquired 83,879 shares of common stock for $5.9 million, during the year ended December 31, 2016, and 87,386 shares of common stock for $7.3 million during the year ended December 31, 2015. There were no share repurchases under the 2015 Share Repurchase Program during the year ended December 31, 2017. The Company has elected not to hold treasury shares and therefore has retired the shares as they are repurchased. It is the Company’s accounting policy to record the excess paid over par value as a reduction in retained earnings for all shares repurchased.

Prior to September 7, 2017, the Company’s Articles of Incorporation included a time-based voting system that granted special ten-for-one-voting rights to shareholders who had beneficially owned their Quaker Chemical Corporation common stock continuously for a period of at least 36 consecutive calendar months (dating from the first day of the first full calendar month on or after the date the holder acquired beneficial ownership of such common stock) before the record date for a shareholder vote. At a meeting of the Company’s shareholders on September 7, 2017, the Company’s shareholders approved an amendment of the Company’s Articles of Incorporation that provides that every holder of Quaker Chemical Corporation common stock will be entitled to one vote for each share of common stock of the Company.

The Company has 30,000,000 shares of common stock authorized with a par value of $1, and 13,307,976 and 13,277,832 shares issued and outstanding as of December 31, 2017 and 2016, respectively. The change in shares issued and outstanding during 2017 was primarily related to 20,915 shares issued for equity-based compensation plans, 4,091 shares issued for the ESPP and 4,878 shares issued for the exercise of stock options and other employee and director-related share activity.

The Company is authorized to issue 10,000,000 shares of preferred stock with $1 par value, subject to approval by the Board of Directors. The Board of Directors may designate one or more series of preferred stock and the number of shares, rights, preferences, and limitations of each series. As of December 31, 2017, no preferred stock had been issued.

The following table shows the reclassifications from and resulting balances of AOCI for the years ended December 31, 2017, 2016 and 2015:

						Unrealized Gain (Loss) in
				Defined		Unrealized Gain (Loss) in
		Currency		Benefit		Available-for-
		Translation		Pension		Sale
		Adjustments		Plans		Securities		Total
Balance as of December 31, 2014		$	(14,312)	$	(41,551)	$	1,457	$	(54,406)
	Other comprehensive (loss) income before reclassifications		(24,232)		5,057		(850)		(20,025)
	Amounts reclassified from AOCI		—		3,642		(632)		3,010
	Related tax amounts		—		(2,399)		504		(1,895)
Balance as of December 31, 2015			(38,544)		(35,251)		479		(73,316)
	Other comprehensive (loss) income before reclassifications		(13,711)		(4,229)		834		(17,106)
	Amounts reclassified from AOCI		—		3,075		(17)		3,058
	Related tax amounts		—		237		(280)		(43)
Balance as of December 31, 2016			(52,255)		(36,168)		1,016		(87,407)
	Other comprehensive income (loss) before reclassifications		20,362		(1,646)		2,299		21,015
	Amounts reclassified from AOCI		—		5,154		(2,494)		2,660
	Related tax amounts		—		(1,433)		65		(1,368)
Balance as of December 31, 2017		$	(31,893)	$	(34,093)	$	886	$	(65,100)

Approximately 25% and 75% of the amounts reclassified from accumulated other comprehensive loss to the Consolidated Statements of Income for defined benefit retirement plans during the years ended December 31, 2017, 2016 and 2015 were recorded in COGS and SG&A, respectively. See Note 18 of Notes to 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 on the Consolidated Statements of Changes in Equity for non-controlling interest are related to currency translation adjustments.

Business Acquisitions

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Note 21 – Business Acquisitions

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, from its joint venture partner, Asianol Lubricants Private Limited. QCIL sells products to the steel and metalworking industries in India and has associates based in various locations around India. The Company had been a joint venture partner in QCIL for 20 years. QCIL is a part of the Company’s Asia/Pacific reportable operating segment. As this acquisition was a change in an existing controlling ownership, the Company recorded $21.2 million of excess purchase price over the carrying value of the noncontrolling interest in Capital in excess of par value.

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. The Company allocated approximately $3.0 million of the purchase price to intangible assets, comprised of trademarks and formulations, to be amortized over 15 years; a non-competition agreement, to be amortized over 5 years; and customer relationships, to be amortized over 10 years. In addition, the Company recorded an other current asset of approximately $0.6 million acquired with the business, and approximately $1.8 million of goodwill related to expected value not allocated to other acquired assets, all of which will be tax deductible.

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. In May 2016, the Company acquired assets of a business that is associated with dust control products for the mining industry for its North America reportable operating segment for $1.9 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 acquisitions have been finalized. The following table presents the final allocation of the purchase price of the assets acquired and liabilities assumed in all of the Company’s acquisitions in 2016:

2016 Acquisitions
Current assets (includes cash acquired)		$	3,443
Property, plant and equipment			2,574
Intangibles
	Customer lists and rights to sell		5,041
	Trademarks, formulations and
	product technology		2,543
	Other intangibles		127
Goodwill			3,355
	Total assets purchased		17,083
Current liabilities			(1,198)
Other long-term liabilities			(2,019)
	Total liabilities assumed		(3,217)
	Gross cash paid for acquisition	$	13,866
	Less: cash acquired		105
	Net cash paid for acquisition	$	13,761

In July 2015, the Company acquired Verkol, a leading specialty grease and other lubricants manufacturer based in northern Spain, included in its EMEA reportable operating segment, for 37.7 million EUR, or approximately $41.4 million. This includes a post-closing adjustment of 1.3 million EUR, or approximately $1.4 million that was accrued as of December 31, 2015 and paid during the first quarter of 2016. The purchase included cash acquired of 14.1 million EUR, or approximately $15.4 million, and assumed long-term debt of 2.2 million EUR, or approximately $2.4 million. In addition, the Company incurred $2.8 million of one-time transaction expenses in the third quarter of 2015, related to this acquisition.

In December 2014, the Company acquired a business that is principally concerned with safety fluid applications for mining sites in its Asia/Pacific reportable operating segment for net consideration of approximately 2.9 million AUD, or approximately $2.4 million. The Company also assumed an additional 0.3 million AUD, or approximately $0.2 million hold-back of consideration, which was paid out and settled during the fourth quarter of 2015.

In November 2014, the Company acquired Binol AB, a leading bio-lubricants producer primarily serving the Nordic region, included in it EMEA reportable operating segment, for 136.5 million SEK, or approximately $18.5 million, which is net of 4.4 million SEK, or approximately $0.5 million, received by the Company as part of a post-closing adjustment in the first quarter of 2015.

The results of operations of the acquired businesses and assets are included in the Consolidated Statements of Income from their respective acquisition dates. Transaction expenses associated with these acquisitions are included in SG&A in the Company’s Consolidated Statements of Income. Certain pro forma and other information is 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

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Note 22 – Fair Value Measures

The Company’s assets subject to fair value measurement were as follows:

			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	$	—

			Fair Value Measurements at December 31, 2016
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,410		$	—	$	1,410	$	—
Total	$	1,410		$	—	$	1,410	$	—

The fair values of Company-owned life insurance are based on quotes for like instruments with similar credit ratings and terms. The Company did not have liabilities subject to fair value measurement and did not hold Level 3 investments as of December 31, 2017 or 2016, 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

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies Disclosure [Text Block]

Note 23 – Commitments and Contingencies

In 1992, the Company identified certain soil and groundwater contamination at AC Products, Inc. (“ACP”), a wholly owned subsidiary. In voluntary coordination with the Santa Ana California Regional Water Quality Board (“SACRWQB”), ACP has been remediating the contamination, the principal contaminant of which is perchloroethylene (“PERC”). In 2004, the Orange County Water District (“OCWD”) filed a civil complaint against ACP and other parties seeking to recover compensatory and other damages related to the investigation and remediation of the contamination in the groundwater. Pursuant to a settlement agreement with OCWD, ACP agreed, among other things, to operate the two groundwater treatment systems to hydraulically contain groundwater contamination emanating from ACP’s site until the concentrations of PERC released by ACP fell below the current Federal maximum contaminant level for four consecutive quarterly sampling events. In 2014, ACP ceased operation at one of its two groundwater treatment systems, as it had met the above condition for closure. As of December 31, 2017, ACP believes it is close to meeting the conditions for closure of the remaining groundwater treatment system, but continues to operate this system while in discussions with the relevant authorities.

As of December 31, 2017, the Company believes that the range of potential-known liabilities associated with the balance of 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 required by the conditions noted above, as determined by groundwater modeling. Costs of operation include the operation and maintenance of the extraction well, groundwater monitoring and program management.

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 as of December 31, 2017 and 2016, respectively, to provide for such anticipated future environmental assessments and remediation costs.

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. The subsidiary discontinued operations in 1991 and has no remaining assets other than proceeds received from insurance settlements. To date, the overwhelming majority of these claims have been disposed of without payment and there have been no adverse judgments against the subsidiary. 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). Although the Company has also been named as a defendant in certain of these cases, no claims have been actively pursued against the Company, and the Company has not contributed to the defense or settlement of any of these cases pursued against the subsidiary. These cases were handled by the subsidiary’s primary and excess insurers who had agreed in 1997 to pay all defense costs and be responsible for all damages assessed against the subsidiary arising out of existing and future asbestos claims up to the aggregate limits of their policies. A significant portion of this primary insurance coverage was provided by an insurer that is insolvent, and the other primary insurers asserted that the aggregate limits of their policies have been exhausted. The subsidiary challenged the applicability of these limits to the claims being brought against the subsidiary. In response, two of the three carriers entered into separate settlement and release agreements with the subsidiary in 2005 and 2007 for $15.0 million and $20.0 million, respectively. 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. In 2007, the subsidiary and the remaining primary insurance carrier entered into a Claim Handling and Funding Agreement, under which the carrier is paying 27% of defense and indemnity costs incurred by or on behalf of the subsidiary in connection with asbestos bodily injury claims. The agreement continues until terminated and can only be terminated by either party by providing a minimum of two years prior written notice. As of December 31, 2017, no notice of termination has been given under this agreement. At the end of the term of the agreement, the subsidiary may choose to again pursue its claim against this insurer regarding the application of the policy limits. The Company believes that, if the coverage issues under the primary policies with the remaining carrier are resolved adversely to the subsidiary and all settlement proceeds were used, the subsidiary may have limited additional coverage from a state guarantee fund established following the insolvency of one of the subsidiary’s primary insurers. Nevertheless, liabilities in respect of claims may exceed the assets and coverage available to the subsidiary.

If the subsidiary’s assets and insurance coverage were to be exhausted, claimants of the subsidiary may actively pursue claims against the Company because of the parent-subsidiary relationship. The Company does not believe that such claims would have merit or that the Company would be held to have liability for any unsatisfied obligations of the subsidiary as a result of such claims. After evaluating the nature of the claims filed against the subsidiary and the small number of such claims that have resulted in any payment, the potential availability of additional insurance coverage at the subsidiary level, the additional availability of the Company’s own insurance and the Company’s strong defenses to claims that it should be held responsible for the subsidiary’s obligations because of the parent-subsidiary relationship, the Company believes it is not probable that the Company will incur losses. The Company has been successful to date having any claims naming it dismissed during initial proceedings. Since the Company may be in this stage of litigation for some time, it is not possible to estimate additional losses or range of loss, if any.

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.

The Company leases certain manufacturing and office facilities and equipment under non-cancelable operating leases with various terms from 1 to 15 years expiring in 2027. Rent expense for the years ended December 31, 2017, 2016 and 2015 was $6.4 million, $5.6 million, and $5.9 million, respectively.

The Company’s minimum rental commitments under operating leases as of December 31, 2017 for future years were approximately:

2018	$	5,345
2019		4,494
2020		3,708
2021		3,208
2022		2,812
2023 and beyond		8,033

Quarterly Results - Unaudited

12 Months Ended

Dec. 31, 2017

Quarterly Results (unaudited) [Abstract]

Quarterly Results - Unaudited [Text Block]

Note 24 – Quarterly Results (unaudited)

			First		Second		Third		Fourth
			Quarter (1)		Quarter (2)		Quarter (3)		Quarter (4)
2017
	Net sales		$	194,909	$	201,183	$	212,918	$	211,072
	Gross profit			70,887		71,835		74,776		73,997
	Operating income			13,758		17,903		14,009		17,074
	Net income (loss) attributable to Quaker Chemical Corporation			6,992		11,906		11,142		(9,762)
	Net income (loss) attributable to Quaker Chemical Corporation
		Common Shareholders - Basic (5)	$	0.53	$	0.90	$	0.84	$	(0.73)
	Net income (loss) attributable to Quaker Chemical Corporation
		Common Shareholders - Diluted (5)	$	0.52	$	0.89	$	0.83	$	(0.73)

2016
	Net sales		$	178,077	$	186,915	$	190,428	$	191,245
	Gross profit			67,981		71,401		70,897		69,831
	Operating income			19,838		22,701		21,863		20,951
	Net income attributable to Quaker Chemical Corporation			12,946		15,015		16,008		17,434
	Net income attributable to Quaker Chemical Corporation
		Common Shareholders - Basic (5)	$	0.98	$	1.13	$	1.21	$	1.31
	Net income attributable to Quaker Chemical Corporation
		Common Shareholders - Diluted (5)	$	0.98	$	1.13	$	1.21	$	1.31

(1) Net income attributable to Quaker Chemical Corporation for both the first quarter of 2017 and 2016 includes earnings from the Company’s equity interest in a captive insurance company of $0.6 million and $0.1 million, respectively. Net income attributable to Quaker Chemical Corporation for the first quarter of 2017 includes Houghton combination-related expenses of $9.1 million and $0.3 million of cost streamlining expenses associated with certain actions taken to reorganize the Company’s corporate staff. Net income attributable to Quaker Chemical Corporation for the first quarter of 2016 includes a currency conversion charge of $0.1 million related to the Company’s 50% owned equity affiliate in Venezuela.

(2) Net income attributable to Quaker Chemical Corporation for both the second quarter of 2017 and 2016 includes earnings from the Company’s equity interest in a captive insurance company of $0.4 million and $0.3 million, respectively. Net income attributable to Quaker Chemical Corporation for the second quarter of 2017 includes Houghton combination-related expenses of $4.3 million, a $1.9 million charge for the Company’s U.S. pension plan settlement of its vested terminated participants and a currency conversion charge of $0.3 million related to the Company’s 50% owned equity affiliate in Venezuela.

(3) Net income attributable to Quaker Chemical Corporation for both the third quarter of 2017 and 2016 includes earnings from the Company’s equity interest in a captive insurance company of $0.4 million and $0.6 million, respectively and charges of $9.7 million and $1.2 million, respectively, for Houghton combination-related expenses. Net income attributable to Quaker Chemical Corporation for the third quarter of 2017 includes a currency conversion charge of less than $0.1 million related to the Company’s 50% owned equity affiliate in Venezuela.

(4) Net income attributable to Quaker Chemical Corporation for both the fourth quarter of 2017 and 2016 includes earnings from the Company’s equity interest in a captive insurance company of $1.1 million and $0.7 million, respectively and charges of $7.7 million and $0.4 million, respectively, for Houghton combination-related expenses, including ticking fees in the fourth quarter of 2017. Net income attributable to Quaker Chemical Corporation for the fourth quarter of 2017 includes a charge of $22.2 million related to the impact of U.S. Tax Reform, a charge of $0.1 million related to a loss on disposal of a held-for-sale asset, other income of $0.6 million related to cash proceeds from an insolvent insurance carrier with respect to previously filed recovery claims by an inactive subsidiary of the Company and a currency conversion charge of less than $0.1 million related to the Company’s 50% owned equity affiliate in Venezuela. Net income attributable to Quaker Chemical Corporation for the fourth quarter of 2016 includes credits of $0.4 million, related to a global restructuring plan.

