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Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2020 shares
Document And Entity Information [Abstract]
Document type	10-Q
Document period end date	Jun. 30, 2020
Entity file number	001-12019
Entity registrant name	QUAKER CHEMICAL CORPORATION
Entity tax identification number	23-0993790
Entity address, address line 1	901 E. Hector Street
Entity address, city or town	Conshohocken
Entity address, state or province	PA
Entity address, postal zip code	19428 – 2380
City area code	610
Local phone number	832-4000
Trading symbol	KWR
Entity filer category	Large Accelerated Filer
Entity small business	false
Entity emerging growth company	false
Entity current reporting status	Yes
Amendment flag	false
Document fiscal year focus	2020
Document period focus	Q2
Entity common stock shares outstanding	17,799,606
Current fiscal year end date	--12-31
Entity central index key	0000081362
Entity shell company	false
Document transition report	false
Document quarterly report	true
Entity incorporation state country code	PA
Security exchange name	NYSE
Security 12b title	Common Stock, $1 par value
Entity interactive data current	Yes

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 286,040	$ 205,869	$ 664,601	$ 417,079
Cost of goods sold	188,654	130,708	433,364	266,151
Gross profit	97,386	75,161	231,237	150,928
Selling, general and administrative expenses	86,667	50,026	185,368	101,481
Indefinite-lived intangible asset impairment	0	0	38,000	0
Restructuring and related charges	486	0	2,202	0
Combination, integration and other acquisition-related expenses	7,995	4,604	15,873	9,087
Operating income (loss)	2,238	20,531	(10,206)	40,360
Other (expense)income, net	(993)	43	(22,168)	(592)
Interest expense, net	(6,811)	(733)	(15,272)	(1,509)
(Loss) income before taxes and equity in net income of associated companies	(5,566)	19,841	(47,646)	38,259
Taxes on (loss) income before equity in net income of associated companies	3,222	4,800	(9,848)	9,729
(Loss) income before equity in net income of associated companies	(8,788)	15,041	(37,798)	28,530
Equity in net income of associated companies	1,066	608	1,732	1,019
Net (loss) income	(7,722)	15,649	(36,066)	29,549
Less: Net income attributable to noncontrolling interest	13	58	50	114
Net (loss) income attributable to Quaker Chemical Corporation	$ (7,735)	$ 15,591	$ (36,116)	$ 29,435
Per share data:
Basic (loss) earnings per common share	$ (0.43)	$ 1.17	$ (2.03)	$ 2.21
Diluted (loss) earnings per common share	(0.43)	1.17	(2.03)	2.20
Dividends Declared	$ 0.385	$ 0.385	$ 0.770	$ 0.755

Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (7,722)	$ 15,649	$ (36,066)	$ 29,549
Currency translation adjustments	10,551	(519)	(44,200)	(951)
Defined benefit retirement plans	213	522	17,170	1,228
Current period change in fair value of derivatives	(111)	0	(4,092)	0
Unrealized gain (loss) on available-for-sale securities	1,608	307	(103)	1,580
Other comprehensive income (loss)	12,261	310	(31,225)	1,857
Comprehensive income (loss)	4,539	15,959	(67,291)	31,406
Less: Comprehensive (income) loss attributable to noncontrolling interest	(14)	(82)	81	(137)
Comprehensive income (loss) attributable to Quaker Chemical Corporation	$ 4,525	$ 15,877	$ (67,210)	$ 31,269

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 322,497	$ 123,524
Accounts receivable, net	300,027	375,982
Inventories
Raw materials and supplies	80,331	82,058
Work-in-process and finished goods	93,536	92,892
Prepaid expenses and other current assets	52,847	41,516
Total current assets	849,238	715,972
Property, plant and equipment, at cost	384,960	398,834
Less accumulated depreciation	(196,547)	(185,365)
Property, plant and equipment, net	188,413	213,469
Right of use lease assets	40,517	42,905
Goodwill	604,649	607,205
Other intangible assets, net	1,044,516	1,121,765
Investments in associated companies	87,865	93,822
Deferred tax assets	12,362	14,745
Other non-current assets	43,966	40,433
Total assets	2,871,526	2,850,316
Current liabilities
Short-term borrowings and current portion of long-term debt	38,217	38,332
Accounts and other payables	130,334	170,929
Accrued compensation	22,689	45,620
Accrued restructuring	10,432	18,043
Other current liabilities	81,019	87,010
Total current liabilities	282,691	359,934
Long-term debt	1,070,306	882,437
Long-term lease liabilities	28,908	31,273
Deferred tax liabilities	196,669	211,094
Other non-current liabilities	125,611	123,212
Total liabilities	1,704,185	1,607,950
Equity
Common stock $1 par value; authorized 30,000,000 shares; issued and outstanding 2020 - 17,799,606 shares; 2019 - 17,735,162 shares	17,800	17,735
Capital in excess of par value	896,108	888,218
Retained earnings	362,265	412,979
Accumulated other comprehensive loss	(109,264)	(78,170)
Total Quaker shareholders' equity	1,166,909	1,240,762
Noncontrolling interest	432	1,604
Total equity	1,167,341	1,242,366
Total liabilities and equity	$ 2,871,526	$ 2,850,316

Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
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	17,799,606	17,735,162

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net (loss) income	$ (36,066)	$ 29,549
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	2,375	70
Depreciation and amortization	42,079	9,702
Equity in undistributed earnings of associated companies, net of dividends	3,219	1,658
Acquisition-related fair value adjustments related to inventory	229	0
Deferred compensation, deferred taxes and other, net	(22,033)	(7,141)
Share-based compensation	7,673	1,672
Loss (gain) on disposal of property, plant and equipment and other assets	81	(39)
Insurance settlement realized	(542)	(306)
Indefinite-lived intangible asset impairment	38,000	0
Combination and other acquisition-related expenses, net of payments	1,860	399
Restructuring and related charges	2,202	0
Pension and other postretirement benefit expense	18,784	(21)
Increase (decrease) in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	61,659	(7,893)
Inventories	(3,689)	(257)
Prepaid expenses and other current assets	(2,849)	(2,039)
Change in restructuring liabilities	(9,592)	0
Accounts payable and accrued liabilities	(58,728)	(2,945)
Net cash provided by operating activities	44,662	22,409
Cash flows from investing activities
Investments in property, plant and equipment	(7,534)	(5,544)
Payments related to acquisitions, net of cash acquired	(3,132)	(500)
Proceeds from disposition of assets	11	70
Insurance settlement interest earned	37	131
Net cash used in investing activities	(10,618)	(5,843)
Cash flows from financing activities
Payment of long-term debt	(18,702)	0
Borrowings (repayments) on revolving credit facilities, net	205,500	(24,034)
Repayments on other debt, net	(684)	(6)
Dividends paid	(13,662)	(9,868)
Stock options exercised, other	(1,923)	(1,374)
Purchase of noncontrolling affiliate shareholders	(1,047)	0
Distributions to noncontrolling affiliate shareholders	(751)	0
Net cash provided by (used in) financing activities	168,731	(35,282)
Effect of foreign exchange rate changes on cash	(4,575)	749
Net increase (decrease) in cash, cash equivalents and restricted cash	198,200	(17,967)
Cash, cash equivalents and restricted cash at the beginning of the period	143,555	124,425
Cash, cash equivalents and restricted cash at the end of the period	$ 341,755	$ 106,458

Condensed Financial Information	6 Months Ended
Condensed Financial Information	Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 – Condensed Financial Information As used in these Notes to Condensed Consolidated Financial Statements, the terms “Quaker”, “Quaker Houghton”, the “Company”, “we”, and “our” refer to Quaker Chemical Corporation (doing business as Quaker Houghton), its subsidiaries, and associated companies, unless the context otherwise requires. As used in these Notes to Condensed Consolidated Financial Statements, the term Legacy Quaker refers to the Company prior to the closing of its combination with Houghton International, Inc. (“Houghton”) (herein referred to as the “Combination”). The condensed consolidated financial statements included herein are unaudited and have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) for interim financial reporting and the United States Securities and Exchange Commission (“SEC”) regulations. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the financial statements reflect all adjustments which are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods. The results for the three and six months ended June 30, 2020 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the Company’s Annual Report filed on Form 10-K for the year ended December 31, 2019 (the “2019 Form 10-K”). Hyper-inflationary economies Economies that have a cumulative three-year rate of inflation exceeding 100 % are considered hyper-inflationary in accordance with U.S. GAAP. A legal entity that operates within an economy deemed to be hyper-inflationary is required to remeasure its monetary assets and liabilities to the applicable published exchange rates and record the associated gains or losses resulting from the remeasurement directly to the Condensed Consolidated Statements of Operations. Based on various indices or index compilations currently being used to monitor inflation in Argentina as well as recent economic instability, effective July 1, 2018, Argentina’s economy was considered hyper-inflationary under U.S. GAAP. As a result, the Company began applying hyper-inflationary accounting with respect to the Company's wholly owned Argentine subsidiary beginning July 1, 2018. In addition, Houghton has an Argentina subsidiary to which hyper-inflationary accounting also is applied. As of, and for the three and six months ended June 30, 2020 and 2019, the Company's Argentine subsidiaries represented less than 1 % of the Company’s consolidated total assets and net sales, respectively. During the three and six months ended June 30, 2020, the Company recorded less than $ 0.1 million and $ 0.1 million, respectively, of remeasurement losses associated with the applicable currency conversions related to Argentina. Comparatively, during the three and six months ended June 30, 2019, the Company recorded less than $ 0.1 million of remeasurement gains and $ 0.2 million of remeasurement losses associated with the applicable currency conversion related to Argentina. These losses were recorded within foreign exchange (losses) gains, net, which is a component of other (expense) income, net, in the Company’s Condensed Consolidated Statements of Operations.