(5) Basic and diluted per share amounts of net income attributable to Quaker Chemical Corporation common shareholders for all four quarters above may not total to the full year amounts presented in the Company’s consolidated financial statements for the years ended December 31, 2017 and 2016, respectively, due to rounding.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidation, Policy [Policy Text Block]

All majority-owned subsidiaries are included in the Company’s consolidated financial statements, with appropriate elimination of intercompany balances and transactions.

Consolidation, Variable Interest Entity, Policy [Policy Text Block]

The Company is not the primary beneficiary of any variable interest entities (“VIEs”) and therefore the Company’s consolidated financial statements do not include the accounts of any VIEs.

Equity and Cost Method Investments, Policy [Policy Text Block]

Investments in associated companies (less than majority-owned and in which the Company has significant influence) are accounted for under the equity method. The Company’s share of net income or losses in these investments in associated companies is included in the Consolidated Statements of Income. The Company periodically reviews these investments for impairments and, if necessary, would adjust these investments to their fair value when a decline in market value or other impairment indicators are deemed to be other than temporary.

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Cash and Cash Equivalents, Policy [Policy Text Block]

Inventory, Policy [Policy Text Block]

Inventories: Inventories are valued at the lower of cost or net realizable value, and are valued using the first-in, first-out method.

Property, Plant and Equipment, Policy [Policy Text Block]

Internal Use Software, Policy [Policy Text Block]

Goodwill and Intangible Assets, Policy [Policy Text Block]

Revenue Recognition Accounting Policy, Gross and Net Revenue Disclosure [Policy Text Block]

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]

Research and Development Expense, Policy [Policy Text Block]

Research and development costs: Research and development costs are expensed as incurred and are included in selling, general and administrative expenses (“SG&A”).

Environmental Costs, Policy [Policy Text Block]

Asset Retirement Obligations, Policy [Policy Text Block]

Pension and Other Postretirement Plans, Policy [Policy Text Block]

Comprehensive Income, Policy [Policy Text Block]

Income Tax, Policy [Policy Text Block]

Income Tax Uncertainties, Policy [Policy Text Block]

The FASB’s guidance regarding accounting for uncertainty in income taxes prescribes the recognition threshold and measurement attributes for financial statement recognition and measurement of tax positions taken or expected to be taken on a tax return. The guidance further requires the determination of whether the benefits of tax positions will be more likely than not sustained upon audit based upon the technical merits of the tax position. For tax positions that are determined to be more likely than not sustained upon audit, a company recognizes the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not determined to be more likely than not sustained upon audit, a company does not recognize any portion of the benefit in the financial statements. Additionally, the Company monitors and adjusts for derecognition, classification, and penalties and interest in interim periods, with appropriate disclosure and transition thereto. Also, the amount of interest expense and income related to uncertain tax positions is computed by applying the applicable statutory rate of interest to the difference between the tax position recognized, including timing differences, and the amount previously taken or expected to be taken in a tax return. The Company’s continuing practice is to recognize interest and/or penalties related to income tax matters in income tax expense. Finally, when applicable, the Company nets its liability for unrecognized tax benefits against deferred tax assets related to net operating losses or other tax credit carryforwards that would apply if the uncertain tax position were settled for the presumed amount at the balance sheet date.

Derivatives, Policy [Policy Text Block]

Fair Value of Financial Instruments, Policy [Policy Text Block]

	•	Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.
	•	Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.
	•	Level 3: Unobservable inputs that reflect the reporting entity's own assumptions.

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Earnings Per Share, Policy [Policy Text Block]

Segment Reporting, Policy [Policy Text Block]

Business Combinations Policy [Policy Text Block]

Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]

Reclassification, Policy [Policy Text Block]

Reclassifications: Certain information has been reclassified to conform to the current year presentation.

Use of Estimates, Policy [Policy Text Block]

Restructuring Activities (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring And Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

		North						South
		America		EMEA		Asia/Pacific		America		Total
Accrued restructuring as of
December 31, 2014		$	—	$	—	$	—	$	—	$	—
	Restructuring charges		2,025		4,390		338		37		6,790
	Cash payments		(158)		(130)		(202)		—		(490)
	Currency translation adjustments		—		5		(1)		(1)		3
Accrued restructuring as of
December 31, 2015			1,867		4,265		135		36		6,303
	Restructuring credits		—		(439)		—		—		(439)
	Cash payments		(1,671)		(3,404)		(138)		(39)		(5,252)
	Currency translation adjustments		—		52		3		3		58
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
December 31, 2017		$	—	$	—	$	—	$	—	$	—

Business Segments (Tables)

12 Months Ended

Dec. 31, 2017

Segment Disclosures [Abstract]

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

		2017		2016		2015
Segment assets
	North America (including Corporate)	$	324,260	$	321,404	$	317,082
	EMEA		177,267		147,021		162,647
	Asia/Pacific		196,891		200,218		181,389
	South America		23,708		23,385		19,609
	Total segment assets	$	722,126	$	692,028	$	680,727

		2017		2016		2015
Segment long-lived assets
	North America (including Corporate)	$	88,818	$	86,775	$	87,421
	EMEA		28,507		25,630		27,101
	Asia/Pacific		22,427		22,040		23,096
	South America		2,691		2,858		2,573
	Total segment long-lived assets	$	142,443	$	137,303	$	140,191

		2017		2016		2015
Capital expenditures
	North America (including Corporate)	$	3,919	$	2,918	$	4,166
	EMEA		3,936		3,263		3,081
	Asia/Pacific		2,458		3,269		3,169
	South America		559		504		617
	Total segment capital expenditures	$	10,872	$	9,954	$	11,033

		2017		2016		2015
Depreciation
	North America	$	5,791	$	5,672	$	5,577
	EMEA		3,368		3,323		2,975
	Asia/Pacific		2,669		2,765		2,812
	South America		649		672		832
	Total segment depreciation	$	12,477	$	12,432	$	12,196

		2017		2016		2015
Net sales
	North America	$	356,598	$	336,174	$	344,248
	EMEA		226,243		200,917		179,717
	Asia/Pacific		201,008		179,131		181,056
	South America		36,233		30,443		32,534
	Total net sales	$	820,082	$	746,665	$	737,555

		2017		2016		2015
Operating earnings, excluding indirect operating expenses
	North America	$	77,694	$	77,833	$	80,239
	EMEA		35,350		33,810		28,236
	Asia/Pacific		48,342		45,866		45,107
	South America		3,927		1,386		1,785
	Total operating earnings, excluding indirect operating expenses		165,313		158,895		155,367

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

		2017		2016		2015
Operating earnings, excluding indirect operating expenses
	North America	$	77,694	$	77,833	$	80,239
	EMEA		35,350		33,810		28,236
	Asia/Pacific		48,342		45,866		45,107
	South America		3,927		1,386		1,785
Total operating earnings, excluding indirect operating expenses			165,313		158,895		155,367
Non-operating charges			(65,142)		(65,316)		(66,999)
Restructuring and related activities			—		439		(6,790)
Combination-related expenses			(29,938)		(1,531)		—
Depreciation of corporate assets and amortization			(7,489)		(7,134)		(7,010)
Operating income			62,744		85,353		74,568
Other expense, net			(718)		(492)		(3,377)
Interest expense			(3,892)		(2,889)		(2,585)
Interest income			2,534		2,037		1,624
Income before taxes and equity in net income of
	associated companies	$	60,668	$	84,009	$	70,230

Schedule of Product Information [Table Text Block]

	2017		2016		2015
Rolling lubricants	17.8	%	19.0	%	18.6	%
Machining and grinding compounds	15.8	%	14.9	%	15.3	%
Hydraulic fluids	11.6	%	12.0	%	12.6	%
Corrosion preventives	11.4	%	11.8	%	12.0	%
Specialty greases	10.0	%	10.1	%	8.5	%

Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

		2017		2016		2015
Stock options	$	958	$	848	$	730
Nonvested stock awards and restricted stock units		2,935		3,121		2,937
Employee stock purchase plan		88		87		75
Non-elective and elective 401(k) matching contribution in stock		72		2,124		2,052
Director stock ownership plan		137		169		125
Total share-based compensation expense	$	4,190	$	6,349	$	5,919

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

			Weighted		Weighted
			Average		Average
			Exercise		Remaining	Aggregate
		Number of	Price		Contractual	Intrinsic
		Options	(per option)		Term (years)	Value
Options outstanding as of January 1, 2017		117,220	$	75.34
	Options granted	42,477		134.60
	Options exercised	(48,442)		75.94
Options outstanding as of December 31, 2017		111,255	$	97.71	5.3	$	6,013
Options expected to vest after December 31, 2017		99,484	$	100.64	5.5	$	5,086
Options exercisable as of December 31, 2017		11,771	$	72.95	3.9	$	928

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

						Weighted
						Average	Weighted			Weighted
					Number	Remaining	Average		Number	Average
Range of					of Options	Contractual	Exercise Price		of Options	Exercise Price
Exercise Prices					Outstanding	Term (years)	(per option)		Exercisable	(per option)
$	30.01	-	$	40.00	552	1.2	$	38.13	552	$	38.13
$	40.01	-	$	50.00	—	—		—	—		—
$	50.01	-	$	60.00	874	2.2		58.26	874		58.26
$	60.01	-	$	70.00	—	—		—	—		—
$	70.01	-	$	80.00	52,946	5.0		72.21	7,984		72.72
$	80.01	-	$	90.00	14,406	4.2		87.30	2,361		87.30
$	90.01	-	$	130.00	—	—		—	—		—
$	130.01	-	$	140.00	42,477	6.2		134.60	—		—
					111,255	5.3		97.71	11,771		72.95

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

	2017		2016		2015		2014
Number of stock options granted	42,477		67,444		38,698		37,048
Dividend yield	1.49	%	1.49	%	1.55	%	2.00	%
Expected volatility	25.52	%	28.39	%	36.32	%	43.34	%
Risk-free interest rate	1.67	%	1.08	%	1.22	%	1.22	%
Expected term (years)	4.0		4.0		4.0		4.0

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

		2017		2016		2015
2017 Stock option awards	$	308	$	—	$	—
2016 Stock option awards	$	332	$	282	$	—
2015 Stock option awards	$	276	$	276	$	232
2014 Stock option awards	$	42	$	254	$	257

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

		Weighted
		Average Grant
	Number of	Date Fair Value
	Shares	(per share)
Nonvested awards, December 31, 2016	109,083	$	76.23
Granted	17,315	$	136.18
Vested	(53,749)	$	75.68
Forfeited	(485)	$	76.41
Nonvested awards, December 31, 2017	72,164	$	91.03

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

		Weighted
		Average Grant
	Number of	Date Fair Value
	Units	(per unit)
Nonvested awards, December 31, 2016	5,771	$	78.69
Granted	1,332	$	134.60
Vested	(2,702)	$	78.37
Forfeited	(124)	$	105.38
Nonvested awards, December 31, 2017	4,277	$	95.53

Other Income (Expense) (Tables)

12 Months Ended

Dec. 31, 2017

Other Income and Expenses [Abstract]

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

	2017		2016		2015
Income from third party license fees	$	861	$	978	$	875
Foreign exchange gains (losses), net		891		172		(1,184)
(Loss) gain on fixed asset disposals, net		(79)		50		6
Non-income tax refunds and other related credits		1,015		398		141
Pension and postretirement benefit costs, non-service components		(4,234)		(2,302)		(3,308)
Insurance insolvency recovery		600		—		—
Other non-operating income		380		338		261
Other non-operating expense		(152)		(126)		(168)
Other expense, net	$	(718)	$	(492)	$	(3,377)

Taxes on Income and Uncertain Positions (Tables)

12 Months Ended

Dec. 31, 2017

Taxes on Income and Uncertain Tax Positions [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

			2017		2016		2015
Current:
	Federal	$	21,265	$	4,680	$	8,924
	State		2,529		518		188
	Foreign		14,105		12,540		11,074
			37,899		17,738		20,186
Deferred:
	Federal		6,889		4,601		404
	State		(36)		104		(16)
	Foreign		(3,099)		783		(2,789)
Total		$	41,653	$	23,226	$	17,785

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

		2017		2016		2015
Domestic	$	10,468	$	31,175	$	25,219
Foreign		50,200		52,834		45,011
Total	$	60,668	$	84,009	$	70,230

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		2017		2016
Retirement benefits	$	5,472	$	8,236
Allowance for doubtful accounts		1,134		1,925
Insurance and litigation reserves		497		707
Postretirement benefits		1,056		1,623
Supplemental retirement benefits		2,679		3,670
Performance incentives		3,779		5,197
Equity-based compensation		1,071		2,088
Insurance settlement		4,581		7,755
Operating loss carryforward		8,602		7,343
Foreign tax credit and other credits		3,043		—
Uncertain tax positions		(410)		(101)
Restructuring		—		217
Other		2,816		2,834
		34,320		41,494
Valuation allowance		(7,401)		(6,344)
Total deferred tax assets, net	$	26,919	$	35,150
Depreciation		4,444		5,709
Europe pension and other		1,295		1,055
Amortization and other		15,373		16,012
Total deferred tax liabilities	$	21,112	$	22,776

Schedule of Deferred Income Tax Assets Valuation Allowance [Table Text Block]

								Effect of
		Balance at		Additional		Allowance		Exchange		Balance
		Beginning		Valuation		Utilization		Rate		at End
		of Period		Allowance		and Other		Changes		of Period
Valuation Allowance
Year ended December 31, 2017	$	6,344	$	1,127	$	(61)	$	(9)	$	7,401
Year ended December 31, 2016	$	6,259	$	294	$	(187)	$	(22)	$	6,344
Year ended December 31, 2015	$	7,345	$	86	$	(802)	$	(370)	$	6,259

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		2017		2016		2015
Income tax provision at the Federal statutory tax rate	$	21,229	$	29,403	$	24,578
Transition Tax		18,388		—		—
Revaluation of U.S. deferred tax assets and liabilities		4,470		—		—
Non-deductible acquisition expenses		4,779		696		122
Share-based compensation		(1,419)		—		—
Differences in tax rates on foreign earnings and remittances		(2,663)		(2,862)		(5,097)
Foreign dividends		—		2,939		2,690
Excess foreign tax credit utilization		(2,761)		(5,493)		(4,141)
Research and development activities credit utilization		(235)		(238)		(245)
Uncertain tax positions		(651)		(833)		226
Domestic production activities deduction		(1,155)		(875)		(910)
State income tax provisions, net		569		357		133
Non-deductible entertainment and business meals expense		248		238		249
Miscellaneous items, net		854		(106)		180
Taxes on income	$	41,653	$	23,226	$	17,785

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

			2017		2016		2015
Unrecognized tax benefits as of January 1		$	6,240	$	11,032	$	11,845
	Decrease in unrecognized tax benefits taken in prior periods		(308)		(869)		(416)
	Increase in unrecognized tax benefits taken in current period		2,347		1,921		2,512
	Decrease in unrecognized tax benefits due to lapse of statute of limitations		(2,116)		(5,744)		(1,924)
	Increase (decrease) due to foreign exchange rates		598		(100)		(985)
Unrecognized tax benefits as of December 31		$	6,761	$	6,240	$	11,032