Business Combinations	3 Months Ended		6 Months Ended
Business Combinations	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020
Business Combination Separately Recognized Transaction [Abstract]
Business Combination Disclosure [Text Block]	Other Acquisitions In May 2020, the Company acquired Tel Nordic ApS (“TEL”), a company that specializes in lubricants and engineering primarily in high pressure aluminum die casting for its Europe, Middle East and Africa (“EMEA”) reportable segment. Consideration paid was in the form of a convertible promissory note in the amount of 20.0 million DKK, or approximately $ 2.9 million, which was subsequently converted into shares of the Company’s common stock. An adjustment to the purchase price of approximately 0.4 million DKK, or less than $ 0.1 million, was made as a result of finalizing a post-closing settlement in the second quarter of 2020. The Company allocated approximately $ 2.4 million of the purchase price to intangible assets to be amortized over 17 years. In addition, the Company recorded approximately $ 0.5 million of goodwill, related to expected value not allocated to other acquired assets, none of which will be tax deductible. The allocation of the purchase price of TEL has not been finalized and the one-year measurement period has not ended. Further adjustments may be necessary as a result of the Company’s on-going assessment of additional information related to the fair value of assets acquired and liabilities assumed. In March 2020, the Company acquired the remaining 49 % ownership interest in one of its South African affiliates, Quaker Chemical South Africa Limited (“QSA”) for 16.7 million ZAR, or approximately $ 1.0 million, from its joint venture partner PQ Holdings South Africa. QSA is a part of the Company’s EMEA reportable segment. As this acquisition was a change in an existing controlling ownership, the Company recorded $ 0.7 million of excess purchase price over the carrying value of the non-controlling interest in Capital in excess of par value. In 2018 the Company purchased certain formulations and product technology for the mining industry for $ 1.0 million, with $ 0.5 million of the purchase price paid at signing and the remaining $ 0.5 million of the purchase price paid during the first quarter of 2019.	Norman Hay On October 1, 2019 , the Company completed its acquisition of the operating divisions of Norman Hay plc (“Norman Hay”), a private U.K. company that provides specialty chemicals, operating equipment, and services to industrial end markets. The acquisition adds new technologies in automotive, original equipment manufacturer (“OEM”), and aerospace, as well as engineering expertise which is expected to strengthen the Company’s existing equipment solutions platform. The acquired Norman Hay assets and liabilities were assigned to the Global Specialty Businesses reportable segment. The original purchase price was 80.0 million GBP, on a cash-free and debt-free basis, subject to routine and customary post-closing adjustments related to working capital and net indebtedness levels.	Note 2 – Business Combinations Houghton On August 1, 2019 , the Company completed the Combination, whereby the Company acquired all of the issued and outstanding shares of Houghton from Gulf Houghton Lubricants, Ltd. and certain other selling shareholders in exchange for a combination of cash and shares of the Company’s common stock in accordance with the Share Purchase Agreement, dated April 4, 2017. Houghton is a leading global provider of specialty chemicals and technical services for metalworking and other industrial applications. The Company believes that combining Quaker’s and Houghton’s products and service offerings will allow Quaker Houghton to better serve its customers in its various end markets. The Combination was subject to certain regulatory and shareholder approvals. At a shareholder meeting held during 2017, the Company’s shareholders approved the issuance of new shares of the Company’s common stock at closing of the Combination. Also in 2017, the Company received regulatory approvals for the Combination from China and Australia. The Company received regulatory approvals from the European Commission (“EC”) during the second quarter of 2019 and the U.S. Federal Trade Commission (“FTC”) in July 2019. The approvals from the FTC and the EC required the concurrent divestiture of certain steel and aluminum related product lines of Houghton, which were sold by Houghton on August 1, 2019 for approximately $ 37 million in cash. The final remedy agreed with the EC and the FTC was consistent with the Company’s previous expectation that the total divested product lines would be approximately 3 % of the combined company’s net sales. The following table summarizes the fair value of consideration transferred in the Combination: Cash transferred to Houghton shareholders (a) $ 170,829 Cash paid to extinguish Houghton debt obligations 702,556 Fair value of common stock issued as consideration (b) 789,080 Total fair value of consideration transferred $ 1,662,465 a) A portion is held in escrow by a third party, subject to indemnification rights that lapse upon the achievement of certain milestones. (b) Amount was determined based on approximately 4.3 million shares, comprising 24.5 % of the common stock of the Company immediately after the closing, and the closing price per share of Quaker Chemical Corporation common stock of $ 182.27 on August 1, 2019. The Company accounted for the Combination under the acquisition method of accounting. This method requires the recording of acquired assets, including separately identifiable intangible assets, at their fair value on the acquisition date. 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, including indefinite and definite-lived intangible assets, requires management’s judgment and often involves the use of significant estimates and assumptions , including assumptions with respect to future cash inflows and outflows, discount rates, customer attrition rates, royalty rates, asset lives and market multiples, among other items. Fair values were determined by management using a variety of methodolog ies and resources, including external independent valuation experts. The valuation methods included physical appraisals, discounted cash flow analyses, excess earnings, relief from royalty, and other appropriate valuation techniques to determine the fair value of assets acquired and liabilities assumed. The following table presents the current preliminary estimated fair values of Houghton net assets acquired: Measurement August 1, Period August 1, 2019 2019 (1) Adjustments (as adjusted) Cash and cash equivalents $ 75,821 $ — $ 75,821 Accounts receivable, net 178,922 — 178,922 Inventories, net 95,193 — 95,193 Prepaid expenses and other assets 10,652 314 10,966 Property, plant and equipment 115,529 (66) 115,463 Right of use lease assets 10,673 — 10,673 Investments in associated companies 66,447 — 66,447 Other non-current assets 4,710 1,553 6,263 Intangible assets 1,028,400 — 1,028,400 Goodwill 494,915 7,737 502,652 Total assets purchased 2,081,262 9,538 2,090,800 Short-term borrowings, not refinanced at closing 9,297 — 9,297 Accounts payable, accrued expenses and other accrued liabilities 150,078 853 150,931 Deferred tax liabilities 205,082 7,132 212,214 Long-term lease liabilities 6,607 — 6,607 Other non-current liabilities 47,733 1,553 49,286 Total liabilities assumed 418,797 9,538 428,335 Total consideration paid for Houghton 1,662,465 — 1,662,465 Less: cash acquired 75,821 — 75,821 Less: fair value of common stock issued as consideration 789,080 — 789,080 Net cash paid for Houghton $ 797,564 $ - $ 797,564 (1) As previously disclosed in the Company’s 2019 Form 10-K. As of June 30, 2020, the allocation of the purchase price for the Combination has not been finalized and the one-year measurement period has not ended. While not currently expected, further adjustments may be necessary as a result of the Company’s on-going assessment of additional information related to the fair value of assets acquired and liabilities assumed. Houghton assets acquired and liabilities assumed have been assigned to each of the Company’s reportable segments on a specific identification or allocated basis, as applicable. Measurement period adjustments recorded during the first six months of 2020 related primarily to increasing the valuation allowances against the deferred tax assets associated with foreign tax credits acquired as part of the Combination as a result of additional information available used to update the Company’s initial estimates of expenses allocated to foreign source income and expected creditable foreign taxes. In addition, measurement period adjustments include the recognition of additional other non-current assets and other non-current liabilities based on additional information obtained regarding certain tax audits and associated rights to indemnification, and certain non-income tax liabilities payable upon closing of the Combination in certain countries. Combination, integration and other acquisition-related expenses have been and are expected to continue to be significant. The Company incurred total costs of approximately $ 8.3 million and $ 16.5 million for the three and six months ended June 30, 2020, respectively, primarily for professional fees related to Houghton integration activities. Comparatively, the Company incurred total costs of $ 5.5 million and $ 10.8 million during the three and six months ended June 30, 2019, respectively, primarily for various professional fees and integration planning and regulatory approval. These costs also include $ 0.3 million and $ 0.8 million of accelerated depreciation charges during the three and six months ended June 30, 2020, respectively, and $ 0.9 million and $ 1.7 million of interest costs to maintain the bank commitment (“ticking fees”) for the Combination during the three and six months ended June 30, 2019, respectively. The Company had current liabilities related to the Combination, integration and other acquisition-related activities of $ 8.6 million and $ 6.6 million as of June 30, 2020, and December 31, 2019, respectively, primarily recorded within other accrued liabilities on its Condensed Consolidated Balance Sheets. The following table presents the preliminary estimated fair values of Norman Hay net assets acquired: Measurement October 1, Period October 1, 2019 2019 (1) Adjustments (as adjusted) Cash and cash equivalents $ 18,981 $ — $ 18,981 Accounts receivable, net 15,471 — 15,471 Inventories, net 8,213 (49) 8,164 Prepaid expenses and other assets 4,203 — 4,203 Property, plant and equipment 14,981 — 14,981 Right of use lease assets 10,608 — 10,608 Intangible assets 51,088 — 51,088 Goodwill 29,384 102 29,486 Total assets purchased 152,929 53 152,982 Long-term debt included current portions 485 — 485 Accounts payable, accrued expenses and other accrued liabilities 13,488 (708) 12,780 Deferred tax liabilities 12,746 927 13,673 Long-term lease liabilities 8,594 — 8,594 Total liabilities assumed 35,313 219 35,532 Total consideration paid for Norman Hay 117,616 (166) 117,450 Less: estimated purchase price settlement (2) 3,287 (3,287) — Less: cash acquired 18,981 — 18,981 Net cash paid for Norman Hay $ 95,348 $ 3,121 $ 98,469 As previously disclosed in the Company’s 2019 Form 10-K. (2) The Company finalized its post-closing adjustments for the Norman Hay acquisition and paid approximately 2.5 million GBP during the first quarter of 2020 to settle such adjustments. As of June 30, 2020, the allocation of the purchase price for Norman Hay has not been finalized and the one-year measurement period has not ended. Further adjustments may be necessary as a result of the Company’s on-going assessment of additional information related to the fair value of assets acquired and liabilities assumed.

Recently Issued Accounting Standards	6 Months Ended
Recently Issued Accounting Standards	Jun. 30, 2020
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements And Changes In Accounting Principles [Text Block]	Note 3 – Recently Issued Accounting Standards Recently Issued Accounting Standards Adopted The Financial Accounting Standards Board (“FASB”) issued Account Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. The amendments provide temporary optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions to ease the potential accounting and financial reporting burden associated with transitioning away from reference rates that are expected to be discontinued, including the London Interbank Offered Rate (“LIBOR”). ASU 2020-04 is effective for the Company as of March 12, 2020 and generally can be applied through December 31, 2022. As of June 30, 2020, the expedients provided in ASU 2020-04 do not impact the Company; however, the Company will continue to monitor for potential impacts on its consolidated financial statements. The FASB issued ASU 2018-15 , Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract in August 2018 that clarifies the accounting for implementation costs incurred in a cloud computing arrangement under a service contract. This guidance generally aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement under a service contract with the requirements for capitalizing implementation costs related to internal-use software. The guidance within this accounting standard update is effective for annual periods beginning after December 15, 2019 and should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption was permitted. The Company adopted this standard on a prospective basis, effective January 1, 2020. There was no cumulative effect of adoption recorded within retained earnings on January 1, 2020. The FASB issued ASU 2018-14, Disclosure Framework — Changes to the Disclosure Requirements for Defined Benefit Plans in August 2018 that modifies certain disclosure requirements for fair value measurements. The guidance removes certain disclosure requirements regarding transfers between levels of the fair value hierarchy as well as certain disclosures related to the valuation processes for certain fair value measurements. Further, the guidance added certain disclosure requirements including unrealized gains and losses and significant unobservable inputs used to develop certain fair value measurements. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2019, and should be applied prospectively in the initial year of adoption or prospectively to all periods presented, depending on the amended disclosure requirement. Early adoption was permitted. The Company adopted this standard on a prospective basis, effective January 1, 2020. ASU 2018-14 addresses disclosures only and will not have an impact on the Company’s consolidated financial statements. The FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments in June 2016 related to the accounting for and disclosure of credit losses. The FASB subsequently issued several additional accounting standard updates which amended and clarified the guidance, but did not materially change the guidance or its applicability to the Company. This accounting guidance introduces a new model for recognizing credit losses on financial instruments, including customer accounts receivable, based on an estimate of current expected credit losses. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2019. Early adoption was permitted. The Company did not early adopt, but did adopt the guidance in this accounting standard update, including all applicable subsequent updates to this accounting guidance, as required , on a modified retrospective basis, effective January 1, 2020. Adoption did not have a material impact to the Company’s financial statements as expected. However, as a result of this adoption, the Company recorded a cumulative effect of accounting change that resulted in an increase to its allowance for doubtful accounts of approximately $ 1.1 million, a decrease to deferred tax liabilities of $ 0.2 million and a decrease to retained earnings of $ 0.9 million. In accordance with this guidance, the Company recognizes an allowance for credit losses reflecting the net amount expected to be collected from its financial assets, primarily trade accounts receivable. This allowance represents the portion of the receivable that the Company does not expect to collect over its contractual life, considering past events and reasonable and supportable forecasts of future economic conditions. The Company’s allowance for credit losses on its trade accounts receivable is based on specific collectability facts and circumstances for each outstanding receivable and customer, the aging of outstanding receivables and the associated collection risk the Company estimates for certain past due aging categories, and also, the general risk to all outstanding accounts receivable based on historical amounts determined to be uncollectible. Recently Issued Accounting Standards Not Yet Adopted The FASB issued ASU 2020-01, Investments – Equity Securities (Topic 321), Investments – Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) –Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 in January 2020 clarifying the interaction among the accounting standards related to equity securities, equity method investments, and certain derivatives. The new guidance, among other things, states that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting, for the purposes of applying the fair value measurement alternative immediately before applying or upon discontinuing the equity method. The new guidance also addresses the measurement of certain purchased options and forward contracts used to acquire investments. The guidance within this accounting standard update is effective for annual and interim periods beginning after December 15, 2020 and is to be applied prospectively. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued ASU 2019-12 , Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes in December 2019 to simplify the accounting for income taxes. The guidance within this accounting standard update removes certain exceptions, including the exception to the incremental approach for certain intra-period tax allocations, to the requirement to recognize or not recognize certain deferred tax liabilities for equity method investments and foreign subsidiaries, and to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. Further, the guidance simplifies the accounting related to franchise taxes, the step up in tax basis for goodwill, current and deferred tax expense, and codification improvements for income taxes related to employee stock ownership plans. The guidance is effective for annual and interim periods beginning after December 15, 2020. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation. The FASB issued ASU 2018-13 , Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement in August 2018 that modifies certain disclosure requirement s for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this accounting standard update remove disclosures that are no longer considered cost beneficial, clarify the specific requirements of certain disclosures, and add new disclosure requirements as relevant. The guidance within this accounting standard update is effective for annual periods beginning after December 15, 2020, and should be applied retrospectively to all periods presented. Early adoption is permitted. The Company has not early adopted the guidance and is currently evaluating its implementation.