Schedule Of Deferred Tax Assets And Liabilities Balance Sheet Classification [Table Text Block]

	2017		2016
Non-current deferred tax assets	$	15,460	$	24,382
Non-current deferred tax liabilities		9,653		12,008
Net deferred tax asset	$	5,807	$	12,374

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

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

		2017		2016		2015
Basic earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	20,278	$	61,403	$	51,180
	Less: income allocated to participating securities		(137)		(515)		(443)
	Net income available to common shareholders	$	20,141	$	60,888	$	50,737
	Basic weighted average common shares outstanding		13,204,872		13,136,138		13,199,630
Basic earnings per common share		$	1.53	$	4.64	$	3.84

Diluted earnings per common share
	Net income attributable to Quaker Chemical Corporation	$	20,278	$	61,403	$	51,180
	Less: income allocated to participating securities		(137)		(514)		(443)
	Net income available to common shareholders	$	20,141	$	60,889	$	50,737
	Basic weighted average common shares outstanding		13,204,872		13,136,138		13,199,630
	Effect of dilutive securities		41,074		24,331		15,219
	Diluted weighted average common shares outstanding		13,245,946		13,160,469		13,214,849
Diluted earnings per common share		$	1.52	$	4.63	$	3.84

AR and Allowance for Doubtful Accounts (Tables)

12 Months Ended

Dec. 31, 2017

Accounts Receivable and Allowance for Doubtful Accounts [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

							Exchange Rate
	Balance at		Changes		Write-Offs		Changes		Balance
	Beginning		to Costs and		Charged to		and Other		at End
	of Period		Expenses		Allowance		Adjustments		of Period
Allowance for Doubtful Accounts
Year ended December 31, 2017	$	7,220	$	137	$	(2,206)	$	306	$	5,457
Year ended December 31, 2016	$	7,818	$	1,375	$	(1,949)	$	(24)	$	7,220
Year ended December 31, 2015	$	6,498	$	1,460	$	(261)	$	121	$	7,818

Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

		2017		2016
Raw materials and supplies	$	44,439	$	37,772
Work in process and finished goods		42,782		39,310
Total inventories	$	87,221	$	77,082

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

		2017		2016
Land	$	10,635	$	9,707
Building and improvements		87,111		80,740
Machinery and equipment		153,312		140,595
Construction in progress		4,932		4,964
		255,990		236,006
Less accumulated depreciation		(169,286)		(150,272)
	$	86,704	$	85,734

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

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, 2015		$	42,443	$	19,280	$	15,244	$	2,144	$	79,111
	Goodwill additions (reductions)		3,311		(114)		—		—		3,197
	Currency translation adjustments		(264)		(977)		(678)		415		(1,504)
Balance as of December 31, 2016			45,490		18,189		14,566		2,559		80,804
	Goodwill additions		1,832		—		—		—		1,832
	Currency translation adjustments		249		2,315		890		(56)		3,398
Balance as of December 31, 2017		$	47,571	$	20,504	$	15,456	$	2,503	$	86,034

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	Gross Carrying				Accumulated
	Amount				Amortization
	2017		2016		2017		2016
Customer lists and rights to sell	$	76,581	$	71,454	$	25,394	$	20,043
Trademarks, formulations and product technology		33,025		31,436		14,309		11,748
Other		6,114		6,023		5,514		5,151
Total definite-lived intangible assets	$	115,720	$	108,913	$	45,217	$	36,942

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

For the year ended December 31, 2018	$	7,348
For the year ended December 31, 2019		7,244
For the year ended December 31, 2020		6,956
For the year ended December 31, 2021		6,576
For the year ended December 31, 2022		6,449

Investment in Associated Companies (Tables)

12 Months Ended

Dec. 31, 2017

Investments in Associated Companies [Abstract]

Schedule of Equity Method Investments [Table Text Block]

		As of December 31,
		2017		2016
Current Assets	$	37,683	$	37,998
Noncurrent Assets		936		1,244
Current Liabilities		24,858		26,683
Noncurrent Liabilities		1,457		1,166

		Year Ended December 31,
		2017		2016		2015
Net Sales	$	42,555	$	41,448	$	40,282
Gross Margin		13,440		13,082		12,887
Income Before Income Taxes		2,900		2,289		(2,843)
Net Income		1,471		1,210		(3,631)

		As of December 31,
		2017		2016
Total Assets	$	120,154	$	116,742
Total Liabilities		54,258		58,775

		Year Ended December 31,
		2017		2016		2015
Revenue	$	14,042	$	5,632	$	7,058
Income Before Income Taxes		11,705		5,622		8,407
Net Income		7,788		5,148		6,334

Other Assets (Tables)

12 Months Ended

Dec. 31, 2017

Other Assets [Abstract]

Schedule of Other Assets, Noncurrent [Table Text Block]

	2017		2016
Restricted insurance settlement	$	21,171	$	21,883
Uncertain tax positions		4,543		3,892
Supplemental retirement income program		1,594		1,410
Pension assets		1,184		—
Other		1,557		1,567
Total other assets	$	30,049	$	28,752

Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Other Current Liabilities [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

		2017		2016
Non-income taxes	$	9,196	$	9,278
Professional fees		5,019		1,980
Selling expenses		2,846		2,699
Customer advances		1,507		492
Freight		1,780		2,212
Legal		1,169		754
Accrued interest		884		5
Current income taxes payable		841		2,753
Accrued rent and facilities		775		500
Other		3,304		2,755
Total other current liabilities	$	27,321	$	23,428

Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt [Abstract]

Schedule of Debt [Table Text Block]

		2017		2016
Credit facilities	$	48,514	$	47,948
Industrial development bonds		15,000		15,000
Municipality-related loans		3,290		3,470
Other debt obligations (including capital leases)		—		58
		66,804		66,476
Short-term debt (including capital leases)		—		(58)
Current portion of long-term debt		(5,736)		(649)
	$	61,068	$	65,769

Schedule of Maturities of Long-term Debt [Table Text Block]

2018	$	5,736
2019		49,160
2020		694
2021		407
2022		282

Pension and Other Post Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Pension and Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

																Other Post-
				Pension Benefits												Retirement Benefits
				2017							2016					2017		2016
Change in benefit obligation				Foreign		Domestic		Total		Foreign		Domestic		Total		Domestic		Domestic
Gross benefit obligation at beginning
	of year			$	103,491	$	67,254	$	170,745	$	92,406	$	66,862	$	159,268	$	4,730	$	5,422
Service cost					3,219		337		3,556		2,378		298		2,676		8		10
Interest cost					2,066		1,932		3,998		2,314		2,114		4,428		144		142
Employee contributions					68		—		68		71		—		71		—		—
Plan settlements					—		(4,341)		(4,341)		—		—		—		—		—
Benefits paid					(2,503)		(4,031)		(6,534)		(1,583)		(4,522)		(6,105)		(448)		(443)
Plan expenses and premiums paid					(210)		—		(210)		(155)		(275)		(430)		—		—
Actuarial (gain) loss					(1,164)		1,826		662		14,848		2,777		17,625		295		(401)
Translation differences and other					13,385		—		13,385		(6,788)		—		(6,788)		—		—
Gross benefit obligation at end of year				$	118,352	$	62,977	$	181,329	$	103,491	$	67,254	$	170,745	$	4,729	$	4,730
Change in plan assets
Fair value of plan assets at
year	beginning of year			$	86,844	$	49,197	$	136,041	$	76,156	$	46,701	$	122,857	$	—	$	—
Actual return on plan assets					116		6,865		6,981		14,472		2,516		16,988		—		—
Employer contributions					2,867		4,574		7,441		3,103		4,777		7,880		448		443
Employee contributions					68		—		68		71		—		71		—		—
Plan settlements					—		(4,341)		(4,341)		—		—		—		—		—
Benefits paid					(2,503)		(4,031)		(6,534)		(1,583)		(4,522)		(6,105)		(448)		(443)
Plan expenses and premiums paid					(210)		(300)		(510)		(155)		(275)		(430)		—		—
Translation differences					11,440		—		11,440		(5,220)		—		(5,220)		—		—
Fair value of plan assets at end of year				$	98,622	$	51,964	$	150,586	$	86,844	$	49,197	$	136,041	$	—	$	—
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)
Amounts recognized in the balance
	sheet consist of:
		Non-current assets		$	—	$	1,184	$	1,184	$	—	$	—	$	—	$	—	$	—
		Current liabilities			(89)		(560)		(649)		(61)		(574)		(635)		(459)		(451)
		Non-current liabilities			(19,641)		(11,637)		(31,278)		(16,586)		(17,483)		(34,069)		(4,270)		(4,279)
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)
Amounts not yet reflected in net
	periodic benefit costs and included in
	accumulated other comprehensive loss:
		Prior service credit (cost)		$	1,744	$	(59)	$	1,685	$	1,687	$	(122)	$	1,565	$	—	$	—
		Accumulated loss			(22,598)		(27,133)		(49,731)		(20,214)		(33,147)		(53,361)		(823)		(581)

		AOCI			(20,854)		(27,192)		(48,046)		(18,527)		(33,269)		(51,796)		(823)		(581)
		Cumulative employer contributions
			in excess of or (below) net periodic
			benefit cost		1,124		16,179		17,303		1,880		15,212		17,092		(3,906)		(4,149)
Net benefit obligation recognized				$	(19,730)	$	(11,013)	$	(30,743)	$	(16,647)	$	(18,057)	$	(34,704)	$	(4,729)	$	(4,730)

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Projected benefit obligation	$	118,352	$	12,197	$	130,549	$	103,491	$	67,254	$	170,745
Accumulated benefit obligation		114,069		11,456		125,525		100,463		66,676		167,139
Fair value of plan assets		98,622		—		98,622		86,844		49,197		136,041

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Projected benefit obligation	$	118,352	$	12,197	$	130,549	$	103,491	$	67,254	$	170,745
Fair value of plan assets		98,622		—		98,622		86,844		49,197		136,041

Schedule of Net Benefit Costs [Table Text Block]

	2017							2016
	Foreign		Domestic		Total		Foreign		Domestic		Total
Service cost	$	3,219	$	337	$	3,556	$	2,378	$	298	$	2,676
Interest cost		2,066		1,932		3,998		2,314		2,114		4,428
Expected return on plan assets		(1,994)		(3,067)		(5,061)		(2,026)		(3,316)		(5,342)
Settlement loss		—		1,946		1,946		—		—		—
Actuarial loss amortization		862		2,396		3,258		839		2,336		3,175
Prior service (credit) cost
amortization		(167)		63		(104)		(164)		63		(101)
Net periodic benefit cost	$	3,986	$	3,607	$	7,593	$	3,341	$	1,495	$	4,836

		2015
	Foreign		Domestic		Total
Service cost	$	2,799	$	250	$	3,049
Interest cost		2,476		2,541		5,017
Expected return on plan assets		(2,092)		(3,453)		(5,545)
Settlement loss		170		—		170
Actuarial loss amortization		1,136		2,353		3,489
Prior service (credit) cost amortization		(164)		63		(101)
Net periodic benefit cost	$	4,325	$	1,754	$	6,079

		2017		2016		2015
Service cost	$	8	$	10	$	17
Interest cost		144		142		195
Actuarial loss amortization		54		—		83
Net periodic benefit costs	$	206	$	152	$	295

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

			2017							2016
			Foreign		Domestic		Total		Foreign		Domestic		Total
Net loss (gain) arising during
	the period		$	715	$	(1,672)	$	(957)	$	2,401	$	3,576	$	5,977
Recognition of amortization in net
	periodic benefit cost
		Prior service credit (cost)		167		(63)		104		164		(63)		101
		Actuarial loss		(862)		(4,342)		(5,204)		(839)		(2,336)		(3,175)
Effect of exchange rates on amounts
		included in AOCI		2,308		—		2,308		(1,347)		—		(1,347)
Total recognized in other
		comprehensive loss (income)		2,328		(6,077)		(3,749)		379		1,177		1,556
Total recognized in net periodic
	benefit cost and other
	comprehensive loss (income)		$	6,314	$	(2,470)	$	3,844	$	3,720	$	2,672	$	6,392

			2015
				Foreign		Domestic		Total
Net (gain) loss arising during period			$	(3,537)	$	1,134	$	(2,403)
Recognition of amortization in net periodic benefit
		Prior service credit (cost)		164		(63)		101
		Actuarial loss		(1,306)		(2,353)		(3,659)
Effect of exchange rates on amounts included
	in AOCI			(2,353)		—		(2,353)

Total recognized in other comprehensive income				(7,032)		(1,282)		(8,314)
Total recognized in net periodic benefit cost and
	other comprehensive (income) loss		$	(2,707)	$	472	$	(2,235)

			2017		2016		2015
Net loss (gain) arising during period		$	295	$	(401)	$	(302)
Amortization of actuarial loss in net periodic
	benefit costs		(54)		—		(83)
Total recognized in other comprehensive loss
	(income)		241		(401)		(385)
Total recognized in net periodic benefit cost and
	other comprehensive loss (income)	$	447	$	(249)	$	(90)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

							Other Post-
	Pension Plans						Retirement
	Foreign		Domestic		Total		Benefits
Actuarial loss	$	890	$	2,283	$	3,173	$	58
Prior service (credit) cost		(177)		59		(118)		—
	$	713	$	2,342	$	3,055	$	58

Schedule of Assumptions Used [Table Text Block]

					Other Postretirement
	Pension Benefits				Benefits
	2017		2016		2017		2016
U.S. Plans:
Discount rate	3.44	%	3.88	%	3.39	%	3.73	%
Rate of compensation increase	3.63	%	3.63	%	N/A		N/A

Foreign Plans:
Discount rate	2.31	%	2.17	%	N/A		N/A
Rate of compensation increase	2.89	%	2.48	%	N/A		N/A

						Other Postretirement
		Pension Benefits				Benefits
		2017		2016		2017		2016
U.S. Plans:
Discount rate		3.88	%	4.07	%	3.73	%	3.88	%
Expected long-term return on
	plan assets	7.00	%	7.20	%	N/A		N/A
Rate of compensation increase		3.63	%	3.63	%	N/A		N/A

Foreign Plans:
Discount rate		2.17	%	2.95	%	N/A		N/A
Expected long-term return on
	plan assets	2.12	%	2.65	%	N/A		N/A
Rate of compensation increase		2.48	%	2.41	%	N/A		N/A

		2017		2016
Health care cost trend rate for next year		6.40	%	6.70	%
Rate to which the cost trend rate is assumed to decline (the
	ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches the ultimate trend rate		2037		2037

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

		1% Point		1% Point
		Increase		Decrease
Effect on total service and interest cost	$	16	$	(14)
Effect on postretirement benefit obligations		356		(311)

Schedule of Allocation of Plan Assets [Table Text Block]

Asset Category		Target		2017		2016
U.S. Plans
Equity securities		56	%	59	%	60	%
Debt securities		43	%	40	%	39	%
Other		1	%	1	%	1	%
	Total	100	%	100	%	100	%

Foreign Plans
Equity securities and other		25	%	25	%	24	%
Debt securities		75	%	75	%	76	%
	Total	100	%	100	%	100	%

						Fair Value Measurements at December 31, 2017
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	449		$	449	$	—	$	—
Small capitalization common stock					1,508			1,508		—		—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	1,957		$	1,957	$	—	$	—
Commingled funds measured at NAV					48,527
Pooled separate accounts measured at NAV					1,480
		Total U.S. pension plan assets		$	51,964