Business Segments	6 Months Ended
Business Segments	Jun. 30, 2020
Segment Reporting Measurement Disclosures [Abstract]
Segment Reporting Disclosure [Text Block]	Note 4 – Business Segments The Company’s operating segments, which are consistent with its reportable segments, reflect the structure of the Company’s internal organization, the method by which the Company’s resources are allocated and the manner by which the Company and the chief operating decision maker assess its performance. During the third quarter of 2019 and in connection with the Combination, the Company reorganized its executive management team to align with its new business structure, which reflects the method by which the chief operating decision maker of the Company assesses its performance and allocates its resources. The Company’s current reportable segment structure includes four segments: (i) Americas; (ii) EMEA; (iii) Asia/Pacific; and (iv) Global Specialty Businesses. The three geographic segments are composed of the net sales and operations in each respective region, excluding net sales and operations managed globally by the Global Specialty Businesses segment, which includes the Company’s container, metal finishing, mining, offshore, specialty coatings, specialty grease and Norman Hay businesses. All prior period information for Legacy Quaker has been recast to reflect these four segments as the Company’s new reportable segments. Prior to the Company’s re-segmentation during the third quarter of 2019, the Company’s historical reportable segments were four geographic regions: (i) North America; (ii) EMEA; (iii) Asia/Pacific; and (iv) South America. Though the Company changed its reportable segments in the third quarter of 2019, the calculation of the reportable segments’ measures of earnings remains otherwise generally consistent with past practices. Segment operating earnings for the Company’s reportable segments are comprised of net sales less cost of goods sold (“COGS”) and selling, general and administrative expenses (“SG&A”) directly related to the respective segment’s product sales. Operating expenses not directly attributable to the net sales of each respective segment are not included in segment operating earnings, such as certain corporate and administrative costs, Combination, integration and other acquisition-related expenses, and restructuring and related charges. Other items not specifically identified with the Company’s reportable segments include interest expense, net and other (expense) income, net. The following table presents information about the performance of the Company’s reportable segments for the three and six months ended June 30, 2020 and 2019: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Net sales Americas $ 80,576 $ 71,747 $ 210,472 $ 143,972 EMEA 77,702 49,012 182,541 101,437 Asia/Pacific 68,421 44,801 141,973 90,968 Global Specialty Businesses 59,341 40,309 129,615 80,702 Total net sales $ 286,040 $ 205,869 $ 664,601 $ 417,079 Segment operating earnings Americas $ 10,303 $ 13,965 $ 39,491 $ 28,304 EMEA 10,245 8,938 28,604 17,731 Asia/Pacific 19,261 12,159 38,802 24,971 Global Specialty Businesses 16,393 10,970 36,953 21,574 Total segment operating earnings 56,202 46,032 143,850 92,580 Combination, integration and other acquisition-related expenses (7,995) (4,604) (15,873) (9,087) Restructuring and related charges (486) — (2,202) — Indefinite-lived intangible asset impairment — — (38,000) — Non-operating and administrative expenses (32,045) (19,070) (70,496) (39,418) Depreciation of corporate assets and amortization (13,438) (1,827) (27,485) (3,715) Operating income (loss) 2,238 20,531 (10,206) 40,360 Other (expense) income, net (993) 43 (22,168) (592) Interest expense, net (6,811) (733) (15,272) (1,509) (Loss) income before taxes and equity in net income of associated companies $ (5,566) $ 19,841 $ (47,646) $ 38,259 Inter-segment revenues for the three and six months ended June 30, 2020 were $ 2.4 million and $ 5.3 million for Americas, $ 5.3 million and $ 10.8 million for EMEA, $ 0.1 million and $ 0.3 million for Asia/Pacific, and $ 1.0 million and $ 2.3 million for Global Specialty Businesses, respectively. Inter-segment revenues for the three and six months ended June 30, 2019 were $ 1.3 million and $ 2.7 million for Americas, $ 4.8 million and $ 10.1 million for EMEA, less than $ 0.1 million and $ 0.1 million for Asia/Pacific, and $ 1.3 million and $ 2.8 million for Global Specialty Businesses, respectively. However, all inter-segment transactions have been eliminated from each reportable segment’s net sales and earnings for all periods presented in the above tables.

Net Sales and Revenue Recognition	6 Months Ended
Net Sales and Revenue Recognition	Jun. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue From Contract With Customer [Text Block]	Note 5 – Net Sales and Revenue Recognition Business Description The Company develops, produces, and markets a broad range of formulated chemical specialty products and offers chemical management services (“Fluidcare”) for various heavy industrial and manufacturing applications throughout its four segments. The Combination increased the Company’s addressable metalworking, metals and industrial end markets, including steel, aluminum, aerospace, defense, transportation-OEM, transportation -components, offshore sub-sea energy, architectural aluminum, construction, tube and pipe, can and container, mining, specialty coatings and specialty greases. The Combination also strengthened the product portfolio of the combined Company. The major product lines of Quaker Houghton include metal remo val fluids, cleaning fluids, corrosion inhibitors, metal drawing and forming fluids, die cast mold releases, heat treatment and quenchants, metal forging fluids, hydraulic fluids, specialty greases, offshore sub-sea energy control fluids, rolling lubricants, rod and wire drawing fluids and surface treatment chemicals. A substantial portion of the Company’s sales worldwide are made directly through its own employees and its Fluidcare programs, with the balance being handled through distributors and agents. The Company’s employees typically visit the plants of customers regularly, work on site, and, through training and experience, identify production needs which can be resolved or otherwise addressed either by adapting the Company’s existing products or by applying new formulations developed in its laboratories. The specialty chemical industry comprises many companies similar in size to the Company, as well as companies larger and smaller than Quaker Houghton. The offerings of many of the Company’s competitors differ from those of Quaker Houghton; some offer a broad portfolio of fluids, including general lubricants, while others have a more specialized product range. All competitors provide different levels of technical services to individual customers. Competition in the industry is based primarily on the ability to provide products that meet the needs of the customer, render technical services and laboratory assistance to the customer and, to a lesser extent, on price. As part of the Company’s Fluidcare business, certain third-party product sales to customers are managed by the Company. Where the Company acts as a principal, revenues are recognized on a gross reporting basis at the selling price negotiated with its customers. Where the Company acts as an agent, revenue is recognized on a net reporting basis at the amount of the administrative fee earned by the Company for ordering the goods. In determining whether the Company is acting as a principal or an agent in each arrangement, the Company considers whether it is primarily responsible for the obligation to provide the specified good, has inventory risk before the specified good has been transferred to the customer and has discretion in establishing the prices for the specified goods. The Company transferred third-party products under arrangements recognized on a net reporting basis of $ 6.2 million and $ 18.7 million for the three and six months ended June 30, 2020, respectively, and $ 10.4 million and $ 20.8 million for the three and six months ended June 30, 2019, respectively. A significant portion of the Company’s revenues are realized from the sale of process fluids and services to manufacturers of steel, aluminum, automobiles, aircraft, industrial equipment, and durable goods, and, therefore, the Company is subject to the same business cycles as those experienced by these manufacturers and their customers. The Company’s financial performance is generally correlated to the volume of global production within the industries it serves, rather than discretely related to the financial performance of such industries. Furthermore, steel and aluminum customers typically have limited manufacturing locations compared to metalworking customers and generally use higher volumes of products at a single location. As previously disclosed in its 2019 Form 10-K, during 2019, the Company’s five largest customers (each composed of multiple subsidiaries or divisions with semiautonomous purchasing authority) accounted for approximately 12 % of consolidated net sales, with its largest customer accounting for approximately 6 % of consolidated net sales. Revenue Recognition Model The Company applies the FASB’s guidance on revenue recognition which requires the Company to recognize revenue in an amount that reflects the consideration to which the Company expects to be entitled in exchange for goods or services transferred to its customers. To do this, the Company applies the five-step model in the FASB’s guidance, which requires the Company to: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when, or as, the Company satisfies a performance obligation. The Company identifies a contract with a customer when a sales agreement indicates approval and commitment of the parties; identifies the rights of the parties; identifies the payment terms; has commercial substance; and it is probable that the Company will collect the consideration to which it will be entitled in exchange for the goods or services that will be transferred to the customer. In most instances, the Company’s contract with a customer is the customer’s purchase order. For certain customers, the Company may also enter into a sales agreement which outlines a framework of terms and conditions which apply to all future and subsequent purchase orders for that customer. In these situations, the Company’s contract with the customer is both the sales agreement as well as the specific customer purchase order. Because the Company’s contract with a customer is typically for a single transaction or customer purchase order, the duration of the contract is almost always one year or less. As a result, the Company has elected to apply certain practical expedients and omit certain disclosures of remaining performance obligations for contracts that have an initial term of one year or less as permitted by the FASB. The Company identifies a performance obligation in a contract for each promised good or service that is separately identifiable from other obligations in the contract and for which the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer. The Company determines the transaction price as the amount of consideration it expects to be entitled to in exchange for fulfilling the performance obligations, including the effects of any variable consideration, significant financing elements, amounts payable to the customer or noncash consideration. For any contracts that have more than one performance obligation, the Company allocates the transaction price to each performance obligation in an amount that depicts the amount of consideration to which the Company expects to be entitled in exchange for satisfying each performance obligation. In accordance with the last step of the FASB’s guidance, the Company recognizes revenue when, or as, it satisfies the performance obligation in a contract by transferring control of a promised good or providing the service to the customer. The Company recognizes revenue over time as the customer receives and consumes the benefits provided by the Company’s performance; the Company’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced; or the Company’s performance does not create an asset with an alternative use to the entity, and the entity has an enforceable right to payment, including a profit margin, for performance completed to date. For performance obligations not satisfied over time, the Company determines the point in time at which a customer obtains control of an asset and the Company satisfies a perf ormance obligation by considering when the Company has a right to payment for the asset; the customer has legal title to the asset; the Company has transferred physical possession of the asset; the customer has the significant risks and rewards of ownership of the asset; or the customer has accepted the asset. The Company typically satisfies its performance obligations and recognizes revenue at a point in time for product sales, generally when products are shipped or delivered to the customer, depending on the terms underlying each arrangement. In circumstances where the Company’s products are on consignment, revenue is generally recognized upon usage or consumption by the customer. For any Fluidcare or other services provided by the Company to the customer, the Company typically satisfies its performance obligations and recognizes revenue over time, as the promised services are performed. The Company uses input methods to recognize revenue over time related to these services, including labor costs and time incurred. The Company believes that these input methods represent the most indicative measure of the Fluidcare or other service work performed by the Company. Other Considerations The Company does not have standard payment terms for all customers; however the Company’s general payment terms require customers to pay for products or services provided after the performance obligation is satisfied. The Company does not have significant financing arrangements with its customers. The Company does not have significant amounts of variable consideration in its contracts with customers and where applicable, the Company’s estimates of variable consideration are not constrained. The Company records certain third-party license fees in other (expense) income, net, in its Condensed Consolidated Statements of Operations, which generally include sales-based royalties in exchange for the license of intellectual property. These license fees are recognized in accordance with their agreed-upon terms and when performance obligations are satisfied, which is generally when the third party has a subsequent sale. Practical Expedients and Accounting Policy Elections The Company has made certain accounting policy elections and elected to use certain practical expedients as permitted by the FASB in applying the guidance on revenue recognition. It is the Company’s policy to not adjust the promised amount of consideration for the effects of a significant financing component as the Company expects, at contract inception, that the period between when the Company transfers a promised good or service to the customer and when the customer pays for that good or service will be one year or less. In addition, it is the Company’s policy to expense costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less. It is also the Company’s accounting policy to exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the entity from a customer, including sales, use, value added, excise and various other taxes. Lastly, the Company has elected to account for shipping and handling activities that occur after the customer has obtained control of a good as a fulfilment cost rather than an additional promised service. Contract Assets and Liabilities The Company recognizes a contract asset or receivable on its Condensed Consolidated Balance Sheet when the Company provides a good or service in advance of receiving consideration. A receivable is the Company’s right to consideration that is unconditional and only the passage of time is required before payment of that consideration is due. A contract asset is the Company’s right to consideration in exchange for goods or services that the Company has transferred to a customer. The Company had no material contract assets recorded on its Condensed Consolidated Balance Sheets as of June 30, 2020 or December 31, 2019. A contract liability is recognized when the Company receives consideration, or if it has the unconditional right to receive consideration, in advance of performance. A contract liability is the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration, or a specified amount of consideration is due, from the customer. The Company’s contract liabilities primarily represent deferred revenue recorded for customer payments received by the Company prior to the Company satisfying the associated performance obligation. Deferred revenues are presented within other current liabilities in the Company’s Condensed Consolidated Balance Sheets. The Company had approximately $ 3.2 million and $ 2.2 million of deferred revenue as of June 30, 2020 and December 31, 2019, respectively. During the six months ended June 30, 2020, the Company satisfied all of the associated performance obligations and recognized into revenue the advanced payments received and recorded as of December 31, 2019. Disaggregated Revenue The Company sells its various industrial process fluids, its specialty chemicals and its technical expertise as a global product portfolio. The Company generally manages and evaluates its performance by segment first, and then by customer industry, rather than by individual product lines. The Company has provided annual net sales information by major product lines that represent approximately 10% or more of consolidated net sales in its 2019 Form 10-K, and those annual percentages are generally consistent with the current quarter’s net sales by product line. Also, net sales of each of the Company’s major product lines are generally spread throughout all three of the Company’s geographic regions, and in most cases, approximately proportionate to the level of total sales in each region. The following tables disaggregate the Company’s net sales by segment, geographic region, customer industry, and timing of revenue recognized for the three and six months ended June 30, 2020 and 2019. The Company has made certain reclassifications of disaggregated customer industry disclosures for the three and six months ended June 30, 2020 to conform with the Company’s current period customer industry segmentation. Three Months Ended June 30, 2020 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 32,687 $ 24,924 $ 35,416 $ 93,027 Metalworking and other 47,889 52,778 33,005 133,672 80,576 77,702 68,421 226,699 Global Specialty Businesses 32,294 15,569 11,478 59,341 $ 112,870 $ 93,271 $ 79,899 $ 286,040 Timing of Revenue Recognized Product sales at a point in time $ 108,644 $ 87,995 $ 78,195 $ 274,834 Services transferred over time 4,226 5,276 1,704 11,206 $ 112,870 $ 93,271 $ 79,899 $ 286,040 Three Months Ended June 30, 2019 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 39,506 $ 24,485 $ 28,391 $ 92,382 Metalworking and other 32,241 24,527 16,410 73,178 71,747 49,012 44,801 165,560 Global Specialty Businesses 31,145 4,138 5,026 40,309 $ 102,892 $ 53,150 $ 49,827 $ 205,869 Timing of Revenue Recognized Product sales at a point in time $ 100,053 $ 53,098 $ 48,406 $ 201,557 Services transferred over time 2,839 52 1,421 4,312 $ 102,892 $ 53,150 $ 49,827 $ 205,869 Six Months Ended June 30, 2020 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 79,360 $ 54,812 $ 77,005 $ 211,177 Metalworking and other 131,112 127,729 64,968 323,809 210,472 182,541 141,973 534,986 Global Specialty Businesses 76,525 32,174 20,916 129,615 $ 286,997 $ 214,715 $ 162,889 $ 664,601 Timing of Revenue Recognized Product sales at a point in time $ 277,446 $ 206,418 $ 159,351 $ 643,215 Services transferred over time 9,551 8,297 3,538 21,386 $ 286,997 $ 214,715 $ 162,889 $ 664,601 Six Months Ended June 30, 2019 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 80,431 $ 49,201 $ 57,604 $ 187,236 Metalworking and other 63,541 52,236 33,364 149,141 143,972 101,437 90,968 336,377 Global Specialty Businesses 63,315 8,001 9,386 80,702 $ 207,287 $ 109,438 $ 100,354 $ 417,079 Timing of Revenue Recognized Product sales at a point in time $ 201,600 $ 109,332 $ 97,057 $ 407,989 Services transferred over time 5,687 106 3,297 9,090 $ 207,287 $ 109,438 $ 100,354 $ 417,079

Leases	6 Months Ended
Leases	Jun. 30, 2020
Leases [Abstract]
Leases Of Lessee Disclosure [Text Block]	Note 6 – Leases The Company determines if an arrangement is a lease at its inception. This determination generally depends on whether the arrangement conveys the right to control the use of an identified fixed asset explicitly or implicitly for a period of time in exchange for consideration. Control of an underlying asset is conveyed if the Company obtains the rights to direct the use of, and obtains substantially all of the economic benefits from the use of, the underlying asset. Lease expense for variable leases and short-term leases is recognized when the obligation is incurred. The Company has operating leases for certain facilities, vehicles and machinery and equipment with remaining lease terms up to 11 years. In addition, the Company has certain land use leases with remaining lease terms up to 95 years. The lease term for all of the Company’s leases includes the non-cancellable period of the lease plus any additional periods covered by an option to extend the lease that the Company is reasonably certain it will exercise. Operating leases are included in right of use lease assets, other current liabilities and long-term lease liabilities on the Condensed Consolidated Balance Sheet. Right of use lease assets and liabilities are recognized at each lease’s commencement date based on the present value of its lease payments over its respective lease term. The Company uses the stated borrowing rate for a lease when readily determinable. When a stated borrowing rate is not available in a lease agreement, the Company uses its incremental borrowing rate based on information available at the lease’s commencement date to determine the present value of its lease payments. In determining the incremental borrowing rate used to present value each of its leases, the Company considers certain information including fully secured borrowing rates readily available to the Company and its subsidiaries. The Company has immaterial finance leases, which are included in property, plant and equipment, current portion of long-term debt and long-term debt on the Condensed Consolidated Balance Sheet. Operating lease expense is recognized on a straight-line basis over the lease term. Operating lease expense for the three and six months ended June 30, 2020 was $ 3.5 million and $ 6.9 million, respectively. Comparatively, operating lease expense for the three and six months ended June 30, 2019 was $ 1.7 million and $ 3.5 million, respectively. Short-term lease expense for the three and six months ended June 30, 2020 was $ 0.4 million and $ 0.9 million, respectively. Comparatively, short-term lease expense for the three and six months ended June 30, 2019 was $ 0.2 million and $ 0.3 million, respectively. The Company has no material variable lease costs or sublease income for the three or six months ended June 30, 2020 and 2019. Cash paid for operating leases during the six months ended June 30, 2020 and 2019 was $ 6.8 million and $ 3.4 million, respectively. The Company recorded new right of use lease assets and associated lease liabilities of $ 4.1 million during the six months ended June 30, 2020. Supplemental balance sheet information related to the Company’s leases is as follows: June 30, December 31, 2020 2019 Right of use lease assets $ 40,517 $ 42,905 Other current liabilities 11,085 11,177 Long-term lease liabilities 28,908 31,273 Total operating lease liabilities $ 39,993 $ 42,450 Weighted average remaining lease term (years) 6.0 6.2 Weighted average discount rate 4.21% 4.21% Maturities of operating lease liabilities as of June 30, 2020 were as follows: June 30, 2020 For the remainder of 2020 $ 6,598 For the year ended December 31, 2021 10,978 For the year ended December 31, 2022 7,435 For the year ended December 31, 2023 5,434 For the year ended December 31, 2024 4,232 For the year ended December 31, 2025 and beyond 11,356 Total lease payments 46,033 Less: imputed interest (6,040) Present value of lease liabilities $ 39,993

Restructuring and Related Activities	6 Months Ended
Restructuring and Related Activities	Jun. 30, 2020
Restructuring And Related Activities [Abstract]
Restructuring And Related Activities Disclosure [TextBlock]	Note 7 – Restructuring and Related Activities As previously disclosed in its 2019 Form 10-K, in the third quarter of 2019, the Company’s management approved a global restructuring plan (the “QH Program”) as part of its plan to realize certain cost synergies associated with the Combination. The QH Program includes restructuring and associated severance costs to reduce total headcount by approximately 325 people globally and plans for the closure of certain manufacturing and non-manufacturing facilities. The exact timing and total costs associated with the QH Program will depend on a number of factors and is subject to change; however, the Company currently expects reduction in headcount and site closures to continue to occur during 2020 and 2021 under the QH Program and estimates that total costs related to the QH Program will approximate one-times the anticipated cost synergies realized from the QH Program. Employee separation benefits will vary depending on local regulations within certain foreign countries and will include severance and other benefits. All costs incurred to date relate to severance costs to reduce headcount as well as costs to close certain facilities and are recorded in restructuring and related charges in the Company’s Condensed Statements of Operations. As described in Note 4 of Notes to Condensed Consolidated Financial Statements, restructuring and related charges are not included in the Company’s calculation of reportable segments’ measure of operating earnings and therefore these costs are not reviewed by or recorded to reportable segments. Activity in the Company’s accrual for restructuring under the QH Program for the six months ended June 30, 2020 is as follows: QH Program Accrued restructuring as of December 31, 2019 $ 18,043 Restructuring and related charges 2,202 Cash payments (9,592) Currency translation adjustments (221) Accrued restructuring as of June 30, 2020 $ 10,432 In connection with the plans for closure of certain manufacturing and non-manufacturing facilities, the Company made a decision to make available for sale certain facilities during the second quarter of 2020 resulting in the reclassification of approximately $ 11.7 million of buildings and land to other current assets as of June 30, 2020.

Share-Based Compensation	6 Months Ended
Share-Based Compensation	Jun. 30, 2020
Share Based Compensation [Abstract]
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]	Note 8 – Share-Based Compensation The Company recognized the following share-based compensation expense in its Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2020 and 2019: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Stock options $ 353 $ 173 $ 785 $ 433 Non-vested restricted stock awards and restricted stock units 1,259 440 2,523 1,138 Non-elective and elective 401(k) matching contribution in stock 1,162 — 1,162 — Employee stock purchase plan — 24 — 47 Director stock ownership plan 54 23 94 54 Performance stock units 280 — 280 — Annual incentive plan (117) — 2,829 — Total share-based compensation expense $ 2,991 $ 660 $ 7,673 $ 1,672 Share-based compensation expense is recorded in SG&A, except for approximately $ 0.3 million and $ 0.8 million for the three and six months ended June 30, 2020, respectively, and less than $ 0.1 million for the six months ended June 30, 2019, recorded within Combination, integration and other acquisition-related expenses. The increase in total share-based compensation expense for the six months ended June 30, 2020 includes performance stock units, annual incentive plan accruals, and non-elective and elective 401(k) matching contributions in stock as components of share-based compensation beginning in 2020, described further below. Stock Options During the first quarter of 2020, the Company granted stock options under its long-term incentive plan (“LTIP”) that are subject only to time-based vesting over a three -year period. For the purposes of determining the fair value of stock option awards, the Company used a Black-Scholes option pricing model and the assumptions set forth in the table below: Number of options granted 49,115 Dividend yield 0.99 % Expected volatility 31.57 % Risk-free interest rate 0.36 % Expected term (years) 4.0 The fair value of these options is amortized on a straight -line basis over the vesting period. As of June 30, 2020, unrecognized compensation expense related to all stock options granted was $ 2.2 million, to be recognized over a weighted average remaining period of 2.2 years. Restricted Stock Awards and Restricted Stock Units During the six months ended June 30, 2020, the Company granted 27,137 non-vested restricted shares and 5,804 non-vested restricted stock units under its LTIP , subject to time-based vesting, generally over a three-year period. The fair value of these grants is based on the trading price of the Company’s common stock on the date of grant. The Company adjusts the grant date fair value of these awards for expected forfeitures based on historical experience As of June 30, 2020, unrecognized compensation expense related to the non-vested restricted shares was $ 6.7 million, to be recognized over a weighted average remaining period of 1.9 years, and unrecognized compensation expense related to non-vested restricted stock units was $ 1.1 million, to be recognized over a weighted average remaining period of 2.3 years. Performance Stock Units In March 2020, the Company included performance -dependent stock awards (“PSUs”) as a component of its LTIP, which will be settled in a certain number of shares subject to market -based and time-based vesting conditions. The number of fully vested shares that may ultimately be issued as settlement for each award may range from 0 % up to 200 % of the target award, subject to the achievement of the Company’s total shareholder return (“TSR”) relative to the performance of the Company’s peer group, the S&P Midcap 400 Materials group. The service period required for the PSUs is three years and the TSR measurement period for the PSUs is from January 1, 2020 through December 31, 2022. Compensation expense for PSUs is measured based on their grant date fair value and is recognized on a straight-line basis over the three-year vesting period. The grant-date fair value of the PSUs was estimated using a Monte Carlo simulation on the grant date and using the following assumptions: (i) a risk-free rate of 0.28 %; (ii) an expected term of 3.0 years; and (iii) a three-year daily historical volatility for each of the companies in the peer group, including Quaker Houghton. As of June 30, 2020, the Company estimates that it will issue approximately 25,500 fully vested shares as of the settlement date of the award based on the conditions of the PSUs and Company’s closing stock price on June 30, 2020. As of June 30, 2020, there was approximately $ 3.1 million of total unrecognized compensation cost related to PSUs which the Company expects to recognize over a weighted-average period of 2.7 years. Annual Incentive Plan The Company maintains an Annual Incentive Plan (“AIP”), which may be settled in cash or a certain number of shares subject to performance-based and time-based vesting conditions. It is the Company’s current intention to settle the 2020 AIP in shares, and therefore, expense associated with the AIP in 2020 will be recorded as a component of share-based compensation expense. The number of fully vested shares that may ultimately be issued as settlement for each award is subject to the achievement of the Company’s performance against certain internal financial and non-financial metrics and approval by the Company’s Compensation Committee. Compensation expense for the AIP is measured based on the estimated total value of the award. The number of shares that will ultimately be issued under the AIP award will be equal to final value of the award converted into a number of shares based on the trading price of the Company’s common stock on the date of settlement. As of June 30, 2020, the Company estimates that it will issue approximately 39,000 fully vested shares as of the settlement date of the award based on the conditions of the AIP, the Company’s projected performance against its performance metrics and Company’s closing stock price on June 30, 2020. Defined Contribution Plan The Company has a 401(k) plan with an employer match covering a majority of its U.S. employees. The Company matches 50 % of the first 6 % of compensation that is contributed to the plan, with a maximum matching contribution of 3 % of compensation. Additionally, the plan provides for non-elective nondiscretionary contributions on behalf of participants who have completed one year of service equal to 3 % of the eligible participant's compensation. The Company’s matching contributions and non-elective contributions may be made in cash or in fully vested shares of the Company’s common stock. Beginning in April 2020, the Company began matching both non-elective and elective 401(k) contributions in fully vested shares of its common stock rather than cash. For the three and six months ended June 30, 2020, total contributions were $ 1.2 million.