Foreign Pension Assets
Cash and cash equivalents				$	26		$	26	$	—	$	—
Insurance contract					82,092			—		—		82,092
Diversified equity securities - registered investment companies					9,002			—		9,002		—
Fixed income - foreign registered investment companies					2,951			—		2,951		—
Real estate - registered investment companies					2,428			—		—		2,428
	Sub-total of foreign pension assets in fair value hierarchy			$	96,499		$	26	$	11,953	$	84,520
Commingled funds measured at NAV					2,123
		Total foreign pension assets		$	98,622

			Total pension assets in fair value hierarchy	$	98,456		$	1,983	$	11,953	$	84,520
			Total pension assets measured at NAV		52,130
			Total pension assets	$	150,586

						Fair Value Measurements at December 31, 2016
				Total			Using Fair Value Hierarchy
U.S. Pension Assets				Fair Value			Level 1		Level 2		Level 3
Cash and cash equivalents				$	302		$	302	$	—	$	—
Small capitalization common stock					1,279			1,279		—		—
	Subtotal U.S. pension plan assets in fair value hierarchy			$	1,581		$	1,581	$	—	$	—
Commingled funds measured at NAV					46,185
Pooled separate accounts measured at NAV					1,431
		Total U.S. pension plan assets		$	49,197

Foreign Pension Assets
Cash and cash equivalents				$	130		$	130	$	—	$	—
Insurance contract					72,778			—		—		72,778
Diversified equity securities - registered investment companies					7,308			—		7,308		—
Fixed income - foreign registered investment companies					2,753			—		2,753		—
Real estate - registered investment companies					2,041			—		—		2,041
	Subtotal foreign pension assets in fair value hierarchy			$	85,010		$	130	$	10,061	$	74,819
Commingled funds measured at NAV					1,834
		Total foreign pension plan assets		$	86,844

			Total pension assets in fair value hierarchy	$	86,591		$	1,711	$	10,061	$	74,819
			Total pension assets measured at NAV		49,450
			Total pension assets	$	136,041

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

			Insurance		Real Estate
			Contract		Fund		Total
Balance as of December 31, 2015		$	62,409	$	2,388	$	64,797
	Purchases		2,584		—		2,584
	Settlements		(1,350)		—		(1,350)
	Unrealized gains		12,005		56		12,061
	Currency translation adjustment		(2,870)		(403)		(3,273)
Balance as of December 31, 2016			72,778		2,041		74,819
	Purchases		2,350		—		2,350
	Settlements		(1,661)		—		(1,661)
	Unrealized (losses) gains		(1,425)		188		(1,237)
	Currency translation adjustment		10,050		199		10,249
Balance as of December 31, 2017		$	82,092	$	2,428	$	84,520

Schedule of Expected Benefit Payments [Table Text Block]

							Other Post-
	Pension Benefits						Retirement
	Foreign		Domestic		Total		Benefits
2018	$	2,205	$	4,473	$	6,678	$	459
2019		2,384		4,420		6,804		441
2020		2,623		4,187		6,810		416
2021		3,322		4,159		7,481		489
2022		3,346		4,165		7,511		364
2023 to 2027		19,491		22,218		41,709		1,502

Other Non-Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Other Liabilities Noncurrent [Abstract]

Schedule of Other Assets and Other Liabilities [Table Text Block]

	2017		2016
Restricted insurance settlement	$	21,171	$	21,883
Non-current income taxes payable		15,825		—
Uncertain tax positions (includes interest and penalties)		7,970		7,933
Deferred and other long-term compensation		5,905		5,550
Other		625		520
Total other non-current liabilities	$	51,496	$	35,886

Equity and Noncontrolling Interest (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

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

						Unrealized Gain (Loss) in
				Defined		Unrealized Gain (Loss) in
		Currency		Benefit		Available-for-
		Translation		Pension		Sale
		Adjustments		Plans		Securities		Total
Balance as of December 31, 2014		$	(14,312)	$	(41,551)	$	1,457	$	(54,406)
	Other comprehensive (loss) income before reclassifications		(24,232)		5,057		(850)		(20,025)
	Amounts reclassified from AOCI		—		3,642		(632)		3,010
	Related tax amounts		—		(2,399)		504		(1,895)
Balance as of December 31, 2015			(38,544)		(35,251)		479		(73,316)
	Other comprehensive (loss) income before reclassifications		(13,711)		(4,229)		834		(17,106)
	Amounts reclassified from AOCI		—		3,075		(17)		3,058
	Related tax amounts		—		237		(280)		(43)
Balance as of December 31, 2016			(52,255)		(36,168)		1,016		(87,407)
	Other comprehensive income (loss) before reclassifications		20,362		(1,646)		2,299		21,015
	Amounts reclassified from AOCI		—		5,154		(2,494)		2,660
	Related tax amounts		—		(1,433)		65		(1,368)
Balance as of December 31, 2017		$	(31,893)	$	(34,093)	$	886	$	(65,100)

Business Acquisitions (Tables)

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

2016 Acquisitions
Current assets (includes cash acquired)		$	3,443
Property, plant and equipment			2,574
Intangibles
	Customer lists and rights to sell		5,041
	Trademarks, formulations and
	product technology		2,543
	Other intangibles		127
Goodwill			3,355
	Total assets purchased		17,083
Current liabilities			(1,198)
Other long-term liabilities			(2,019)
	Total liabilities assumed		(3,217)
	Gross cash paid for acquisition	$	13,866
	Less: cash acquired		105
	Net cash paid for acquisition	$	13,761

Fair Value Measurements (Table)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

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

			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	$	—

			Fair Value Measurements at December 31, 2016
	Total			Using Fair Value Hierarchy
Assets	Fair Value			Level 1		Level 2		Level 3
Company-owned life insurance	$	1,410		$	—	$	1,410	$	—
Total	$	1,410		$	—	$	1,410	$	—

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Operating Lease Maturities [Table Text Block]

2018	$	5,345
2019		4,494
2020		3,708
2021		3,208
2022		2,812
2023 and beyond		8,033

Quarterly Results - Unaudited (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Results (unaudited) [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

			First		Second		Third		Fourth
			Quarter (1)		Quarter (2)		Quarter (3)		Quarter (4)
2017
	Net sales		$	194,909	$	201,183	$	212,918	$	211,072
	Gross profit			70,887		71,835		74,776		73,997
	Operating income			13,758		17,903		14,009		17,074
	Net income (loss) attributable to Quaker Chemical Corporation			6,992		11,906		11,142		(9,762)
	Net income (loss) attributable to Quaker Chemical Corporation
		Common Shareholders - Basic (5)	$	0.53	$	0.90	$	0.84	$	(0.73)
	Net income (loss) attributable to Quaker Chemical Corporation
		Common Shareholders - Diluted (5)	$	0.52	$	0.89	$	0.83	$	(0.73)

2016
	Net sales		$	178,077	$	186,915	$	190,428	$	191,245
	Gross profit			67,981		71,401		70,897		69,831
	Operating income			19,838		22,701		21,863		20,951
	Net income attributable to Quaker Chemical Corporation			12,946		15,015		16,008		17,434
	Net income attributable to Quaker Chemical Corporation
		Common Shareholders - Basic (5)	$	0.98	$	1.13	$	1.21	$	1.31
	Net income attributable to Quaker Chemical Corporation
		Common Shareholders - Diluted (5)	$	0.98	$	1.13	$	1.21	$	1.31

Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Significant Accounting Policies [Abstract]
Revenue Recognized Under Net Reporting Arrangements	$ 44.5	$ 43.5	$ 48.6
Research and Development Expense	$ 23.9	$ 22.5	$ 22.1
Measurement of Tax Benefit, Minimum Likelihood of the Largest Amount Being Realized Upon Ultimate Settlement	50.00%

Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Capitalized Computer Software, Net	$ 1.3	$ 1.4
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	45 years
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	1 year
Software Development [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Software Development [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years

Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2017
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years

Significant Accounting Policies - Concentration Risk (Details)	12 Months Ended
	Dec. 31, 2017
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%

Significant Accounting Policies - Share-Based Compensation (Details)	12 Months Ended
	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	3 years
Forfeiture rate, Nonvested Stock Awards	13.00%
Employee Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	3 years
Options, Maximum Exercisable Life	7 years
Employee Stock Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	1 year
Restricted Stock [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	5 years
Restricted Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	1 year
GAIP Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	5 years
GAIP Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	2 years
Restricted Stock Units (RSUs) [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	5 years
Restricted Stock Units (RSUs) [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Award Vesting Period	1 year

Recently Issued Accounting Standards - Narrative (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Standards Update 201609 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
New Accounting Pronouncement Or Change In Accounting Principle Description	The FASB issued an accounting standard update in March 2016 involving several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, use of a forfeiture rate, and classification on the statement of cash flows. The guidance within this accounting standard update was effective for annual and interim periods beginning after December 15, 2016. When adopted, application of the guidance will vary based on each aspect of the update, including adoption under retrospective, modified retrospective or prospective approaches. Early adoption was permitted. During the first quarter of 2017, the Company adopted the guidance within the accounting standard update as required. The impact of adoption for the Company included the elimination of recording the tax effects of deductions in excess of compensation cost through equity as the guidance in this accounting standard update requires all tax effects related to share-based payments to now be recorded through the income statement. The tax effects of awards are required to be treated as discrete items in the interim reporting period in which the share-based compensation-related tax benefits occur. In addition, when applying the treasury stock method for computing diluted earnings per share, there are no longer assumed proceeds from the share-based compensation-related tax benefits and as a result, there are fewer shares considered to be repurchased in the calculation. This results in an assumption of more incremental shares being issued upon the exercise of share-based payment awards; therefore, equity awards will have a more dilutive effect on earnings per share. As required, the Company has applied these changes in the guidance prospectively, beginning in the first quarter of 2017. The result of these changes was a tax benefit of $1.4 million recorded during the year ended December 31, 2017 and an immaterial number of dilutive shares added to the Company’s earnings per share calculation for the year ended December 31, 2017. In addition, all tax-related cash flows resulting from share-based payments are now required to be reported as operating activities in the statement of cash flows under this new guidance. Either prospective or retrospective transition of this provision was permitted, and the Company has elected to apply the cash flow classification guidance on a prospective basis, consistent with the prospective transition for the treatment of excess tax benefits in the income statement. Lastly, the accounting standard update permitted Companies to make an accounting policy election to account for forfeitures as they occur for service condition aspects of certain share-based awards, rather than estimating forfeitures each period. While permitted, the Company has decided not to elect this accounting policy change, and instead has elected to continue utilizing a forfeiture rate assumption. Based on historical experience, the Company has assumed a forfeiture rate of 13% on certain of its nonvested stock awards.

- Definition

Disclosure related to a new accounting pronouncement or a change in accounting principle, including the nature and reason for the change and the effect of the change on prior periods and the current period.

+ References + Details

Houghton Combination (Details) - USD ($) $ in Millions	12 Months Ended
Houghton Combination (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Business Combination Separately Recognized Transactions [Abstract]
Business Combination Separately Recognized Transactions Description	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. The New Credit Facility includes a $400.0 million multicurrency revolver, a $575.0 million USD term loan and a $175.0 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 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 incurs certain interest costs paid to maintain the banks’ committed capital (“ticking fees”), which began to accrue on September 29, 2017 and bear an interest rate of 0.30% per annum. In addition, the issuance of the Company’s shares at closing of the Combination was subject to approval by Quaker’s shareholders under the rules of the New York Stock Exchange. This approval was received at a meeting of the Company’s shareholders during the third quarter of 2017. Also, the Combination is subject to regulatory approval in the United States, Europe, China and Australia. The Company received regulatory approval from China in July 2017 and from Australia in October 2017. Depending on the remaining regulatory approvals and other customary terms and conditions set forth in the share purchase agreement, the Company currently estimates closing of the Combination to occur during the first half of 2018.
Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Cost Expensed	$ 30.8	$ 1.5
Business Combination Separately Recognized Transactions Liabilities Recognized	$ 5.5	$ 0.5

Segments Table (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Segments Table (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 211,072	$ 212,918	$ 201,183	$ 194,909	$ 191,245	$ 190,428	$ 186,915	$ 178,077	$ 820,082	$ 746,665	$ 737,555
Operating income for reportable segments	165,313				158,895				165,313	158,895	155,367
Segment assets	722,126				692,028				722,126	692,028	680,727
Long-Lived Assets	142,443				137,303				142,443	137,303	140,191
Capital Expenditures									10,872	9,954	11,033
Depreciation									12,477	12,432	12,196
Non Domestic [Member]
Segment Reporting Information [Line Items]
Net sales									49,200	35,800	34,000
Long-Lived Assets	4,900				4,900				4,900	4,900	2,700
North America [Member]
Segment Reporting Information [Line Items]
Net sales									356,598	336,174	344,248
Operating income for reportable segments	77,694				77,833				77,694	77,833	80,239
Segment assets	324,260				321,404				324,260	321,404	317,082
Long-Lived Assets	88,818				86,775				88,818	86,775	87,421
Capital Expenditures									3,919	2,918	4,166
Depreciation									5,791	5,672	5,577
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales									226,243	200,917	179,717
Operating income for reportable segments	35,350				33,810				35,350	33,810	28,236
Segment assets	177,267				147,021				177,267	147,021	162,647
Long-Lived Assets	28,507				25,630				28,507	25,630	27,101
Capital Expenditures									3,936	3,263	3,081
Depreciation									3,368	3,323	2,975
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									201,008	179,131	181,056
Operating income for reportable segments	48,342				45,866				48,342	45,866	45,107
Segment assets	196,891				200,218				196,891	200,218	181,389
Long-Lived Assets	22,427				22,040				22,427	22,040	23,096
Capital Expenditures									2,458	3,269	3,169
Depreciation									2,669	2,765	2,812
South America [Member]
Segment Reporting Information [Line Items]
Net sales									36,233	30,443	32,534
Operating income for reportable segments	3,927				1,386				3,927	1,386	1,785
Segment assets	23,708				23,385				23,708	23,385	19,609
Long-Lived Assets	$ 2,691				$ 2,858				2,691	2,858	2,573
Capital Expenditures									559	504	617
Depreciation									649	672	832
Intersegment Sales Elimination [Member] \| North America [Member]
Segment Reporting Information [Line Items]
Net sales									9,400	8,300	9,100
Intersegment Sales Elimination [Member] \| EMEA [Member]
Segment Reporting Information [Line Items]
Net sales									22,000	18,100	17,800
Intersegment Sales Elimination [Member] \| Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									400	700	1,000
Intersegment Sales Elimination [Member] \| South America [Member]
Segment Reporting Information [Line Items]
Net sales									$ 100	$ 100	$ 100

Segments Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Segments Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation From Segment Totals To Consolidated Abstract
Operating income for reportable segments	$ 165,313				$ 158,895				$ 165,313	$ 158,895	$ 155,367
Non-operating Charges									65,142	65,316	66,999
Restructuring and related activities									0	439	(6,790)
Combination-related expenses									(29,938)	(1,531)	0
Depreciation of corporate assets and amortization									(7,489)	(7,134)	(7,010)
Operating income	$ 17,074	$ 14,009	$ 17,903	$ 13,758	$ 20,951	$ 21,863	$ 22,701	$ 19,838	62,744	85,353	74,568
Interest expense									(3,892)	(2,889)	(2,585)
Interest income									2,534	2,037	1,624
Other expense, net									(718)	(492)	(3,377)
Income before taxes and equity in net income of associated companies									$ 60,668	$ 84,009	$ 70,230

Segments - Product Lines (Details) - Sales Revenue Net [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rolling Lubricants Product Line [Member]
Segment Reporting Information [Line Items]
Concentration Risk Percentage	17.80%	19.00%	18.60%
Machining And Grinding Compounds Product Line [Member]
Segment Reporting Information [Line Items]
Concentration Risk Percentage	15.80%	14.90%	15.30%
Hydraulic Fluids Product Line [Member]
Segment Reporting Information [Line Items]
Concentration Risk Percentage	11.60%	12.00%	12.60%
Corrosion Preventives Product Line [Member]
Segment Reporting Information [Line Items]
Concentration Risk Percentage	11.40%	11.80%	12.00%
Specialty Greases [Member]
Segment Reporting Information [Line Items]
Concentration Risk Percentage	10.00%	10.10%	8.50%

Restructuring Activities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring And Related Activities [Abstract]
Restructuring and related activities		$ 0	$ (439)	$ 6,790
Intangible Assets Reclassified as Held for Sale				$ 300
Restructuring And Related Cost Description		The 2015 Program included provisions for the reduction of total headcount by approximately 65 employees globally. As a result of this program, the Company recognized a $6.8 million restructuring charge in the fourth quarter of 2015. Employee separation costs varied depending on local regulations within certain foreign countries and included severance and other benefits. The Company substantially completed all of the initiatives under the 2015 Program in 2016 and settlement of these charges occurred primarily in 2016 as well. During the fourth quarter of 2016, the Company recognized a restructuring credit of $0.4 million in connection with the 2015 Program, due to customary and routine adjustments to initial estimates for employee separation costs, as well as the reversal of certain accrued employee separation costs as a result of the change in available-for-sale technology, noted above. 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.
Disposal Group Including Discontinued Operation Changes To Plan Of Sale	During the fourth quarter of 2016, the Company made a decision to no longer market or make available-for-sale this technology, which resulted in $0.3 million of other current assets being reclassified back to intangible assets as of December 31, 2016.