Pension and Postretirement Benefits	6 Months Ended
Pension and Postretirement Benefits	Jun. 30, 2020
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Pension And Other Postretirement Benefits Disclosure [Text Block]	Note 9 – Pension and Other Postretirement Benefits The components of net periodic benefit cost for the three and six months ended June 30, 2020 and 2019 are as follows: Three Months Ended June 30, Six Months Ended June 30, Other Other Postretirement Postretirement Pension Benefits Benefits Pension Benefits Benefits 2020 2019 2020 2019 2020 2019 2020 2019 Service cost $ 1,164 $ 978 $ 1 $ 2 $ 2,338 $ 1,963 $ 3 $ 4 Interest cost 1,486 1,105 26 36 3,255 2,216 52 71 Expected return on plan assets (1,761) (978) — — (3,720) (1,962) — — Settlement charge — — — — 22,667 — — — Actuarial loss amortization 615 773 16 — 1,662 1,549 31 — Prior service cost amortization (41) (41) — — (81) (83) — — Net periodic benefit cost $ 1,463 $ 1,837 $ 43 $ 38 $ 26,121 $ 3,683 $ 86 $ 75 In the fourth quarter of 2018, the Company began the process of terminating its Legacy Quaker non-contributory U.S. pension plan (“Legacy Quaker U.S. Pension Plan”). During the third quarter of 2019, the Company received a favorable termination determination letter from the Internal Revenue Service (“I.R.S.”) and amended the Legacy Quaker U.S. Pension Plan to comply with final regulations of the Internal Revenue Code. The Company completed the Legacy Quaker U.S. Pension Plan termination during the first quarter of 2020. In order to terminate the Legacy Quaker U.S. Pension Plan in accordance with I.R.S. and Pension Benefit Guaranty Corporation requirements, the Company was required to fully fund the Legacy Quaker U.S. Pension Plan on a termination basis and the amount necessary to do so was approximately $1.8 million, subject to final true up adjustments. In July 2020, the Company finalized the amount of the liability and related annuity payments and expects to receive a refund in premium of approximately $2 million in August 2020. In addition, the Company recorded a non-cash pension settlement charge at plan termination of approximately $22.7 million. This settlement charge included the immediate recognition into expense of the related unrecognized losses within accumulated other comprehensive (loss) income (“AOCI”) on the balance sheet as of the plan termination date. Employer Contributions The Company previously disclosed in its 2019 Form 10-K that it expected to make minimum cash contributions of $ 10.0 million to its U.S. and foreign pension plans and approximately $ 0.4 million to its other postretirement benefit plans in 2020. As a result of certain current year pension plan funding relief provided by the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) enacted into law on March 27, 2020, the Company now expects to make minimum cash contributions of $ 8.0 million to its U.S. and foreign pension plans in 2020. As of June 30, 2020, $ 4.9 million and $ 0.2 million of contributions have been made to the Company’s U.S. and foreign pension plans and its other postretirement benefit plans, respectively. This excludes the $ 1.8 million of additional funding made in the first quarter of 2020, as required, to terminate the Legacy Quaker U.S. Pension Plan, noted above.

Other Income (Expense)	6 Months Ended
Other Income (Expense)	Jun. 30, 2020
Other Income And Expenses [Abstract]
Other Income And Other Expense Disclosure [Text Block]	Note 10 – Other (Expense) Income, Net The components of other (expense) income, net, for the three and six months ended June 30, 2020 and 2019 are as follows: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Income from third party license fees $ 208 $ 193 $ 512 $ 413 Foreign exchange losses, net (2,004) (144) (1,183) (381) (Loss) gain on fixed asset disposals, net (83) 30 (81) 39 Non-income tax refunds and other related credits 832 813 2,131 965 Pension and postretirement benefit costs, non-service components (341) (895) (23,866) (1,791) Other non-operating income, net 395 46 319 163 Total other (expense) income, net $ (993) $ 43 $ (22,168) $ (592) Pension and postretirement benefit costs, non-service components during the six months ended June 30, 2020 includes $ 22.7 million related to the Legacy Quaker U.S. Pension Plan non-cash settlement charge described in Note 9 of Notes to Condensed Consolidated Financial Statements.

Income Taxes and Uncertain Tax Positions	6 Months Ended
Income Taxes and Uncertain Tax Positions	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Note 11 – Income Taxes and Uncertain Income Tax Positions The Company’s effective tax rate for the three and six months ended June 30, 2020 was an expense of 57.9 % and a benefit of 20.7 %, respectively, compared to an expense of 24.2 % and 25.4 %, respectively, for the three and six months ended June 30, 2019. The Company’s effective tax rate for the three and six months ended June 30, 2020 was impacted by the tax effect of certain one-time pre-tax costs as well as certain tax charges and benefits in the current period including those related to changes in foreign tax credit valuation allowances, discussed below, tax law changes in foreign jurisdictions, changes in uncertain tax positions, and the tax impact of the Company’s termination of its legacy Quaker U.S. Pension Plan. Comparatively, the three and six months ended June 30, 2019 effective tax rates were impacted by certain non-deductible costs associated with the Combination, partially offset by a favorable shift in earnings to entities with lower effective tax rates. On March 27, 2020, in response to COVID-19 and its detrimental impact to the global economy, the CARES Act was enacted into law, providing a stimulus to the U.S. economy in the form of various individual and business assistance programs as well as temporary changes to existing tax law. The changes include a postponement of certain tax payments, deferral of the employer’s portion of the social security tax and certain other payroll -related incentives, and an increase in the interest expense limitation under Section 163(j) of the Internal Revenue Code from 30 % to 50 % for the 2019 and 2020 tax years. ASC 740 requires the tax effects of changes in tax laws or rates to be recorded in the period of enactment. Under the CARES Act, the Company has the option to use its 2019 adjusted taxable income in determining its interest expense limitation under Section 163(j). While the Company is still considering whether to make this election for 2020, the current year tax provision takes into account this potential election and associated tax benefit, which offsets an inc rease to the Company’s foreign tax credit valuation allowance recognized during the current quarter primarily driven by changes in current year projected taxable income due to the negative impacts from COVID-19. In addition, the Company reviewed its existing deferred tax assets in light of COVID-19 and determined that, at this time, no change in valuation allowance is required except with regard to its foreign tax credits as noted above. While the ultimate impact of COVID-19 on the Company’s results of operations is still uncertain, the Company will continue to assess future changes in projected taxable income to determine if they result in additional changes to any of the Company’s valuation allowances. As previously disclosed in its 2019 Form 10-K, the Company had a deferred tax liability of $ 8.2 million at December 31, 2019, which primarily represents the Company’s estimate of non-U.S. taxes it will incur to repatriate certain foreign earnings to the U.S. During the first six months of 2020, the Company made certain adjustments to the deferred tax liability to take into account a tax law change enacted in the first quarter in a certain foreign jurisdiction, the inclusion of other earnings to be repatriated, and the actual repatriation of earnings, resulting in a deferred tax liability of $ 6.3 million as of June 30, 2020. As previously disclosed in its 2019 Form 10-K, in conjunction with the Combination, the Company acquired foreign tax credit deferred tax assets of $ 41.8 million expiring between 2019 and 2028 . Foreign tax credits may be carried forward for 10 years. The Company analyzes the expected impact of the utilization of foreign tax credits based on projected U.S. taxable income, overall domestic loss recapture, annual limitations due to the ownership change limitations provided by the Internal Revenue Code, and enacted tax law amongst other factors. As of December 31, 2019, the Company had net realizable foreign tax credits of $ 32.7 million on its balance sheet expected to be utilized between 2020 and 2026 . As of June 30, 2020, the Company had net realizable foreign tax credits of $ 21.9 million on its balance sheet expected to be utilized between 2020 and 2026 . The change in net realizable foreign tax credits during the first six months of 2020 was primarily driven by the Company's update to its initial opening balance sheet estimate with respect to acquired Houghton foreign tax credit deferred tax assets, described in Note 2 of Notes to Condensed Consolidated Financial Statements, as well as approximately $ 3.7 million of tax expense for the six months ended June 30, 2020 based on revised taxable income projections and changes to the interest expense limitation under the CARES Act amongst other factors. The Company continues to recognize interest and penalties associated with uncertain tax positions as a component of taxes on (loss) income before equity in net income of associated companies in its Condensed Consolidated Statements of Operations. The Company recognized an expense for interest of $ 0.6 million and $ 0.6 million and an expense for penalties of $ 0.6 million and $ 0.5 million in its Condensed Consolidated Statement of Operations for the three and six months ended June 30, 2020, respectively . Comparatively, the Company recognized an expense for interest of $ 0.1 million and $ 0.2 million and an expense for penalties of less than $ 0.1 million for both the three and six months ended June 30, 2019, respectively. As of June 30, 2020, the Company had accrued $ 2.8 million for cumulative interest and $ 4.0 million for cumulative penalties in its Condensed Consolidated Balance Sheets, compared to $ 2.3 million for cumulative interest and $ 3.1 million for cumulative penalties accrued at December 31, 2019. As of June 30, 2020, the Company’s cumulative liability for gross unrecognized tax benefits was $ 21.1 million, an increase of $ 2.0 million from the $ 19.1 million cumulative liability accrued as of December 31, 2019. During the six months ended June 30, 2020 and 2019, the Company recognized a decrease of $ 1.5 million and less than $ 0.1 million, respectively, in its cumulative liability for gross unrecognized tax benefits due to the expiration of the applicable statutes of limitations for certain tax years. The Company estimates that during the year ending December 31, 2020 it will reduce its cumulative liability for gross unrecognized tax benefits by approximately $ 2.3 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, 2020. 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 2006 , China from 2010 , Canada from 2011 , the Netherlands and the United Kingdom from 2014 , Spain from 2015 , Mexico, Germany, and the U.S. from 2016 , India from fiscal year beginning April 1, 2017 and ending March 31, 2018 , and various U.S. state tax jurisdictions from 2010 . 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 2015 . The Company has filed for competent authority relief related to these assessments under the Mutual Agreement Procedures (“MAP”) of the Organization for Economic Co-Operation and Development (“OECD”) for all years except 2007. During the second quarter of 2020, the Company received notification that the Italian and Dutch competent authorities reached an agreement as part of the MAP involving tax years 2008 through 2015. The Company has tentatively agreed to the reduced tax assessments and has recorded $ 1.4 million of additional reserves for uncertain tax positions for the open tax years that is consistent with the tentative agreement reached involving tax years 2008 through 2015. As of June 30, 2020, the Company believes it has adequate reserves for uncertain tax positions with respect to this matter. Houghton Italia, S.r.l is also currently involved in a corporate income tax audit with the Italian tax authorities covering tax years 2014 through 2018. As part of the purchase accounting related to the Combination, the Company has established a $ 5.4 million reserve for uncertain tax positions relating to this audit. These amounts relate to the 2014 to 2018 audit periods as well as the seven- month period in 2019 prior to the Combination. Since these amounts relate to tax periods prior to the Combination, the Company has submitted an indemnification claim against funds held in escrow by Houghton’s former owners for certain tax liabilities arising pre- Combination. As a result, a corresponding $ 5.4 million indemnification receivable has also been established through purchase accounting that would offset the $ 5.4 million in tax liabilities booked through purchase accounting. As of June 30, 2020, the Company believes it has adequate reserves for uncertain tax positions.

Earnings Per Share	6 Months Ended
Earnings Per Share	Jun. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Note 12 – Earnings Per Share The following table summarizes earnings per share calculations for the three and six months ended June 30, 2020 and 2019: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Basic (loss) earnings per common share Net (loss) income attributable to Quaker Chemical Corporation $ (7,735) $ 15,591 $ (36,116) $ 29,435 Less: loss (income) allocated to participating securities 37 (34) 146 (81) Net (loss) income available to common shareholders $ (7,698) $ 15,557 $ (35,970) $ 29,354 Basic weighted average common shares outstanding 17,697,496 13,304,248 17,685,010 13,297,953 Basic (loss) earnings per common share $ (0.43) $ 1.17 $ (2.03) $ 2.21 Diluted (loss) earnings per common share Net (loss) income attributable to Quaker Chemical Corporation $ (7,735) $ 15,591 $ (36,116) $ 29,435 Less: loss (income) allocated to participating securities 37 (34) 146 (81) Net (loss) income available to common shareholders $ (7,698) $ 15,557 $ (35,970) $ 29,354 Basic weighted average common shares outstanding 17,697,496 13,304,248 17,685,010 13,297,953 Effect of dilutive securities — 48,007 — 47,362 Diluted weighted average common shares outstanding 17,697,496 13,352,255 17,685,010 13,345,315 Diluted (loss) earnings per common share $ (0.43) $ 1.17 $ (2.03) $ 2.20 During the third quarter of 2019, the Company issued approximately 4.3 million shares of common stock, comprising 24.5 % of the common stock of the Company immediately after the closing, as a component of the consideration transferred in the Combination. Certain stock options and restricted stock units are not included in the diluted (loss) earnings per share calculation because the effect would have been anti-dilutive. All of the Company’s potentially dilutive shares for the three and six months ended June 30, 2020 are anti-dilutive and not included in the dilutive (loss) earnings per share calculation because of the Company’s net loss for the periods. Comparatively, there were no anti-dilutive shares for the three and six months ended June 30, 2019.

Restricted Cash	6 Months Ended
Restricted Cash	Jun. 30, 2020
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash And Cash Equivalents Disclosure [Text Block]	Note 13 – Restricted Cash The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation. The proceeds of the settlement and release agreements have been deposited into interest bearing accounts that earned less than $ 0.1 million in the six months ended June 30, 2020, compared to $ 0.1 in the six months ended June 30, 2019. The interest was offset by $ 0.5 million of payments during the six months ended June 30, 2020, compared to $ 0.3 million of payments in the six months ended June 30, 2019. Due to the restricted nature of the proceeds, a corresponding deferred credit was established in other non-current liabilities for an equal and offsetting amount, and will remain until the restrictions lapse or the funds are exhausted via payments of claims and costs of defense. The following table provides a reconciliation of cash, cash equivalents and restricted cash as of June 30, 2020 and 2019 , and December 31, 2019 and 2018: June 30, December 31, 2020 2019 2019 2018 Cash and cash equivalents $ 322,497 $ 86,355 $ 123,524 $ 104,147 Restricted cash included in other current assets 85 — 353 — Restricted cash included in other assets 19,173 20,103 19,678 20,278 Cash, cash equivalents and restricted cash $ 341,755 $ 106,458 $ 143,555 $ 124,425

Goodwill and Intangible Assets	6 Months Ended
Goodwill and Intangible Assets	Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets Disclosure [Text Block]	Note 14 – Goodwill and Other Intangible Assets Changes in the carrying amount of goodwill for the six months ended June 30, 2020 were as follows: Global Specialty Americas EMEA Asia/Pacific Businesses Total Balance as of December 31, 2019 $ 216,385 $ 133,018 $ 141,727 $ 116,075 $ 607,205 Goodwill acquired — 531 — — 531 Currency translation and other adjustments (4,569) (3,256) 5,940 (1,202) (3,087) Balance as of June 30, 2020 $ 211,816 $ 130,293 $ 147,667 $ 114,873 $ 604,649 Other adjustments in the table above include updates to the Company’s allocation of the Houghton purchase price and associated goodwill to each of the Company’s reportable segments during the first six months of 2020. Gross carrying amounts and accumulated amortization for definite-lived intangible assets as of June 30, 2020 and December 31, 2019 were as follows: Gross Carrying Accumulated Amount Amortization 2020 2019 2020 2019 Customer lists and rights to sell $ 781,188 $ 792,362 $ 72,803 $ 49,932 Trademarks, formulations and product technology 155,924 157,049 25,475 21,299 Other 6,266 6,261 5,684 5,776 Total definite -lived intangible assets $ 943,378 $ 955,672 $ 103,962 $ 77,007 The Company amortizes definite-lived intangible assets on a straight-line basis over their useful lives. The Company recorded $ 13.7 million and $ 27.7 million of amortization expense for the three and six months ended June 30, 2020, respectively. Comparatively, the Company recorded $ 1.8 million and $ 3.6 million of amortization expense for the three and six months ended June 30, 2019, respectively. Estimated annual aggregate amortization expense for the current year and subsequent five years is as follows: For the year ended December 31, 2020 $ 55,145 For the year ended December 31, 2021 54,885 For the year ended December 31, 2022 54,732 For the year ended December 31, 2023 54,515 For the year ended December 31, 2024 54,089 For the year ended December 31, 2025 53,418 Goodwill and intangible assets that have indefinite lives are not amortized and are required to be assessed at least annually for impairment. The Company completes its annual goodwill and indefinite-lived intangible asset impairment test during the fourth quarter of each year. The Company continuously evaluates if triggering events indicate a possible impairment in one or more of its reporting units or indefinite-lived or long-lived assets. As of March 31, 2020, the Company evaluated the initial imp act of COVID-19 on the Company’s operations, and the volatility and uncertainty in the economic outlook as a result of COVID-19 to determine if they indicated it was more likely than not that the carrying value of any of the Company’s reporting units or indefinite-lived or long-lived assets was not recoverable. The Company concluded that the impact of COVID-19 did not represent a triggering event as of March 31, 2020 with regards to the Company’s reporting units or indefinite-lived and long-lived assets, except for the Company’s Houghton and Fluidcare trademark and tradename indefinite-lived intangible assets. The determination of estimated fair value of the Houghton and Fluidcare trademark and tradename indefinite-lived assets was based on a relief from royalty valuation method which requires management’s judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to the weighted average cost of capital (“WACC”) as well as projected net sales. In the first quarter of 2020, as a result of the impact of COVID-19 driving a decrease in projected legacy Houghton net sales in the current year and the impact of the current year decline on projected future legacy Houghton net sales as well as an increase in the WACC assumption utilized in the quantitative impairment assessment, the Company concluded that the estimated fair values of the Houghton and Fluidcare trademark and tradename intangible assets were less than their carrying values. As a result, an impairment charge of $ 38.0 million to write down the carrying values of these intangible assets to their estimated fair values was recorded in the first quarter of 2020. The Company’s estimate of fair value and the carrying value of these Houghton and Fluidcare trademark and tradename indefinite-lived intangible assets as of June 30, 2020 was $ 204.0 million. Comparatively, these indefinite- lived intangible assets totaled $ 242.0 million as of December 31, 2019. In addition, the Company has other indefinite-lived intangible assets totaling $ 1.1 million as of both June 30, 2020 and December 31, 2019. As of June 30, 2020, the Company continued to evaluate the on -going impact of COVID-19 on the Company’s operations, and the volatility and uncertainty in the economic outlook as a result of COVID-19, to determine if this indicated it was more likely than not that the carrying value of any of the Company’s reporting units or indefinite-lived or long-lived intangible assets were not recoverable. The Company concluded that the impact of COVID-19 did not represent a triggering event as of June 30, 2020 with regards to any of the Company’s reporting units or indefinite-lived and long-lived intangible assets. While the Company concluded that the impact of COVID-19 did not represent a triggering event as of June 30, 2020 for any of its other long-lived or indefinite-lived assets or reporting units, the Company will continue to evaluate the impact of COVID-19 on the Company’s current and projected results. If the current economic conditions worsen or projections of the timeline for recovery are significantly extended, then the Company may conclude in the future that the impact from COVID-19 requires the need to perform further interim quantitative impairment tests, which could result in additional impairment charges in the future.

Debt	6 Months Ended
Debt	Jun. 30, 2020
Debt [Abstract]
Debt Disclosure [Text Block]	Note 15 – Debt Debt as of June 30, 2020 and December 31, 2019 includes the following: As of June 30, 2020 As of December 31, 2019 Interest Outstanding Interest Outstanding Rate Balance Rate Balance Credit Facilities: Revolver 1.67% $ 376,676 3.20% $ 171,169 U.S. Term Loan 2.10% 585,000 3.20% 600,000 EURO Term Loan 1.50% 147,584 1.50% 151,188 Industrial development bonds 5.26% 10,000 5.26% 10,000 Bank lines of credit and other debt obligations Various 1,910 Various 2,608 Total debt $ 1,121,170 $ 934,965 Less: debt issuance costs (12,647) (14,196) Less: short-term and current portion of long-term debts (38,217) (38,332) Total long -term debt $ 1,070,306 $ 882,437 Credit facilities The Company’s primary credit facility (as amended, the “New Credit Facility”) is comprised of a $ 400.0 million multicurrency revolver (the “Revolver”), a $ 600.0 million term loan (the “U.S. Term Loan”), each with the Company as borrower, and a $ 150.0 million (as of August 1, 2019) Euro equivalent term loan (the “EURO Term Loan” and together with the “U.S. Term Loan”, the “Term Loans” ) with Quaker Chemical B.V., a Dutch subsidiary of the Company as borrower, each with a five-year term maturing in August 2024. Subject to the consent of the administrative agent and certain other conditions, the Company may designate additional borrowers. The maximum amount available under the New Credit Facility can be increased by up to $ 300.0 million at the Company’s request if there are lenders who agree to accept additional commitments and the Company has satisfied certain other conditions. Borrowings under the New Credit Facility bear interest at a base rate or LIBOR plus an applicable margin based upon the Company’s consolidated net leverage ratio. There are LIBOR replacement provisions that contemplate a further amendment if and when LIBOR ceases to be reported. The interest rate incurred on the outstanding borrowings under the New Credit Facility during the six months ended June 30, 2020 was approximately 2.5 %. In addition to paying interest on outstanding principal under the New Credit Facility, the Company is required to pay a commitment fee ranging from 0.2 % to 0.3 % depending on the Company’s leverage ratio to the lenders under the Revolver in respect of the unutilized commitments thereunder. The Company has unused capacity under the Revolver of approximately $ 15 million, net of bank letters of credit of approximately $ 8 million, as of June 30, 2020, as the Company drew down most of the available capacity under the Revolver in the second half of March 2020 as a precautionary measure due to the uncertainty of the impact of COVID-19 on the Company as well as on the U.S. capital markets and bank liquidity, among other potential effects. The New Credit Facility is subject to certain financial and other covenants. The Company’s initial consolidated net debt to consolidated adjusted EBITDA ratio cannot exceed 4.25 to 1, with step downs in the permitted ratio over the course of the New Credit Facility. The Company’s consolidated adjusted EBITDA to interest expense ratio cannot be less than 3.0 to 1. The New Credit Facility also prohibits the payment of cash dividends if the Company is in default or if the amount of the dividend paid annually exceeds the greater of $50.0 million and 20% of consolidated adjusted EBITDA unless the ratio of consolidated net debt to consolidated adjusted EBITDA is less than 2.0 to 1, in which case there is no such limitation on amount. As of June 30, 2020 and December 31, 2019, the Company was in compliance with all of the New Credit Facility covenants. The Term Loans have quarterly principal amortization during their respective five-year maturities, with 5.0 % amortization of the principal balance due in years 1 and 2, 7.5 % in year 3, and 10.0 % in years 4 and 5, with the remaining principal amount due at maturity. During the six months ended June 30, 2020, the Company made two quarterly amortization payments related to the Term Loans totaling $ 18.7 million. The New Credit Facility is guaranteed by certain of the Company’s domestic subsidiaries and is secured by first priority liens on substantially all of the assets of the Company and the domestic subsidiary guarantors, subject to certain customary exclusions. The obligations of the Dutch borrower are guaranteed only by certain foreign subsidiaries on an unsecured basis. The New Credit Facility requires the Company to deliver to the administrative agent and each lender the audited consolidated financial statements of the Company for each fiscal year in a prescribed period of time. On March 17, 2020, the Company, the administrative agent, and all parties to the New Credit Facility entered into an amendment (the “Amendment”) which allowed the Company to deliver the annual audited consolidated financial statements for the year ended December 31, 2019 to the bank group no later than April 16, 2020 as compared to the initial deadline of March 17, 2020. The Company delivered its 2019 audited consolidated financial statements to the administrative agent and each lender on March 20, 2020 in compliance with the Amendment. The New Credit Facility required the Company to fix its variable interest rates on at least 20 % of its total Term Loans. In order to satisfy this requirement as well as to manage the Company’s exposure to variable interest rate risk associated with the New Credit Facility, in November 2019, the Company entered into $ 170.0 million notional amounts of three-year interest rate swaps at a base rate of 1.64 % plus an applicable margin as provided in the New Credit Facility, based on the Company’s consolidated net leverage ratio. At the time the Company entered into the swaps, and as of June 30, 2020, this aggregate rate was 3.1 %. See Note 18 of Notes to Condensed Consolidated Financial Statements. The Company capitalized $ 23.7 million of certain third-party debt issuance costs in connection with executing the New Credit Facility. Approximately $ 15.5 million of the capitalized costs were attributed to the Term Loans and recorded as a direct reduction of long-term debt on the Company’s Condensed Consolidated Balance Sheet. Approximately $ 8.3 million of the capitalized costs were attributed to the Revolver and recorded within other assets on the Company’s Condensed Consolidated Balance Sheet. These capitalized costs are being amortized into interest expense over the five-year term of the New Credit Facility. As of June 30, 2020 and December 31, 2019, the Company had $ 12.6 million and $ 14.2 million, respectively, of debt issuance costs recorded as a reduction of long-term debt. As of June 30, 2020 and December 31, 2019, the Company had $ 6.7 million and $ 7.6 million, respectively, of debt issuance costs recorded within other assets. Industrial development bonds As of June 30, 2020 and December 31, 2019, the Company had fixed rate, industrial development authority bonds totaling $ 10.0 million in principal amount due in 2028. These bonds have similar covenants to the New Credit Facility noted above. Bank lines of credit and other debt obligations The Company has certain unsecured bank lines of credit and discounting facilities in one of its foreign subsidiaries, which are not collateralized. The Company’s other debt obligations primarily consist of certain domestic and foreign low interest rate or interest- free municipality-related loans, local credit facilities of certain foreign subsidiaries and capital lease obligations. Total unused capacity under these arrangements as of June 30, 2020 was approximately $ 37 million. In addition to the bank letters of credit described in the “Credit facilities” subsection above, the Company’s only other off-balance sheet arrangements include certain financial and other guarantees. The Company’s total bank letters of credit and guarantees outstanding as of June 30, 2020 were approximately $14 million. For the three and six months ended June 30, 2020, the Company incurred the following debt related expenses included within Interest expense, net, in the Condensed Consolidated Statements of Operations: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Interest expense $ 5,951 $ 1,255 $ 13,663 $ 2,427 Amortization of debt issuance costs 1,188 28 2,375 70 Total $ 7,139 $ 1,283 $ 16,038 $ 2,497 Based on the variable interest rates associated with the New Credit Facility, as of June 30, 2020 and December 31, 2019, the amounts at which the Company’s total debt were recorded are not materially different from their fair market value.