Restructuring Activities (Details) - USD ($) $ in Thousands	12 Months Ended
Restructuring Activities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	$ 670	$ 6,303	$ 0
Restructuring and related activities	0	(439)	6,790
Cash Payments	(675)	(5,252)	(490)
Currency Translation Adjustments	(5)	(58)	(3)
Accrued Restructuring, Ending Balance	0	670	6,303
North America [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	196	1,867	0
Restructuring and related activities	(126)	0	2,025
Cash Payments	(70)	(1,671)	(158)
Currency Translation Adjustments	0	0	0
Accrued Restructuring, Ending Balance	0	196	1,867
EMEA [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	474	4,265	0
Restructuring and related activities	126	(439)	4,390
Cash Payments	(605)	(3,404)	(130)
Currency Translation Adjustments	(5)	(52)	(5)
Accrued Restructuring, Ending Balance	0	474	4,265
Asia Pacific [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	0	135	0
Restructuring and related activities	0	0	338
Cash Payments	0	(138)	(202)
Currency Translation Adjustments	0	(3)	1
Accrued Restructuring, Ending Balance	0	0	135
South America [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	0	36	0
Restructuring and related activities	0	0	37
Cash Payments	0	(39)	0
Currency Translation Adjustments	0	(3)	1
Accrued Restructuring, Ending Balance	$ 0	$ 0	$ 36

Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation [Abstract]
Exercised Options, Intrinsic Value	$ 3.4	$ 2.9	$ 0.9
Equity Award Vesting Period	3 years
Share Based Compensation [Line Items]
ESPP: Purchase Price Percentage	85.00%
ESPP: Discount from Market Price	15.00%
ESPP: Maximum Ownership of Outstanding Shares	An employee whose stock ownership of the Company exceeds five percent of the outstanding common stock is not eligible to participate in this plan.
Director Stock Ownership Plan Maximum Number of Shares Authorized Under Plan	75,000
Director Stock Ownership Plan Terms	Under the Plan, each director who, on May 1 of the applicable calendar year, owns less than 400% of the annual cash retainer for the applicable calendar year, divided by the average of the closing price of a share of Quaker Common Stock as reported by the composite tape of the New York Stock Exchange for the previous calendar year (the “Threshold Amount”), is required to receive 75% of the annual cash retainer in Quaker common stock and 25% of the retainer in cash, unless the director elects to receive a greater percentage of Quaker common stock, up to 100% of the annual cash retainer for the applicable year. Each director who owns more than the Threshold Amount may elect to receive common stock in payment of a percentage (up to 100%) of the annual cash retainer.
Director Retainer Annual Fee	$ 0.1
Employee Stock Option [Member]
Share Based Compensation [Line Items]
Weighted Average Remaining Life, Nonvested Stock Awards	1 year 9 months
Restricted Stock [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 2.1
Weighted Average Remaining Life, Nonvested Stock Awards	1 year 7 months
Restricted Stock Units (RSUs) [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	$ 0.2
Weighted Average Remaining Life, Nonvested Stock Awards	1 year 10 months

Share-Based Compensation - Expense Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 4,190	$ 6,349	$ 5,919
Stock Options Compensation Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	958	848	730
Nonvested Stock Awards Compensation Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	2,935	3,121	2,937
Employee Stock Purchase Plan Compensation Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	88	87	75
Matching Stock Contribution 401 K Plan Compensation Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	72	2,124	2,052
Directors Stock Ownership Plan Compensation Expense [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 137	$ 169	$ 125

Share-Based Compensation - Excess Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 0	$ 678	$ 384
Excess tax benefit from stock option exercises	$ 0	$ 678	$ 384

Share-Based Compensation - Option Rollforward (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll [Forward]
Beginning Balance \| shares	117,220
Options Granted \| shares	42,477
Options Exercised \| shares	(48,442)
Ending Balance \| shares	111,255
Options Expected to Vest \| shares	99,484
Options Exerciseable \| shares	11,771
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of year \| $ / shares	$ 75.34
Options Granted \| $ / shares	134.6
Options Exercised \| $ / shares	75.94
Outstanding at End of Period \| $ / shares	97.71
Options Expected to Vest \| $ / shares	100.64
Options Exerciseable \| $ / shares	$ 72.95
Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	5 years 4 months
Weighted Average Remaining Contractual Term, Expected to Vest	5 years 6 months
Weighted Average Remaining Contractual Term, Exercisable	3 years 11 months
Outstanding Options, Intrinsic Value \| $	$ 6,013
Expected to Vest Options, Intrinsic Value \| $	5,086
Exercisable Options, Intrinsic Value \| $	$ 928

Share-Based Compensation - Option Summary (Details)	12 Months Ended
Share-Based Compensation - Option Summary (Details)	Dec. 31, 2017 $ / shares shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of Outstanding Options, Exercise Price Range \| shares	111,255
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	5 years 4 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 97.71
Number of Exercisable Options, Exercise Price Range \| shares	11,771
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 72.95
$30.01 - $40.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	30.01
Exercise Price Range, Upper Range Limit	$ 40
Number of Outstanding Options, Exercise Price Range \| shares	552
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	1 year 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 38.13
Number of Exercisable Options, Exercise Price Range \| shares	552
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 38.13
$40.01 - $50.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	40.01
Exercise Price Range, Upper Range Limit	$ 50
Number of Outstanding Options, Exercise Price Range \| shares	0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 0
Number of Exercisable Options, Exercise Price Range \| shares	0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0
$50.01 - $60.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	50.01
Exercise Price Range, Upper Range Limit	$ 60
Number of Outstanding Options, Exercise Price Range \| shares	874
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	2 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 58.26
Number of Exercisable Options, Exercise Price Range \| shares	874
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 58.26
$60.01 - $70.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	60.01
Exercise Price Range, Upper Range Limit	$ 70
Number of Outstanding Options, Exercise Price Range \| shares	0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 0
Number of Exercisable Options, Exercise Price Range \| shares	7,984
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0
$70.01 - $80.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	70.01
Exercise Price Range, Upper Range Limit	$ 80
Number of Outstanding Options, Exercise Price Range \| shares	52,946
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	5 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 72.21
Number of Exercisable Options, Exercise Price Range \| shares	2,361
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 72.72
$80.01 - $90.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	80.01
Exercise Price Range, Upper Range Limit	$ 90
Number of Outstanding Options, Exercise Price Range \| shares	14,406
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	4 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 87.3
Number of Exercisable Options, Exercise Price Range \| shares	0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 87.3
$90.01 - $130.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	90.01
Exercise Price Range, Upper Range Limit	$ 130
Number of Outstanding Options, Exercise Price Range \| shares	0
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	0 years
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 0
Number of Exercisable Options, Exercise Price Range \| shares	0
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0
$130.01 - $140.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	130.01
Exercise Price Range, Upper Range Limit	$ 140
Number of Outstanding Options, Exercise Price Range \| shares	42,477
Weighted Average Contractual Life, Outstanding Options, Exercise Price Range	6 years 2 months
Weighted Average Exercise Price, Outstanding Options, Exercise Price Range	$ 134.6
Weighted Average Exercise Price, Exercisable Options, Exercise Price Range	$ 0

Share-Based Compensation - Options Grants (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	42,477
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	42,477	67,444	38,698	37,048
Dividend Yield	1.49%	1.49%	1.55%	2.00%
Expected Volatility	25.52%	28.39%	36.32%	43.34%
Risk-free Interest Rate	1.67%	1.08%	1.22%	1.22%
Expected Term (Years)	4 years	4 years	4 years	4 years

Share-Based Compensation - Option Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 4,190	$ 6,349	$ 5,919
Current Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	308	0	0
Unrecognized Compensation Expense, Options	800
Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	332	282	0
Unrecognized Compensation Expense, Options	400
Second Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	276	276	232
Unrecognized Compensation Expense, Options	100
Third Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 42	$ 254	$ 257

Share-Based Compensation - Restricted Stock Rollforward (Details)	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested [Roll Forward]
Beginning Balance \| shares	109,083
Nonvested Stock Awards Granted \| shares	17,315
Nonvested Stock Awards Vested \| shares	(53,749)
Nonvested Stock Awards Forfeited \| shares	(485)
Ending Balance \| shares	72,164
Weighted Average Grant Date Fair Value, Nonvested Stock Awards, Beginning of Period \| $ / shares	$ 76.23
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Granted \| $ / shares	136.18
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Vested \| $ / shares	75.68
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Forfeited \| $ / shares	76.41
Weighted Average Grant Date Fair Value, Nonvested Stock Awards, End of Period \| $ / shares	$ 91.03
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested [Roll Forward]
Beginning Balance \| shares	5,771
Nonvested Stock Awards Granted \| shares	1,332
Nonvested Stock Awards Vested \| shares	(2,702)
Nonvested Stock Awards Forfeited \| shares	(124)
Ending Balance \| shares	4,277
Weighted Average Grant Date Fair Value, Nonvested Stock Awards, Beginning of Period \| $ / shares	$ 78.69
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Granted \| $ / shares	134.6
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Vested \| $ / shares	78.37
Weighted Average Grant Date Fair Value, Nonvested Stock Awards Forfeited \| $ / shares	105.38
Weighted Average Grant Date Fair Value, Nonvested Stock Awards, End of Period \| $ / shares	$ 95.53

Other Income (Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
Other Income (Expense) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Income from Third Party License Fees	$ 861	$ 978	$ 875
Foreign Exchange Gains (Losses), Net	891	172	(1,184)
(Loss) Gain on Fixed Asset Disposals, Net	(79)	50	6
Non-Income Tax Refunds and Other Related Credits	1,015	398	141
Pension And Post Retirement Benefit Costs Nonservice Components	4,234	2,302	3,308
Insurance Solvency Recovery	600	0	0
Other Nonoperating Income	380	338	261
Other Nonoperating Expense	(152)	(126)	(168)
Other Income (Expense), Net	$ (718)	$ (492)	$ (3,377)

Income Taxes - Components of Expense and Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Income Tax Expense (Benefit) [Abstract]
Federal	$ 21,265	$ 4,680	$ 8,924
State	2,529	518	188
Foreign	14,105	12,540	11,074
Current Income Tax Expense (Benefit), Total	37,899	17,738	20,186
Deferred Income Tax Expense (Benefit) [Abstract]
Federal	6,889	4,601	404
State	(36)	104	(16)
Foreign	(3,099)	783	(2,789)
Income Tax Expense (Benefit), Total	41,653	23,226	17,785
Components Of Earnings Before Taxes [Abstract]
Domestic	10,468	31,175	25,219
Foreign	50,200	52,834	45,011
Income before taxes and equity in net income of associated companies	$ 60,668	$ 84,009	$ 70,230

Income Taxes - Deferred Tax Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Retirement benefits	$ 5,472	$ 8,236
Allowance for doubtful accounts	1,134	1,925
Insurance and litigation reserves	497	707
Postretirement benefits	1,056	1,623
Supplemental retirement benefits	2,679	3,670
Performance incentives	3,779	5,197
Equity-based compensation	1,071	2,088
Insurance settlement	4,581	7,755
Operating loss carryforward	8,602	7,343
Foreign tax credit and other credits	3,043	0
Uncertain tax positions	(410)	(101)
Restructuring	0	217
Other	2,816	2,834
Deferred Tax Assets, Gross, Total	34,320	41,494
Valuation allowance	(7,401)	(6,344)
Total deferred income tax assets, net	26,919	35,150
Depreciation	4,444	5,709
Europe Pension and Other	1,295	1,055
Amortization and other	15,373	16,012
Total deferred income tax liabilities	$ 21,112	$ 22,776

Income Taxes - Valuation Allowance Rollforward (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances, Beginning Balance	$ 6,344	$ 6,259	$ 7,345
Additional Valuation Allowance	1,127	294	86
Allowance Utilization and Other	(61)	(187)	(802)
Effect of Exchange Rate Changes	(9)	(22)	(370)
Valuation Allowance, Ending Balance	$ 7,401	$ 6,344	$ 6,259

Income Taxes - Net Deferred Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Taxes on Income and Uncertain Tax Positions [Abstract]
Deferred Tax Assets Net Noncurrent	$ 15,460	$ 24,382
Non-current deferred tax liabilities	9,653	12,008
Deferred Tax Assets, Net, Total	$ 5,807	$ 12,374

Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income Tax Provision at the Federal Statutory Tax Rate	$ 21,229	$ 29,403	$ 24,578
Transition tax	18,388	0	0
Revaluation of deferred tax assets and liabilities	4,470	0	0
Non-deductible acquisition expenses	4,779	696	122
Share-based compensation	(1,419)	0	0
Differences in Tax Rates on Foreign Earnings and Remittances	(2,663)	(2,862)	(5,097)
Foreign Dividends	0	2,939	2,690
Excess Foreign Tax Credit Utilization	(2,761)	(5,493)	(4,141)
Research and Development Activities Credit Utilization	235	238	245
Uncertain Tax Positions	(651)	(833)	226
Domestic Production Activities Deduction	(1,155)	(875)	(910)
State Income Tax Provisions, Net	569	357	133
Non-deductible Entertainment and Business Meals Expense	248	238	249
Miscellaneous Items, Net	854	(106)	180
Income Tax Expense (Benefit), Total	$ 41,653	$ 23,226	$ 17,785