Equity and Noncontrolling Interest	6 Months Ended
Equity and Noncontrolling Interest	Jun. 30, 2020
Stockholders Equity [Abstract]
Stockholders Equity Note Disclosure [Text Block]	Note 16 – Equity The following tables present the changes in equity, net of tax, for the three and six months ended June 30, 2020 and 2019: Accumulated Capital in Other Common Excess of Retained Comprehensive Noncontrolling Stock Par Value Earnings Loss Interest Total Balance at March 31, 2020 $ 17,752 $ 888,533 $ 376,853 $ (121,524) $ 418 $ 1,162,032 Net (loss) income — — (7,735) — 13 (7,722) Amounts reported in other comprehensive income — — — 12,260 1 12,261 Dividends ($ 0.385 per share) — — (6,853) — — (6,853) Share issuance and equity-based compensation plans 48 7,575 — — — 7,623 Balance at June 30, 2020 $ 17,800 $ 896,108 $ 362,265 $ (109,264) $ 432 $ 1,167,341 Balance at March 31, 2019 $ 13,334 $ 96,832 $ 413,992 $ (79,167) $ 1,372 $ 446,363 Net income — — 15,591 — 58 15,649 Amounts reported in other comprehensive income — — — 286 24 310 Dividends ($ 0.385 per share) — — (5,135) — — (5,135) Share issuance and equity-based compensation plans 4 770 — — — 774 Balance at June 30, 2019 $ 13,338 $ 97,602 $ 424,448 $ (78,881) $ 1,454 $ 457,961 The retained earnings and total equity amounts included in the table above as of March 31, 2020 reflect certain immaterial adjustments made in the second quarter of 2020 to the Company’s cumulative effect of an accounting change effective January 1, 2020. See Note 3 of Notes to Condensed Financial Statements. Accumulated Capital in Other Common Excess of Retained Comprehensive Noncontrolling Stock Par Value Earnings Loss Interest Total Balance at December 31, 2019 $ 17,735 $ 888,218 $ 412,979 $ (78,170) $ 1,604 $ 1,242,366 Cumulative effect of an accounting change — — (911) — — (911) Balance at January 1, 2020 17,735 888,218 412,068 (78,170) 1,604 1,241,455 Net (loss) income — — (36,116) — 50 (36,066) Amounts reported in other comprehensive loss — — — (31,094) (131) (31,225) Dividends ($ 0.770 per share) — — (13,687) — — (13,687) Acquisition of noncontrolling interest — (707) — — (340) (1,047) Distribution to noncontrolling interest affiliate shareholders — — — — (751) (751) Share issuance and equity-based compensation plans 65 8,597 — — — 8,662 Balance at June 30, 2020 $ 17,800 $ 896,108 $ 362,265 $ (109,264) $ 432 $ 1,167,341 Balance at December 31, 2018 $ 13,338 $ 97,304 $ 405,125 $ (80,715) $ 1,317 $ 436,369 Cumulative effect of an accounting change — — (44) — — (44) Balance at January 1, 2019 13,338 97,304 405,081 (80,715) 1,317 436,325 Net income — — 29,435 — 114 29,549 Amounts reported in other comprehensive income — — — 1,834 23 1,857 Dividends ($ 0.755 per share) — — (10,068) — — (10,068) Share issuance and equity-based compensation plans — 298 — — — 298 Balance at June 30, 2019 $ 13,338 $ 97,602 $ 424,448 $ (78,881) $ 1,454 $ 457,961 The following tables show the reclassifications from and resulting balances of AOCI for the three and six months ended June 30, 2020 and 2019: Defined Unrealized Currency Benefit (Loss) Gain in Translation Pension Available-for - Derivative Adjustments Plans Sale Securities Instruments Total Balance at March 31, 2020 $ (99,187) $ (17,576) $ (460) $ (4,301) $ (121,524) Other comprehensive income (loss) before reclassifications 10,550 (336) 2,128 (144) 12,198 Amounts reclassified from AOCI — 600 (93) — 507 Current period other comprehensive income (loss) 10,550 264 2,035 (144) 12,705 Related tax amounts — (51) (427) 33 (445) Net current period other comprehensive income (loss) 10,550 213 1,608 (111) 12,260 Balance at June 30, 2020 $ (88,637) $ (17,363) $ 1,148 (4,412) $ (109,264) Balance at March 31, 2019 $ (49,753) $ (29,845) $ 431 $ — $ (79,167) Other comprehensive (loss) income before reclassifications (543) (79) 432 — (190) Amounts reclassified from AOCI — 732 (43) — 689 Current period other comprehensive (loss) income (543) 653 389 — 499 Related tax amounts — (131) (82) — (213) Net current period other comprehensive (loss) income (543) 522 307 — 286 Balance at June 30, 2019 $ (50,296) $ (29,323) $ 738 $ — $ (78,881) Defined Unrealized Currency Benefit Gain (Loss) in Translation Pension Available-for - Derivative Adjustments Plans Sale Securities Instruments Total Balance at December 31, 2019 $ (44,568) $ (34,533) $ 1,251 $ (320) $ (78,170) Other comprehensive (loss) income before reclassifications (44,069) 492 (8) (5,315) (48,900) Amounts reclassified from AOCI — 24,966 (125) — 24,841 Current period other comprehensive (loss) income (44,069) 25,458 (133) (5,315) (24,059) Related tax amounts — (8,288) 30 1,223 (7,035) Net current period other comprehensive (loss) income (44,069) 17,170 (103) (4,092) (31,094) Balance at June 30, 2020 $ (88,637) $ (17,363) $ 1,148 $ (4,412) $ (109,264) Balance at December 31, 2018 $ (49,322) $ (30,551) $ (842) $ — $ (80,715) Other comprehensive (loss) income before reclassifications (974) 81 2,139 — 1,246 Amounts reclassified from AOCI — 1,465 (139) — 1,326 Current period other comprehensive (loss) income (974) 1,546 2,000 — 2,572 Related tax amounts — (318) (420) — (738) Net current period other comprehensive (loss) income (974) 1,228 1,580 — 1,834 Balance at June 30, 2019 $ (50,296) $ (29,323) $ 738 $ — $ (78,881) All reclassifications related to unrealized gain (loss) in available-for-sale securities relate to the Company’s equity interest in a captive insurance company and are recorded in equity in net income of associated companies. The amounts reported in other comprehensive income for non-controlling interest are related to currency translation adjustments.

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Note 17 – Fair Value Measurements The Company has valued its company-owned life insurance policies at fair value. These assets are subject to fair value measurement as follows: Fair Value Measurements at June 30, 2020 Total Using Fair Value Hierarchy Assets Fair Value Level 1 Level 2 Level 3 Company-owned life insurance $ 1,711 $ — $ 1,711 $ — Total $ 1,711 $ — $ 1,711 $ — Fair Value Measurements at December 31, 2019 Total Using Fair Value Hierarchy Assets Fair Value Level 1 Level 2 Level 3 Company-owned life insurance $ 1,782 $ — $ 1,782 $ — Total $ 1,782 $ — $ 1,782 $ — The fair values of Company-owned life insurance assets are based on quotes for like instruments with similar credit ratings and terms. The Company did not hold any Level 3 investments as of June 30, 2020 or December 31, 2019, 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

Hedging Activities	6 Months Ended
Hedging Activities	Jun. 30, 2020
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Derivative Instruments And Hedging Activities Disclosure [Text Block]	Note 18 – Hedging Activities As previously disclosed in its 2019 Form 10-K, in order to satisfy certain requirements of the New Credit Facility as well as to manage the Company’s exposure to variable interest rate risk associated with the New Credit Facility, in November 2019, the Company entered into $ 170.0 million notional amounts of three-year interest rate swaps. See Note 15 of Notes to Condensed Consolidated Financial Statements. These interest rate swaps are designated as cash flow hedges and, as such, the contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in AOCI to the extent effective and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur. The Company has previously used derivative financial instruments primarily for the purposes of hedging exposures to fluctuations in interest rates. The Company did not utilize derivatives designated as cash flow hedges during the three and six months ended June 30, 2019. The balance sheet classification and fair values of the Company’s derivative instruments, which are Level 2 measurements, are as follows: Fair Value Condensed Consolidated June 30, December 31, Balance Sheet Location 2020 2019 Derivatives designated as cash flow hedges: Interest rate swaps Other non-current liabilities $ 5,730 $ 415 $ 5,730 $ 415 The following table presents the net unrealized loss deferred to AOCI: June 30, December 31, 2020 2019 Derivatives designated as cash flow hedges: Interest rate swaps AOCI $ 4,412 $ 320 $ 4,412 $ 320 The following table presents the net gain reclassified from AOCI to earnings: Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Amount and location of expense reclassified from AOCI into Expense (Effective Portion) Interest expense, net $ (483) $ — $ (465) $ — Interest rate swaps are entered into with a limited number of counterparties, each of which allows for net settlement of all contracts through a single payment in a single currency in the event of a default on or termination of any one contract. As such, in accordance with the Company’s accounting policy, these derivative instruments are recorded on a net basis within the Condensed Consolidated Balance Sheets.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments And Contingencies Disclosure [Text Block]	Note 19 – Commitments and Contingencies The Company previously disclosed in its 2019 Form 10-K that AC Products, Inc. (“ACP”), a wholly owned subsidiary, has been operating a groundwater treatment system to hydraulically contain groundwater contamination emanating from ACP’s site, the principal contaminant of which is perchloroethylene. As of June 30, 2020, ACP believes it is close to meeting the conditions for closure of the groundwater treatment system, but continues to operate this system while in discussions with the relevant authorities. As of June 30, 2020, the Company believes that the range of potential-known liabilities associated with the balance of the ACP water remediation program is approximately $ 0.1 million to $ 1.0 million. The low and high ends of the range are based on the length of operation of the treatment system as determined by groundwater modeling. Costs of operation include the operation and maintenance of the extraction well, groundwater monitoring and progr am management. The Company previously disclosed in its 2019 Form 10-K that an inactive subsidiary of the Company that was acquired in 1978 sold certain products containing asbestos, primarily on an installed basis, and is among the defendants in numerous lawsuits alleging injury due to exposure to asbestos. During the three and six months ended June 30, 2020, there have been no significant changes to the facts or circumstances of this previously disclosed matter, aside from on-going claims and routine payments associated with this litigation. Based on a continued analysis of the existing and anticipated future claims against this subsidiary, it is currently projected that the subsidiary’s total liability over the next 50 years for these claims is approximately $ 0.5 million (excluding costs of defense). The Company previously disclosed in its 2019 Form 10-K that as a result of the closing of the Combination, the Company is now party to Houghton environmental matters related to certain domestic and foreign properties currently or previously owned. These environmental matters primarily require the Company to perform long-term monitoring as well as operating and maintenance at each of the applicable sites. During the three and six months ended June 30, 2020, there have been no significant changes to the facts or circumstances of these previously disclosed matters, aside from on-going monitoring and maintenance activities and routine payments associated with each of the sites. The Company continually evaluates its obligations related to such matters, and based on historical costs incurred and projected costs to be incurred over the next 28 years, has estimated the present value range of costs for all of the Houghton environmental matters, on a discounted basis, to be between approximately $ 5 million and $ 6 million as of June 30, 2020, for which $ 5.8 million was accrued within other accrued liabilities and other non-current liabilities on the Company’s Condensed Consolidated Balance Sheet as of June 30, 2020. Comparatively, as of December 31, 2019, the Company had $ 6.6 million accrued for with respect to these matters. 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 $ 0.1 million and $ 0.2 million were accrued as of June 30, 2020 and December 31, 2019, respectively, to provide for such anticipated future environmental assessments and remediation costs. The Company is party to other litigation which management currently believes will not have a material adverse effect on the Company’s results of operations, cash flows or financial condition. In addition, the Company has an immaterial amount of contractual purchase obligations.

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 20 – COVID-19 Global Pandemic In early 2020, a global outbreak of COVID-19 occurred initially in China and then across all locations where the Company does business, and which is continuing into the second half of the year. In March 2020, the World Health Organization formally identified the COVID-19 outbreak as a pandemic. In an effort to halt the outbreak of COVID-19, the governments of impacted countries, including but not limited to the United States, the European Union, and China, have taken various actions to reduce its spread, including travel restrictions, shutdowns of businesses deemed nonessential, and stay-at-home or similar orders. This outbreak and associated measures to reduce its spread have caused significant disruptions to the operations of the Company and its suppliers and customers. The disruptions and negative impact to the Company include significant volume declines and lower net sales first at its China subsidiaries in the first quarter of 2020 and subsequently, particularly beginning in the second half of March and into the second quarter, at many of its other sites globally as the global economy slowed significantly in response to the pandemic. Management continues to monitor the impact that the COVID-19 pandemic is having on the Company, the overall specialty chemical industry, and the economies and markets in which the Company operates. Further, management continues to evaluate how COVID-19-related circumstances, such as remote work arrangements, have affected financial reporting processes, internal control over financial reporting, and disclosure controls and procedures. While the circumstances have presented and are expected to continue to present challenges, at this time, management does not believe that COVID-19 has had a material impact on financial reporting processes, internal controls over financial reporting, and disclosure controls and procedures. The full extent of the COVID-19 pandemic related business and travel restrictions and changes to business and consumer behavior intended to reduce its spread are uncertain as of the date of this Report as COVID-19 and the responses of governmental authorities continue to rapidly evolve globally. The Company cannot reasonably estimate the magnitude of the effects these conditions will have on the Company’s operations as they are subject to significant uncertainties relating to the ultimate geographic spread of the virus, the incidence and severity of the disease, the duration or recurrence of the outbreak, the length of the travel restrictions and business closures imposed by governments of impacted countries, and the economic response by governments of impacted countries. To the extent that the Company’s customers and suppliers continue to be significantly and adversely impacted by COVID-19, this could reduce the availability, or result in delays, of materials or supplies to or from the Company, which in turn could significantly interrupt the Company’s business operations. Such impacts could grow and become more significant to the Company’s operations and the Company’s liquidity or financial position. Therefore, given the speed and frequency of continuously evolving developments with respect to this pandemic, the Company cannot reasonably estimate the magnitude or the full extent to which COVID-19 may impact the Company’s results of operations, liquidity or financial position.