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets, Net	$ 26,919	$ 35,150
Undistributed Earnings of Foreign Subsidiaries	300,000
Income Tax Reconciliation Change In Enacted Tax Rate	$ 18,388	$ 0	$ 0
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate	35.00%
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate	21.00%
U.S. Tax Reform Act	On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (“U.S. Tax Reform”). U.S. Tax Reform includes multiple changes to the U.S. tax code with varying effects on the Company’s 2017 results, including, but not limited to, (i) a revaluation of the Company’s domestic deferred tax assets and liabilities based upon the reduction of the U.S. federal statutory corporate income tax rate from 35% to 21% and (ii) implementing a new system of taxation for non-U.S. earnings which eliminates U.S. federal income taxes on dividends from certain foreign subsidiaries and imposes a one-time transition tax on the deemed repatriation of undistributed earnings of certain foreign subsidiaries that is payable over eight years. U.S. Tax Reform also makes changes to the U.S. tax code that will affect 2018 and future years, including, but not limited to, (i) reduction of the U.S. federal statutory corporate tax rate; (ii) elimination of the corporate alternative minimum tax; (iii) the creation of the base erosion anti-abuse tax, a new minimum tax; (iv) a general elimination of U.S. federal income taxes on dividends from foreign subsidiaries; (v) a new provision designed to tax global intangible low-taxed income (“GILTI”), which allows for the possibility of using foreign tax credits (“FTCs”) and a deduction of up to 50 percent to offset the income tax liability (subject to some limitations); (vi) a new limitation on deductible interest expense; (vii) the repeal of the domestic production activity deduction; (viii) limitations on the deductibility of certain executive compensation; (ix) limitations on the use of FTCs to reduce the U.S. income tax liability; (x) a reduction in the dividends received deduction from 70% to 50% (in the case of less-than-20%-owned subsidiaries), and from 80% to 65% (in the case of less-than-80%-owned subsidiaries); and (xi) limitations on net operating losses (“NOLs”) generated after December 31, 2017, to 80 percent of taxable income. 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 the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to use the applicable accounting guidance on the basis of the provisions of the tax laws that were in effect immediately before the enactment of U.S. Tax Reform. In connection with the Company’s initial analysis of the impact of U.S. Tax Reform, the Company has recorded incremental tax expense of $22.2 million for the year ended December 31, 2017, which includes deferred tax expense of approximately $4.5 million and current tax expense of approximately $17.8 million, net of the impact of eliminating U.S. federal income taxes on dividends from certain foreign subsidiaries in the current year, the details of which are described below. 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. It is possible that the Internal Revenue Service (“IRS”) could issue subsequent guidance or take positions on audit that differ from the Company’s interpretations and assumptions. The Company currently believes subsequent guidance issued or interpretations made by the IRS will not be materially different from the Company’s application of the provisions of U.S. Tax Reform. U.S. Tax Reform reduced the U.S. federal statutory corporate tax rate from 35% to 21%, effective January 1, 2018. Consequently, the Company has recorded a decrease in domestic net deferred tax assets of approximately $4.5 million with a corresponding net adjustment to deferred income tax expense for the year ended December 31, 2017. The deemed repatriation transition tax (“Transition Tax”) is a tax on previously untaxed accumulated and current earnings and profits (“E&P”) of certain of the Company’s foreign subsidiaries. To determine the amount of the Transition Tax, the Company must determine, in addition to other factors, the amount of E&P of its relevant subsidiaries, as well as the amount of non-U.S. income taxes paid on such earnings after 1986. The Company made a reasonable estimate of its Transition Tax and recorded a gross provisional Transition Tax obligation of $18.4 million in its December 31, 2017 financial statements. The Company will elect to pay its Transition Tax in installments over eight years as provided for in U.S. Tax Reform.
Domestic Country [Member]
Deferred Tax Assets, Net	$ 300
Foreign Tax Authority [Member]
Operating Loss Carryforwards	8,900
Operating Loss Carryforwards, Valuation Allowance	800
Foreign Tax Authority [Member] \| Expiration In Next Year [Member]
Operating Loss Carryforwards	200
Foreign Tax Authority [Member] \| Expiration In Year Two [Member]
Operating Loss Carryforwards	300
Foreign Tax Authority [Member] \| Expiration In Year Three [Member]
Operating Loss Carryforwards	100
Foreign Tax Authority [Member] \| Expiration In Year Four [Member]
Operating Loss Carryforwards	200
Foreign Tax Authority [Member] \| Expiration In Year Five [Member]
Operating Loss Carryforwards	100
Foreign Tax Authority [Member] \| Expiration In Year Six [Member]
Operating Loss Carryforwards	$ 800

Income Taxes - Uncertain Tax Positions - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Uncertain Tax Positions [Abstract]
Unrecognized Tax Benefits	$ 6,761	$ 6,240	$ 11,032	$ 11,845
Accrued Interest	600	700
Accrued Penalties	1,000	1,600
Unrecognized Tax Benefits Tax Penalties Income	700	200
Unrecognized Tax Benefits Interest Income On Income Taxes	200	700	200
Unrecognized Tax Benefits, Income Tax Penalties Expense			200
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	2,116	5,744	1,924
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	1,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	1,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 2,200	$ 1,800	$ 1,100
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. The Company has filed for competent authority relief from these assessments under the Mutual Agreement Procedures of the Organization for Economic Co-Operation and Development for all years except 2007.
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2014
Foreign Tax Authority [Member] \| The Netherlands [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2011
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	2013
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] \| Mexico [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2012
Foreign Tax Authority [Member] \| India [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2014
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2008

Income Taxes - Uncertain Tax Positions - Tabular Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 6,240	$ 11,032	$ 11,845
Decrease in unrecognized tax benefits taken in prior periods	(308)	(869)	(416)
Increase in Unrecognized Tax Benefits Taken in Current Period	2,347	1,921	2,512
Decrease in Unrecognized Tax Benefits Due to Lapse of Statute of Limitations	(2,116)	(5,744)	(1,924)
(Decrease) Due to Foreign Exchange Rates		(100)	(985)
Increase Due to Foreign Exchange Rates	598
Unrecognized Tax Benefits, Ending Balance	$ 6,761	$ 6,240	$ 11,032

Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to Quaker Chemical Corporation	$ (9,762)	$ 11,142	$ 11,906	$ 6,992	$ 17,434	$ 16,008	$ 15,015	$ 12,946	$ 20,278	$ 61,403	$ 51,180
Less: Income Allocated to Participating Securities									137	515	443
Net income available to common shareholders									$ 20,141	$ 60,888	$ 50,737
Basic weighted average common shares outstanding									13,204,872	13,136,138	13,199,630
Basic earnings per common share	$ (0.73)	$ 0.84	$ 0.9	$ 0.53	$ 1.31	$ 1.21	$ 1.13	$ 0.98	$ 1.53	$ 4.64	$ 3.84

Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to Quaker Chemical Corporation	$ (9,762)	$ 11,142	$ 11,906	$ 6,992	$ 17,434	$ 16,008	$ 15,015	$ 12,946	$ 20,278	$ 61,403	$ 51,180
Less: income allocated to participating securities									137	514	443
Net income available to common shareholders									$ 20,141	$ 60,889	$ 50,737
Basic weighted average common shares outstanding									13,204,872	13,136,138	13,199,630
Effect of Dilutive Securities									41,074	24,331	15,219
Diluted weighted average common shares outstanding									13,245,946	13,160,469	13,214,849
Diluted earnings per common share	$ (0.73)	$ 0.83	$ 0.89	$ 0.52	$ 1.31	$ 1.21	$ 1.13	$ 0.98	$ 1.52	$ 4.63	$ 3.84

Earnings Per Share - Antidilutive Shares (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Antidilutive Shares	3,671	678	6,684

Accounts Receivable - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts Receivable and Allowance for Doubtful Accounts [Abstract]
Accounts Receivable Gross Current	$ 213,800	$ 202,400
Accounts Receivable Greater Than 90 Days Past Due	15,200	18,000
Business Combination, Acquired Receivables, Estimated Uncollectible	$ 0	100	$ 400
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable Additional Narrative Disclosure	Included in write-offs charged to allowance during the years ended December 31, 2017 and 2016 were outstanding receivables related to certain prior year customer bankruptcies, which the Company previously reserved for, but settled during 2017 and 2016, respectively.
Customer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Doubtful Accounts	$ 0	$ 0	$ 300

- Definition

Further narrative disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables, etc.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5144-111524

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5130-111524

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5066-111524

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107425-111719

+ Details

Allowance For Doubtful Accounts - Rollforward (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 7,220	$ 7,818	$ 6,498
Charged to Costs and Expenses	137	1,375	1,460
Write-Offs Charged to Allowance	(2,206)	(1,949)	(261)
Effect of Exchange Rate Changes	306	(24)	121
Ending Balance	$ 5,457	$ 7,220	$ 7,818

Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Inventories [Abstract]
Raw Materials And Supplies	$ 44,439	$ 37,772
Work-In-Process and Finished Goods	42,782	39,310
Inventories	$ 87,221	$ 77,082

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment Gross Abstract
Land	$ 10,635	$ 9,707
Building and Improvements	87,111	80,740
Machinery and Equipment	153,312	140,595
Construction In Progress	4,932	4,964
Property, Plant and Equipment, Gross, Total	255,990	236,006
Less: Accumulated Depreciation	(169,286)	(150,272)
Property, Plant and Equipment, Net, Total	$ 86,704	$ 85,734

Goodwill Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Goodwill Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill Roll Forward
Goodwill, Beginning Balance	$ 80,804	$ 79,111
Goodwill Additions	1,832	3,197
Goodwill, Translation Adjustments	3,398	(1,504)
Goodwill, Ending Balance	86,034	80,804
North America [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	45,490	42,443
Goodwill Additions	1,832	3,311
Goodwill, Translation Adjustments	249	(264)
Goodwill, Ending Balance	47,571	45,490
EMEA [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	18,189	19,280
Goodwill Additions	0
Goodwill Reductions		(114)
Goodwill, Translation Adjustments	2,315	(977)
Goodwill, Ending Balance	20,504	18,189
Asia Pacific [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	14,566	15,244
Goodwill Additions	0	0
Goodwill, Translation Adjustments	890	(678)
Goodwill, Ending Balance	15,456	14,566
South America [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	2,559	2,144
Goodwill Additions	0	0
Goodwill, Translation Adjustments	(56)	415
Goodwill, Ending Balance	$ 2,503	$ 2,559

Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets Gross [Abstract]
Finite Lived Customer Lists, Gross	$ 76,581	$ 71,454
Trademarks, Formulations And Product Technology	33,025	31,436
Other Finite Lived Intangible Assets, Gross	6,114	6,023
Total	115,720	108,913
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Accumulated Amortization	45,217	36,942
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Accumulated Amortization	25,394	20,043
Trademarks Formulations And Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Accumulated Amortization	14,309	11,748
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Accumulated Amortization	$ 5,514	$ 5,151

Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization	$ 7,368	$ 7,009	$ 6,811

Intangible Assets - Future Amortization (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
For the Year ended December 31, 2018	$ 7,348
For the Year ended December 31, 2019	7,244
For the Year ended December 31, 2020	6,956
For the Year ended December 31, 2021	6,576
For the Year ended December 31, 2022	$ 6,449

Intangible Assets - Indefinite Lived (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Indefinite Lived Intangible Assets Excluding Goodwill [Abstract]
Indefinite Lived Trademarks	$ 1.1	$ 1.1

Investment in Associated Companies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Equity Method Investments [Line Items]
Equity Method Investments			$ 25,690	$ 22,817
Noncontrolling Interest Increase From Subsidiary Equity Issuance				$ 73
Nippon Quaker (Japan) [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage			50.00%
Nippon Quaker (Japan) [Member] \| Asia Pacific [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investments			$ 5,700
Kelko (Venezuela) [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage			50.00%
Currency Conversion Adjustment	$ 100	$ 2,800	$ 400
Kelko (Venezuela) [Member] \| South America [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investments			$ 100
Kelko (Panama) [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage			50.00%
Kelko (Panama) [Member] \| South America [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investments			$ 400
Primex (Barbados) [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage			33.00%
Primex (Barbados) [Member] \| North America [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investments			$ 19,500

Investments in Associated Companies - Summarized Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Manufacturing And Services [Member]
Equity Method Investment Summarized Financial Information Abstract
Current Assets	$ 37,683	$ 37,998
Non-current Assets	936	1,244
Current Liabilities	24,858	26,683
Non-current Liabilities	1,457	1,166
Equity Method Investment Summarized Financial Information Income Statement [Abstract]
Revenue	42,555	41,448	$ 40,282
Gross Profit	13,440	13,082	12,887
Income Before Income Taxes	2,900	2,289	(2,843)
Net Income	1,471	1,210	(3,631)
Captive Insurance Company [Member]
Equity Method Investment Summarized Financial Information Abstract
Total Assets	120,154	116,742
Total Liabilities	54,258	58,775
Equity Method Investment Summarized Financial Information Income Statement [Abstract]
Revenue	14,042	5,632	7,058
Income Before Income Taxes	11,705	5,622	8,407
Net Income	$ 7,788	$ 5,148	$ 6,334

Investments in Associated Companies - Foreign Currency (Details) - / $	Dec. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014
CADIVI [Member]
Schedule Of Foreign Currency [Line Items]
Venezuela Currency Exchange Rate				6.3
SIMADI [Member]
Schedule Of Foreign Currency [Line Items]
Venezuela Currency Exchange Rate			193
DIPRO [Member]
Schedule Of Foreign Currency [Line Items]
Venezuela Currency Exchange Rate		10
DICOM [Member]
Schedule Of Foreign Currency [Line Items]
Venezuela Currency Exchange Rate	3,341

Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Assets [Abstract]
Restricted Insurance Settlement	$ 21,171	$ 21,883
Uncertain Tax Positions	4,543	3,892
Supplemental Retirement Income Program	1,594	1,410
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent	1,184	0
Other	1,557	1,567
Total	$ 30,049	$ 28,752

Other Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Other Assets - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Loss Contingency, Settlement Agreement, Terms	Previously, an inactive subsidiary of the Company executed separate settlement and release agreements with two of its insurance carriers for $35.0 million, of which $21.2 million remains. 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.
Interest Earned, Restricted Cash	$ 100	$ 100
Payments Made, Restricted Cash	$ 762	$ 1,023	$ 760

Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Current Liabilities [Abstract]
Non-Income Taxes	$ 9,196	$ 9,278
Professional Fees	5,019	1,980
Selling Expenses	2,846	2,699
Customer Advances	1,507	492
Freight	1,780	2,212
Legal	1,169	754
Accrued Interest	884	5
Current Income Taxes Payable	841	2,753
Accrued Rent and Facilities	775	500
Other	3,304	2,755
Accrued Liabilities, Current, Total	$ 27,321	$ 23,428

Debt - Table (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt [Abstract]
Credit facilities	$ 48,514	$ 47,948
Industrial development bonds	15,000	15,000
Municipality-Related Loans	3,290	3,470
Other debt obligations (including capital leases)	0	58
Debt And Capital Lease Obligations	66,804	66,476
Short-term Debt (including capital leases)	0	(58)
Current portion of long-term debt	(5,736)	(649)
Long-term Debt and Capital Lease Obligations	$ 61,068	$ 65,769

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Debt - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Debt - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Line Of Credit	$ 48,514	$ 47,948
Line of Credit, Current Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	300,000
Line Of Credit Facility Maximum Borrowing Capacity	$ 400,000
Line Of Credit Maturity Date	2019-06
Line of Credit Facility, Covenant Compliance	As of December 31, 2017 and 2016, the Company’s consolidated net 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, Covenant Terms	The Credit Facility has certain financial and other covenants, with the key financial covenant requiring that the Company’s consolidated net debt to adjusted EBITDA ratio cannot exceed 3.50 to 1.
Long-term Debt, Weighted Average Interest Rate	1.88%	1.25%
Ohio Department Of Development [Member]
Debt Instrument [Line Items]
Carrying Amount of Long-Term Debt	$ 1,100	$ 1,500
Ohio Department of Development Term Loan	$ 3,500
Principal Repayment Commencement Date	2010-09
Debt Instrument Interest Rate Stated Percentage	2.00%
Debt Instrument Interest Rate Stated Percentage In Year Four	3.00%
Industrial Development Bond Due 2018 [Member]
Debt Instrument [Line Items]
Carrying Amount of Long-Term Debt	$ 5,000
Debt Instrument Interest Rate Stated Percentage	5.60%
Industrial Development Bond Due 2028 [Member]
Debt Instrument [Line Items]
Carrying Amount of Long-Term Debt	$ 10,000
Debt Instrument Interest Rate Stated Percentage	5.26%
Local Government Loans [Member]
Debt Instrument [Line Items]
Carrying Amount of Long-Term Debt	$ 2,200	$ 2,000

Debt - Maturity Schedules (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Long Term Debt By Maturity Abstract
2018	$ 5,736
2019	49,160
2020	694
2021	407
2022	$ 282

Pension and Other Postretirement Benefits - Funded Status Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	$ 136,041
Fair Value of Plan Assets at End of Year		$ 136,041
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Non-current Asset	1,184	0
Domestic [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	49,197
Fair Value of Plan Assets at End of Year		49,197
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	67,254	66,862
Service Cost	337	298	$ 250
Interest Cost	1,932	2,114	2,541
Employee Contributions	0	0
Benefits Paid	(4,031)	(4,522)
Plan Settlements	(4,341)	0
Plan Expense and Premiums Paid	0	(275)
Actuarial (gain) Loss	1,826	2,777
Translation Difference and Other	0	0
Benefit Obligation at End of Year	62,977	67,254	66,862
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	49,197	46,701
Actual Return on Plan Assets	6,865	2,516
Employer Contributions	4,574	4,777
Employee Contributions	0	0
Benefits Paid	(4,031)	(4,522)
Plan Settlements	(4,341)	0
Plan Expenses and Premiums Paid	(300)	(275)
Translation Difference	0	0
Fair Value of Plan Assets at End of Year	51,964	49,197	46,701
Defined Benefit Plan, Funded Status of Plan	(11,013)	(18,057)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Non-current Asset	1,184	0
Current Liabilities	(560)	(574)
Non-current Liabilities	(11,637)	(17,483)
Net Amount Recognized	(11,013)	(18,057)
Amounts Not Yet Reflected in Net Periodic Benefit Costs and Included in Accumulated Other Comprehensive Income (Loss) [Abstract]
Prior Service credit (cost)	(59)	(122)
Accumulated Loss	(27,133)	(33,147)
Accumulated Other Comprehensive Loss ("AOCI")	(27,192)	(33,269)
Cumulative Employer Contributions In Excess Of (or Below) Net Periodic Benefit Cost	16,179	15,212
Net Amount Recognized	(11,013)	(18,057)
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	4,730	5,422
Service Cost	8	10	17
Interest Cost	144	142	195
Employee Contributions	0	0
Benefits Paid	(448)	(443)
Plan Settlements	0	0
Plan Expense and Premiums Paid	0	0
Actuarial (gain) Loss	295	(401)
Translation Difference and Other	0	0
Benefit Obligation at End of Year	4,729	4,730	5,422
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	0	0
Actual Return on Plan Assets	0	0
Employer Contributions	448	443
Employee Contributions	0	0
Benefits Paid	(448)	(443)
Plan Settlements	0	0
Plan Expenses and Premiums Paid	0	0
Translation Difference	0	0
Fair Value of Plan Assets at End of Year	0	0	0
Defined Benefit Plan, Funded Status of Plan	(4,729)	(4,730)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Non-current Asset	0	0
Current Liabilities	(459)	(451)
Non-current Liabilities	(4,270)	(4,279)
Net Amount Recognized	(4,729)	(4,730)
Amounts Not Yet Reflected in Net Periodic Benefit Costs and Included in Accumulated Other Comprehensive Income (Loss) [Abstract]
Prior Service credit (cost)	0	0
Accumulated Loss	(823)	(581)
Accumulated Other Comprehensive Loss ("AOCI")	(823)	(581)
Cumulative Employer Contributions In Excess Of (or Below) Net Periodic Benefit Cost	(3,906)	(4,149)
Net Amount Recognized	(4,729)	(4,730)
Foreign [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	86,844
Fair Value of Plan Assets at End of Year		86,844
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	103,491	92,406
Service Cost	3,219	2,378	2,799
Interest Cost	2,066	2,314	2,476
Employee Contributions	68	71
Benefits Paid	(2,503)	(1,583)
Plan Settlements	0	0
Plan Expense and Premiums Paid	(210)	(155)
Actuarial (gain) Loss	(1,164)	14,848
Translation Difference and Other	13,385	(6,788)
Benefit Obligation at End of Year	118,352	103,491	92,406
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	86,844	76,156
Actual Return on Plan Assets	116	14,472
Employer Contributions	2,867	3,103
Employee Contributions	68	71
Benefits Paid	(2,503)	(1,583)
Plan Settlements	0	0
Plan Expenses and Premiums Paid	(210)	(155)
Translation Difference	11,440	(5,220)
Fair Value of Plan Assets at End of Year	98,622	86,844	76,156
Defined Benefit Plan, Funded Status of Plan	(19,730)	(16,647)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Non-current Asset	0	0
Current Liabilities	(89)	(61)
Non-current Liabilities	(19,641)	(16,586)
Net Amount Recognized	(19,730)	(16,647)
Amounts Not Yet Reflected in Net Periodic Benefit Costs and Included in Accumulated Other Comprehensive Income (Loss) [Abstract]
Prior Service credit (cost)	1,744	1,687
Accumulated Loss	(22,598)	(20,214)
Accumulated Other Comprehensive Loss ("AOCI")	(20,854)	(18,527)
Cumulative Employer Contributions In Excess Of (or Below) Net Periodic Benefit Cost	1,124	1,880
Net Amount Recognized	(19,730)	(16,647)
Pension Plans, Defined Benefit [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at Beginning of Year	170,745	159,268
Service Cost	3,556	2,676	3,049
Interest Cost	3,998	4,428	5,017
Employee Contributions	68	71
Benefits Paid	(6,534)	(6,105)
Plan Settlements	(4,341)	0
Plan Expense and Premiums Paid	(210)	(430)
Actuarial (gain) Loss	662	17,625
Translation Difference and Other	13,385	(6,788)
Benefit Obligation at End of Year	181,329	170,745	159,268
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at Beginning of Year	136,041	122,857
Actual Return on Plan Assets	6,981	16,988
Employer Contributions	7,441	7,880
Employee Contributions	68	71
Benefits Paid	(6,534)	(6,105)
Plan Settlements	4,341	0
Plan Expenses and Premiums Paid	(510)	(430)
Translation Difference	11,440	(5,220)
Fair Value of Plan Assets at End of Year	150,586	136,041	$ 122,857
Defined Benefit Plan, Funded Status of Plan	(30,743)	(34,704)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Non-current Asset	1,184	0
Current Liabilities	(649)	(635)
Non-current Liabilities	(31,278)	(34,069)
Net Amount Recognized	(30,743)	(34,704)
Amounts Not Yet Reflected in Net Periodic Benefit Costs and Included in Accumulated Other Comprehensive Income (Loss) [Abstract]
Prior Service credit (cost)	1,685	1,565
Accumulated Loss	(49,731)	(53,361)
Accumulated Other Comprehensive Loss ("AOCI")	(48,046)	(51,796)
Cumulative Employer Contributions In Excess Of (or Below) Net Periodic Benefit Cost	17,303	17,092
Net Amount Recognized	$ (30,743)	$ (34,704)

Pension and Other Postretirement Benefits - Information About Accumulated and Projected Benefit Obligations In Excess of Plan Assets (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	$ 130,549	$ 170,745
Accumulated Benefit Obligation	125,525	167,139
Fair Value of Plan Assets	98,622	136,041
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	130,549	170,745
Fair Value of Plan Assets	98,622	136,041
Domestic [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	12,197	67,254
Accumulated Benefit Obligation	11,456	66,676
Fair Value of Plan Assets	0	49,197
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	12,197	67,254
Fair Value of Plan Assets	0	49,197
Foreign [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	118,352	103,491
Accumulated Benefit Obligation	114,069	100,463
Fair Value of Plan Assets	98,622	86,844
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	118,352	103,491
Fair Value of Plan Assets	$ 98,622	$ 86,844

Pension and Other Postretirement Benefits - Net Periodic Benefit Cost and Changes in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	$ 337	$ 298	$ 250
Interest Cost	1,932	2,114	2,541
Expected Return on Plan Assets	(3,067)	(3,316)	(3,453)
Settlement Loss	1,946	0	0
Actuarial Loss Amortization	2,396	2,336	2,353
Prior Service (Credit) Cost Amortization	63	63	63
Net Periodic Benefit Cost	3,607	1,495	1,754
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Loss (Gain) Arising During The Period	(1,672)	3,576	1,134
Prior Service (Credit) Cost Amortization	(63)	(63)	(63)
Actuarial Loss	(4,342)	(2,336)	(2,353)
Foreign Currency Exchange Rate Changes	0	0	0
Total Recognized in Other Comprehensive (Income) Loss	(6,077)	1,177	(1,282)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Loss Or (Income)	(2,470)	2,672	472
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	8	10	17
Interest Cost	144	142	195
Actuarial Loss Amortization	54	0	83
Net Periodic Benefit Cost	206	152	295
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Loss (Gain) Arising During The Period	295	(401)	(302)
Actuarial Loss	(54)	0	(83)
Total Recognized in Other Comprehensive (Income) Loss	241	(401)	(385)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Loss Or (Income)	447	(249)	(90)
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	3,219	2,378	2,799
Interest Cost	2,066	2,314	2,476
Expected Return on Plan Assets	(1,994)	(2,026)	(2,092)
Settlement Loss	0	0	170
Actuarial Loss Amortization	862	839	1,136
Prior Service (Credit) Cost Amortization	(167)	(164)	(164)
Net Periodic Benefit Cost	3,986	3,341	4,325
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Loss (Gain) Arising During The Period	715	2,401	(3,537)
Prior Service (Credit) Cost Amortization	167	164	164
Actuarial Loss	(862)	(839)	(1,306)
Foreign Currency Exchange Rate Changes	2,308	(1,347)	(2,353)
Total Recognized in Other Comprehensive (Income) Loss	2,328	379	(7,032)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Loss Or (Income)	6,314	3,720	(2,707)
Pension Plans, Defined Benefit [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service Cost	3,556	2,676	3,049
Interest Cost	3,998	4,428	5,017
Expected Return on Plan Assets	(5,061)	(5,342)	(5,545)
Settlement Loss	1,946	0	170
Actuarial Loss Amortization	3,258	3,175	3,489
Prior Service (Credit) Cost Amortization	(104)	(101)	(101)
Net Periodic Benefit Cost	7,593	4,836	6,079
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net Loss (Gain) Arising During The Period	(957)	5,977	(2,403)
Prior Service (Credit) Cost Amortization	104	101	101
Actuarial Loss	(5,204)	(3,175)	(3,659)
Foreign Currency Exchange Rate Changes	2,308	(1,347)	(2,353)
Total Recognized in Other Comprehensive (Income) Loss	(3,749)	1,556	(8,314)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Loss Or (Income)	$ 3,844	$ 6,392	$ (2,235)

Pension and Other Postretirement Benefits - Amounts to be Amortized From AOCI Over Next Fiscal Year (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	$ 3,173
Prior Service (Credit) Cost	(118)
Total	3,055
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	2,283
Prior Service (Credit) Cost	59
Total	2,342
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	(58)
Prior Service (Credit) Cost	0
Total	58
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	890
Prior Service (Credit) Cost	(177)
Total	$ 713

Pension and Other Postretirement Benefits - Assumptions Used in Determining Benefit Obligations and Net Periodic Pension Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health Care Cost Trend Rate For Next Year	6.40%	6.70%
Rate to Which the Cost Trend Rate is Assumed to Decline (Ultimate Trend Rate)	4.50%	4.50%
Year that Rate Reaches Ultimate Trend Rate	2037	2037
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect of One Percentage Point Increase on Service and Interest Cost Components	$ 16
Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	356
Effect of One Percentage Point Decrease on Service and Interest Cost Components	(14)
Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$ (311)
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount Rate	3.44%	3.88%
Rate of Compensation Increase	3.63%	3.63%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate	3.88%	4.07%
Expected Long-Term Return on Plan Assets	7.00%	7.20%
Rate of Compensation Increase	3.63%	3.63%
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount Rate	3.39%	3.73%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate	3.73%	3.88%
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount Rate	2.31%	2.17%
Rate of Compensation Increase	2.89%	2.48%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate	2.17%	2.95%
Expected Long-Term Return on Plan Assets	2.12%	2.65%
Rate of Compensation Increase	2.48%	2.41%

Pension and Other Postretirement Benefits - Asset Allocations (Details) - Pension Plans, Defined Benefit [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
Concentration Risk Percentage	3.00%	3.00%
Domestic [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	56.00%
Actual Plan Asset Allocations	59.00%	60.00%
Domestic [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	43.00%
Actual Plan Asset Allocations	40.00%	39.00%
Domestic [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	1.00%
Actual Plan Asset Allocations	1.00%	1.00%
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
Foreign [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	25.00%
Actual Plan Asset Allocations	25.00%	24.00%
Foreign [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	75.00%
Actual Plan Asset Allocations	75.00%	76.00%

Pension and Other Postretirement Benefits - Level 3 Asset Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	$ 136,041
Fair Value of Plan Assets at End of Year		$ 136,041
Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	74,819
Purchases	2,350	2,584
Settlements	(1,661)	(1,350)
Unrealized Gains	(1,237)	12,061
Translation Difference	10,249	(3,273)
Fair Value of Plan Assets at End of Year	84,520	74,819
Insurance Contract [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Purchases	2,350	2,584
Settlements	(1,661)	(1,350)
Unrealized Gains	(1,425)	12,005
Translation Difference	10,050	(2,870)
Real Estate Fund [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	2,041
Purchases	0	0
Settlements	0	0
Unrealized Gains	188	56
Translation Difference	$ 199	(403)
Fair Value of Plan Assets at End of Year		$ 2,041

Pension and Other Postretirement Benefits - Cash Flow (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	$ 9,900
Expected Benefit Payments, Next Twelve Months	6,678
Expected Benefit Payments, Year Two	6,804
Expected Benefit Payments, Year Three	6,810
Expected Benefit Payments, Year Four	7,481
Expected Benefit Payments, Year Five	7,511
Expected Benefit Payments, Five Fiscal Years Thereafter	41,709
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	4,600
Expected Benefit Payments, Next Twelve Months	4,473
Expected Benefit Payments, Year Two	4,420
Expected Benefit Payments, Year Three	4,187
Expected Benefit Payments, Year Four	4,159
Expected Benefit Payments, Year Five	4,165
Expected Benefit Payments, Five Fiscal Years Thereafter	22,218
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	400
Expected Benefit Payments, Next Twelve Months	459
Expected Benefit Payments, Year Two	441
Expected Benefit Payments, Year Three	416
Expected Benefit Payments, Year Four	489
Expected Benefit Payments, Year Five	364
Expected Benefit Payments, Five Fiscal Years Thereafter	1,502
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	5,300
Expected Benefit Payments, Next Twelve Months	2,205
Expected Benefit Payments, Year Two	2,384
Expected Benefit Payments, Year Three	2,623
Expected Benefit Payments, Year Four	3,322
Expected Benefit Payments, Year Five	3,346
Expected Benefit Payments, Five Fiscal Years Thereafter	$ 19,491

Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension and Other Postretirement Benefits [Abstract]
Value of Employer Securities Included in Plan Assets	$ 1,500	$ 1,300
Defined Benefit Plan Disclosure [Line Items]
Prior Service Cost Charge	$ 4,000
Description of Defined Contribution Plan	The Company has a 401(k) plan with an employer match covering a majority of its domestic employees. The plan allows for and the Company previously paid a nonelective contribution on behalf of participants who have completed one year of service equal to 3% of the eligible participants’ compensation in the form of Company common stock.
Non-elective Match Percentage	3.00%
Total Contribution Amount	$ 2,900	2,700	$ 2,600
Defined Benefit Plan Explanation Of Significant Change In Benefit Obligation Or Plan Assets Not Apparent From Other Required Disclosures	During the second quarter of 2017, the Company’s U.S. pension plan 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 the year ended December 31, 2017, the Company recorded a settlement charge of approximately $1.9 million. This settlement charge represented 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.
Defined Benefit Plan Other Costs	$ 4,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	176,300	167,100
Domestic [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 62,200	$ 66,700
Commingled Fund Asset Allocation	As of December 31, 2017, the U.S. pension plan commingled funds included approximately 60 percent of investments in equity securities and 40 percent of investments in fixed income securities.
Percentage of domestic pension assets	3.00%	3.00%
Net Periodic Benefit Cost	$ 3,607	$ 1,495	1,754
Domestic [Member] \| Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	206	152	295
Domestic [Member] \| Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	1,400	900	900
Foreign [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 114,100	100,400
Commingled Fund Asset Allocation	As of December 31, 2017, foreign pension plan commingled funds included approximately 31 percent of investments in equity securities, 57 percent of investments in fixed income securities, and 12 percent of other non-related investments, primarily real estate.
Net Periodic Benefit Cost	$ 3,986	$ 3,341	$ 4,325

Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Noncurrent [Abstract]
Restricted Insurance Settlements	$ 21,171	$ 21,883
Non-current income taxes payable	15,825	0
Uncertain Tax Positions (Includes Interest and Penalties)	7,970	7,933
Deferred And Other Long-Term Compensation	5,905	5,550
Other	625	520
Total	$ 51,496	$ 35,886

Equity and Noncontrolling Interest - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity Class Of Treasury Stock [Line Items]
Common Stock Par Value	$ 1	$ 1
Common Stock Shares Authorized	30,000,000	30,000,000
Common Stock Shares, Issued	13,307,976	13,277,832
Shares issued for equity based comp plans	20,915
Shares issued for ESPP	4,091
Shares issued for Options exercise and Other activity	4,878
Common Stock Voting Rights	Prior to September 7, 2017, the Company’s Articles of Incorporation included a time-based voting system that granted special ten-for-one-voting rights to shareholders who had beneficially owned their Quaker Chemical Corporation common stock continuously for a period of at least 36 consecutive calendar months (dating from the first day of the first full calendar month on or after the date the holder acquired beneficial ownership of such common stock) before the record date for a shareholder vote. At a meeting of the Company’s shareholders on September 7, 2017, the Company’s shareholders approved an amendment of the Company’s Articles of Incorporation that provides that every holder of Quaker Chemical Corporation common stock will be entitled to one vote for each share of common stock of the Company.
Preferred Stock Shares Authorized	10,000,000
Preferred Stock Par Or Stated Value Per Share	$ 1
Payments For Repurchase Of Common Stock	$ 0	$ 5,859	$ 7,276
2015 Share Repurchase [Member]
Equity Class Of Treasury Stock [Line Items]
Stock Repurchase Program Authorized Amount	$ 100,000	$ 100,000	$ 100,000
Stock Repurchased And Retired During Period Shares	0	83,879	87,386
Payments For Repurchase Of Common Stock	$ 0	$ 5,900	$ 7,300
Cost of Sales [Member]
Concentration Risk [Line Items]
Percentage of domestic pension assets	25.00%	25.00%	25.00%
Operating Expense [Member]
Concentration Risk [Line Items]
Percentage of domestic pension assets	75.00%	70.00%	70.00%

Equity and Noncontrolling Interest - AOCI Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ (87,407)	$ (73,316)	$ (54,406)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	21,015	(17,106)	(20,025)
Amounts Reclassed from AOCI	2,660	3,058	3,010
Related Tax Amounts	(1,368)	(43)	(1,895)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(65,100)	(87,407)	(73,316)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(52,255)	(38,544)	(14,312)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	20,362	(13,711)	(24,232)
Amounts Reclassed from AOCI	0	0	0
Related Tax Amounts	0	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(31,893)	(52,255)	(38,544)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(36,168)	(35,251)	(41,551)
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	(1,646)	(4,229)	5,057
Amounts Reclassed from AOCI	5,154	3,075	3,642
Related Tax Amounts	(1,433)	237	(2,399)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(34,093)	(36,168)	(35,251)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	1,016	479	1,457
Other Comprehensive (Loss) Income, before Reclassifications, before Tax	2,299	834	(850)
Amounts Reclassed from AOCI	(2,494)	(17)	(632)
Related Tax Amounts	65	(280)	504
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 886	$ 1,016	$ 479

Business Acquisitions - Table (Details) $ in Thousands, € in Millions, kr in Millions, $ in Millions	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 AUD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 AUD ($)	Dec. 31, 2014 SEK (kr)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Finite Lived Customer Lists, Gross	$ 76,581	$ 71,454
Other Finite Lived Intangible Assets, Gross	6,114	6,023
Goodwill	$ 86,034	80,804			$ 79,111
Mining [Member]
Business Acquisition [Line Items]
Present Value of Holdback				$ (0.3)	$ (200)
Business Acquisition, Cost of Acquired Entity, Purchase Price			$ 1,900					$ 2.9		$ 2,400
Binol [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price									kr 136.5	$ 18,500
Verkol [Member]
Business Acquisition [Line Items]
Long-term Debt						€ (2.2)	$ (2,400)
Cash Acquired						14.1	15,400
Business Acquisition, Cost of Acquired Entity, Purchase Price						€ 37.7	$ 41,400
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Current Assets		3,443
Propery, Plant & Equipment		2,574
Finite Lived Customer Lists, Gross		5,041
Finite Lived Trademarks, Gross		2,543
Other Finite Lived Intangible Assets, Gross		127
Goodwill		3,355
Total Assets Purchased		17,083
Other Current Liabilities		(1,198)
Other Non-Current Liabilities		(2,019)
Total Liabilities Assumed		(3,217)
Business Acquisition, Cost of Acquired Entity, Purchase Price, Gross		13,866
Cash Acquired		105
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 13,761

Business Acquisitions - Narrative (Details) $ in Thousands, € in Millions, ₨ in Millions, kr in Millions, $ in Millions, $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2017 USD ($)	Jun. 30, 2017 CAD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Mar. 31, 2015 SEK (kr)	Mar. 31, 2015 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 INR (₨)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 CAD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 AUD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 AUD ($)	Dec. 31, 2014 SEK (kr)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Goodwill												$ 86,034			$ 80,804			$ 79,111
Contingent Consideration Paid									$ 0	$ 226
Business Combination Transaction-related Expenses								$ 30,800	$ 1,500
Mining [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions																$ 1,900					$ 2.9		$ 2,400
Present Value of Holdback																	$ 0.3	$ 200
Binol [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions																						kr 136.5	$ 18,500
Post Closing Adjustment						kr 4.4	$ 500
Verkol [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions																			€ 37.7	$ 41,400
Long-term Debt																			(2.2)	(2,400)
Post Closing Adjustment			€ 1.3	$ 1,400
Cash Acquired																			€ 14.1	$ 15,400
Business Combination Transaction-related Expenses					$ 2,800
Lubricor [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions														$ 16.0	$ 12,000
Metal Working North America [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions		$ 7.3											$ 5,400
Other Assets Current													600
Goodwill													1,800
Intangibles													$ 3,000
Metal Working North America [Member] \| Customer Lists [Member]
Business Acquisition [Line Items]
Intangible Assets, Amortizable Life		10 years
Metal Working North America [Member] \| Noncompete Agreements [Member]
Business Acquisition [Line Items]
Intangible Assets, Amortizable Life		5 years
Metal Working North America [Member] \| Trademarks Formulations And Product Technology [Member]
Business Acquisition [Line Items]
Intangible Assets, Amortizable Life		15 years
India [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions											₨ 2,025.0	$ 31,800
Percentage of Voting Interests Acquired											45.00%	45.00%
Adjustments To Additional Paid In Capital Other	$ 21,200

Fair Value - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	$ 1,594	$ 1,410
Assets Fair Value Disclosure	1,594	1,410
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	1,594	1,410
Assets Fair Value Disclosure	1,594	1,410
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 - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Unrelated Environmental Liability Accruals	$ 200,000	$ 200,000
Loss Contingency, Settlement Agreement, Terms	Previously, an inactive subsidiary of the Company executed separate settlement and release agreements with two of its insurance carriers for $35.0 million, of which $21.2 million remains. 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	$ 1,000,000
ACP [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	100,000
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 1,900,000
Loss Contingency, Settlement Agreement, Terms	In response, two of the three carriers entered into separate settlement and release agreements with the subsidiary in 2005 and 2007 for $15.0 million and $20.0 million, respectively. 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. In 2007, the subsidiary and the remaining primary insurance carrier entered into a Claim Handling and Funding Agreement, under which the carrier is paying 27% of defense and indemnity costs incurred by or on behalf of the subsidiary in connection with asbestos bodily injury claims. The agreement continues until terminated and can only be terminated by either party by providing a minimum of two years prior written notice. As of December 31, 2017, no notice of termination has been given under this agreement. At the end of the term of the agreement, the subsidiary may choose to again pursue its claim against this insurer regarding the application of the policy limits.

Commitments and Contingencies - Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 6,400	$ 5,600	$ 5,900
Future Operating Lease Minimum Payments, Due Next Year	5,345
Future Operating Lease Minimum Payments, Due in Two Years	4,494
Future Operating Lease Minimum Payments, Due in Three Years	3,708
Future Operating Lease Minimum Payments, Due in Four Years	3,208
Future Operating Lease Minimum Payments, Due in Five Years	2,812
Future Operating Lease Minimum Payments, Due Therafter	$ 8,033

Quarterly Results - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Results (unaudited) [Abstract]
Net sales	$ 211,072	$ 212,918	$ 201,183	$ 194,909	$ 191,245	$ 190,428	$ 186,915	$ 178,077	$ 820,082	$ 746,665	$ 737,555
Gross Profit	73,997	74,776	71,835	70,887	69,831	70,897	71,401	67,981
Operating income	17,074	14,009	17,903	13,758	20,951	21,863	22,701	19,838	62,744	85,353	74,568
Net income attributable to Quaker Chemical Corporation	$ (9,762)	$ 11,142	$ 11,906	$ 6,992	$ 17,434	$ 16,008	$ 15,015	$ 12,946	$ 20,278	$ 61,403	$ 51,180
Net income attributable to Quaker Chemical Corporation Common Shareholders - basic	$ (0.73)	$ 0.84	$ 0.9	$ 0.53	$ 1.31	$ 1.21	$ 1.13	$ 0.98	$ 1.53	$ 4.64	$ 3.84
Net income attributable to Quaker Chemical Corporation Common Shareholders - diluted	$ (0.73)	$ 0.83	$ 0.89	$ 0.52	$ 1.31	$ 1.21	$ 1.13	$ 0.98	$ 1.52	$ 4.63	$ 3.84

Quarterly Results - Unaudited - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Captive Insurance Equity Affiliate [Member]
Quarterly Charges And Credits	$ 1.1	$ 0.4	$ 0.4	$ 0.6	$ 0.7	$ 0.6	$ 0.3	$ 0.1
Currency Conversion [Member]
Quarterly Charges And Credits	0.1	0.1	0.3					$ 0.1
Cost Streamlining Initiative [Member]
Quarterly Charges And Credits				0.3
Restructuring Charges (Credits) [Member]
Quarterly Charges And Credits					(0.4)
Houghton Combination-related expenses [Member]
Quarterly Charges And Credits	7.7	$ 9.7	4.3	$ 9.1	$ 0.4	$ 1.2
U.S. Pension Plan Settlement Charge [Member]
Quarterly Charges And Credits			$ 1.9
U.S. Tax Reform Charges [Member]
Quarterly Charges And Credits	22.2
Loss On Disposal Of Held For Sale Asset [Member]
Quarterly Charges And Credits	0.1
Insurance Insolvency Recovery [Member]
Quarterly Charges And Credits	$ 0.6

Pension and Other Postretirement Benefits - Fair Value Hierarchy - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	$ 98,456	$ 86,591
Fair Value of Plan Assets measured at NAV	52,130	49,450
Fair Value of Plan Assets		136,041
Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1,983	1,711
Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11,953	10,061
Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	84,520	74,819
Real Estate Fund [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2,041
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	1,957	1,581
Fair Value of Plan Assets		49,197
Domestic [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	1,957	1,581
Domestic [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	449	302
Domestic [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	449	302
Domestic [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Equity Securities Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	1,508	1,279
Domestic [Member] \| Equity Securities Small Cap [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	1,508	1,279
Domestic [Member] \| Equity Securities Small Cap [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Equity Securities Small Cap [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Domestic [Member] \| Pooled Separate Accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets measured at NAV	1,480	1,431
Domestic [Member] \| Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets measured at NAV	48,527	46,185
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	96,499	85,010
Fair Value of Plan Assets		86,844
Foreign [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	26	130
Foreign [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	11,953	10,061
Foreign [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	84,520	74,819
Foreign [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	26	130
Foreign [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	26	130
Foreign [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Cash and Cash Equivalents [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	2,951	2,753
Foreign [Member] \| Fixed Income Funds [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Fixed Income Funds [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	2,951	2,753
Foreign [Member] \| Fixed Income Funds [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	82,092	72,778
Foreign [Member] \| Insurance Contract [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Insurance Contract [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Insurance Contract [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	82,092	72,778
Fair Value of Plan Assets		72,778
Foreign [Member] \| Equity Funds Diversified [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	9,002	7,308
Foreign [Member] \| Equity Funds Diversified [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Equity Funds Diversified [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	9,002	7,308
Foreign [Member] \| Equity Funds Diversified [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Real Estate Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	2,428	2,041
Foreign [Member] \| Real Estate Fund [Member] \| Fair Value Inputs Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Real Estate Fund [Member] \| Fair Value Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	0	0
Foreign [Member] \| Real Estate Fund [Member] \| Fair Value Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets excluding assets measured at NAV	2,428	2,041
Foreign [Member] \| Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets measured at NAV	$ 2,123	$ 1,834