Accounting Policies (Policies)	6 Months Ended
Accounting Policies (Policies)	Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis Of Accounting Policy [Policy Text Block]	The condensed consolidated financial statements included herein are unaudited and have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) for interim financial reporting and the United States Securities and Exchange Commission (“SEC”) regulations. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the financial statements reflect all adjustments which are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods. The results for the three and six months ended June 30, 2020 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the Company’s Annual Report filed on Form 10-K for the year ended December 31, 2019 (the “2019 Form 10-K”).
Segment Reporting, Policy [Policy Text Block]	The Company’s operating segments, which are consistent with its reportable segments, reflect the structure of the Company’s internal organization, the method by which the Company’s resources are allocated and the manner by which the Company and the chief operating decision maker assess its performance. During the third quarter of 2019 and in connection with the Combination, the Company reorganized its executive management team to align with its new business structure, which reflects the method by which the chief operating decision maker of the Company assesses its performance and allocates its resources. The Company’s current reportable segment structure includes four segments: (i) Americas; (ii) EMEA; (iii) Asia/Pacific; and (iv) Global Specialty Businesses. The three geographic segments are composed of the net sales and operations in each respective region, excluding net sales and operations managed globally by the Global Specialty Businesses segment, which includes the Company’s container, metal finishing, mining, offshore, specialty coatings, specialty grease and Norman Hay businesses. All prior period information for Legacy Quaker has been recast to reflect these four segments as the Company’s new reportable segments. Prior to the Company’s re-segmentation during the third quarter of 2019, the Company’s historical reportable segments were four geographic regions: (i) North America; (ii) EMEA; (iii) Asia/Pacific; and (iv) South America.
Revenue Recognition [Policy Text Block]	The Company applies the FASB’s guidance on revenue recognition which requires the Company to recognize revenue in an amount that reflects the consideration to which the Company expects to be entitled in exchange for goods or services transferred to its customers. To do this, the Company applies the five-step model in the FASB’s guidance, which requires the Company to: (i) identify the contract with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when, or as, the Company satisfies a performance obligation. The Company recognizes a contract asset or receivable on its Condensed Consolidated Balance Sheet when the Company provides a good or service in advance of receiving consideration. A receivable is the Company’s right to consideration that is unconditional and only the passage of time is required before payment of that consideration is due. A contract asset is the Company’s right to consideration in exchange for goods or services that the Company has transferred to a customer. A contract liability is recognized when the Company receives consideration, or if it has the unconditional right to receive consideration, in advance of performance. A contract liability is the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration, or a specified amount of consideration is due, from the customer. The Company’s contract liabilities primarily represent deferred revenue recorded for customer payments received by the Company prior to the Company satisfying the associated performance obligation. Deferred revenues are presented within other current liabilities in the Company’s Condensed Consolidated Balance Sheets.
Revenue From Contract With Customer [Policy Text Block]	As part of the Company’s Fluidcare business, certain third-party product sales to customers are managed by the Company. Where the Company acts as a principal, revenues are recognized on a gross reporting basis at the selling price negotiated with its customers. Where the Company acts as an agent, revenue is recognized on a net reporting basis at the amount of the administrative fee earned by the Company for ordering the goods.
Goodwill And Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill and intangible assets that have indefinite lives are not amortized and are required to be assessed at least annually for impairment. The Company completes its annual goodwill and indefinite-lived intangible asset impairment test during the fourth quarter of each year. The Company continuously evaluates if triggering events indicate a possible impairment in one or more of its reporting units or indefinite-lived or long-lived assets.
Lessee Leases [Policy Text Block]	The Company determines if an arrangement is a lease at its inception. This determination generally depends on whether the arrangement conveys the right to control the use of an identified fixed asset explicitly or implicitly for a period of time in exchange for consideration. Control of an underlying asset is conveyed if the Company obtains the rights to direct the use of, and obtains substantially all of the economic benefits from the use of, the underlying asset. Lease expense for variable leases and short-term leases is recognized when the obligation is incurred.

Business Combinations (Tables)	6 Months Ended
Business Combinations (Tables)	Jun. 30, 2020
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Cash transferred to Houghton shareholders (a) $ 170,829 Cash paid to extinguish Houghton debt obligations 702,556 Fair value of common stock issued as consideration (b) 789,080 Total fair value of consideration transferred $ 1,662,465 a) A portion is held in escrow by a third party, subject to indemnification rights that lapse upon the achievement of certain milestones. (b) Amount was determined based on approximately 4.3 million shares, comprising 24.5 % of the common stock of the Company immediately after the closing, and the closing price per share of Quaker Chemical Corporation common stock of $ 182.27 on August 1, 2019.
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Measurement August 1, Period August 1, 2019 2019 (1) Adjustments (as adjusted) Cash and cash equivalents $ 75,821 $ — $ 75,821 Accounts receivable, net 178,922 — 178,922 Inventories, net 95,193 — 95,193 Prepaid expenses and other assets 10,652 314 10,966 Property, plant and equipment 115,529 (66) 115,463 Right of use lease assets 10,673 — 10,673 Investments in associated companies 66,447 — 66,447 Other non-current assets 4,710 1,553 6,263 Intangible assets 1,028,400 — 1,028,400 Goodwill 494,915 7,737 502,652 Total assets purchased 2,081,262 9,538 2,090,800 Short-term borrowings, not refinanced at closing 9,297 — 9,297 Accounts payable, accrued expenses and other accrued liabilities 150,078 853 150,931 Deferred tax liabilities 205,082 7,132 212,214 Long-term lease liabilities 6,607 — 6,607 Other non-current liabilities 47,733 1,553 49,286 Total liabilities assumed 418,797 9,538 428,335 Total consideration paid for Houghton 1,662,465 — 1,662,465 Less: cash acquired 75,821 — 75,821 Less: fair value of common stock issued as consideration 789,080 — 789,080 Net cash paid for Houghton $ 797,564 $ - $ 797,564 (1) As previously disclosed in the Company’s 2019 Form 10-K. Measurement October 1, Period October 1, 2019 2019 (1) Adjustments (as adjusted) Cash and cash equivalents $ 18,981 $ — $ 18,981 Accounts receivable, net 15,471 — 15,471 Inventories, net 8,213 (49) 8,164 Prepaid expenses and other assets 4,203 — 4,203 Property, plant and equipment 14,981 — 14,981 Right of use lease assets 10,608 — 10,608 Intangible assets 51,088 — 51,088 Goodwill 29,384 102 29,486 Total assets purchased 152,929 53 152,982 Long-term debt included current portions 485 — 485 Accounts payable, accrued expenses and other accrued liabilities 13,488 (708) 12,780 Deferred tax liabilities 12,746 927 13,673 Long-term lease liabilities 8,594 — 8,594 Total liabilities assumed 35,313 219 35,532 Total consideration paid for Norman Hay 117,616 (166) 117,450 Less: estimated purchase price settlement (2) 3,287 (3,287) — Less: cash acquired 18,981 — 18,981 Net cash paid for Norman Hay $ 95,348 $ 3,121 $ 98,469 As previously disclosed in the Company’s 2019 Form 10-K. (2) The Company finalized its post-closing adjustments for the Norman Hay acquisition and paid approximately 2.5 million GBP during the first quarter of 2020 to settle such adjustments.

Business Segments (Tables)	6 Months Ended
Business Segments (Tables)	Jun. 30, 2020
Segment Reporting Measurement Disclosures [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Net sales Americas $ 80,576 $ 71,747 $ 210,472 $ 143,972 EMEA 77,702 49,012 182,541 101,437 Asia/Pacific 68,421 44,801 141,973 90,968 Global Specialty Businesses 59,341 40,309 129,615 80,702 Total net sales $ 286,040 $ 205,869 $ 664,601 $ 417,079 Segment operating earnings Americas $ 10,303 $ 13,965 $ 39,491 $ 28,304 EMEA 10,245 8,938 28,604 17,731 Asia/Pacific 19,261 12,159 38,802 24,971 Global Specialty Businesses 16,393 10,970 36,953 21,574 Total segment operating earnings 56,202 46,032 143,850 92,580 Combination, integration and other acquisition-related expenses (7,995) (4,604) (15,873) (9,087) Restructuring and related charges (486) — (2,202) — Indefinite-lived intangible asset impairment — — (38,000) — Non-operating and administrative expenses (32,045) (19,070) (70,496) (39,418) Depreciation of corporate assets and amortization (13,438) (1,827) (27,485) (3,715) Operating income (loss) 2,238 20,531 (10,206) 40,360 Other (expense) income, net (993) 43 (22,168) (592) Interest expense, net (6,811) (733) (15,272) (1,509) (Loss) income before taxes and equity in net income of associated companies $ (5,566) $ 19,841 $ (47,646) $ 38,259

Net Sales and Revenue Recognition (Tables)	6 Months Ended
Net Sales and Revenue Recognition (Tables)	Jun. 30, 2020
Disaggregation Of Revenue [Abstract]
Disaggregation Of Revenue [Table Text Block]	Three Months Ended June 30, 2020 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 32,687 $ 24,924 $ 35,416 $ 93,027 Metalworking and other 47,889 52,778 33,005 133,672 80,576 77,702 68,421 226,699 Global Specialty Businesses 32,294 15,569 11,478 59,341 $ 112,870 $ 93,271 $ 79,899 $ 286,040 Timing of Revenue Recognized Product sales at a point in time $ 108,644 $ 87,995 $ 78,195 $ 274,834 Services transferred over time 4,226 5,276 1,704 11,206 $ 112,870 $ 93,271 $ 79,899 $ 286,040 Three Months Ended June 30, 2019 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 39,506 $ 24,485 $ 28,391 $ 92,382 Metalworking and other 32,241 24,527 16,410 73,178 71,747 49,012 44,801 165,560 Global Specialty Businesses 31,145 4,138 5,026 40,309 $ 102,892 $ 53,150 $ 49,827 $ 205,869 Timing of Revenue Recognized Product sales at a point in time $ 100,053 $ 53,098 $ 48,406 $ 201,557 Services transferred over time 2,839 52 1,421 4,312 $ 102,892 $ 53,150 $ 49,827 $ 205,869 Six Months Ended June 30, 2020 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 79,360 $ 54,812 $ 77,005 $ 211,177 Metalworking and other 131,112 127,729 64,968 323,809 210,472 182,541 141,973 534,986 Global Specialty Businesses 76,525 32,174 20,916 129,615 $ 286,997 $ 214,715 $ 162,889 $ 664,601 Timing of Revenue Recognized Product sales at a point in time $ 277,446 $ 206,418 $ 159,351 $ 643,215 Services transferred over time 9,551 8,297 3,538 21,386 $ 286,997 $ 214,715 $ 162,889 $ 664,601 Six Months Ended June 30, 2019 Consolidated Americas EMEA Asia/Pacific Total Customer Industries Metals $ 80,431 $ 49,201 $ 57,604 $ 187,236 Metalworking and other 63,541 52,236 33,364 149,141 143,972 101,437 90,968 336,377 Global Specialty Businesses 63,315 8,001 9,386 80,702 $ 207,287 $ 109,438 $ 100,354 $ 417,079 Timing of Revenue Recognized Product sales at a point in time $ 201,600 $ 109,332 $ 97,057 $ 407,989 Services transferred over time 5,687 106 3,297 9,090 $ 207,287 $ 109,438 $ 100,354 $ 417,079

Leases (Tables)	6 Months Ended
Leases (Tables)	Jun. 30, 2020
Leases [Abstract]
Operating Leases Of Lessee Disclosure [Text Block]	June 30, December 31, 2020 2019 Right of use lease assets $ 40,517 $ 42,905 Other current liabilities 11,085 11,177 Long-term lease liabilities 28,908 31,273 Total operating lease liabilities $ 39,993 $ 42,450 Weighted average remaining lease term (years) 6.0 6.2 Weighted average discount rate 4.21% 4.21%
Lessee Operating Lease Liability Maturity [Table Text Block]	June 30, 2020 For the remainder of 2020 $ 6,598 For the year ended December 31, 2021 10,978 For the year ended December 31, 2022 7,435 For the year ended December 31, 2023 5,434 For the year ended December 31, 2024 4,232 For the year ended December 31, 2025 and beyond 11,356 Total lease payments 46,033 Less: imputed interest (6,040) Present value of lease liabilities $ 39,993

Restructuring Activities (Tables)	6 Months Ended
Restructuring Activities (Tables)	Jun. 30, 2020
Restructuring And Related Activities [Abstract]
Restructuring and Related Costs [Table Text Block]	QH Program Accrued restructuring as of December 31, 2019 $ 18,043 Restructuring and related charges 2,202 Cash payments (9,592) Currency translation adjustments (221) Accrued restructuring as of June 30, 2020 $ 10,432

Share-Based Compensation (Tables)	6 Months Ended
Share-Based Compensation (Tables)	Jun. 30, 2020
Share Based Compensation [Abstract]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Stock options $ 353 $ 173 $ 785 $ 433 Non-vested restricted stock awards and restricted stock units 1,259 440 2,523 1,138 Non-elective and elective 401(k) matching contribution in stock 1,162 — 1,162 — Employee stock purchase plan — 24 — 47 Director stock ownership plan 54 23 94 54 Performance stock units 280 — 280 — Annual incentive plan (117) — 2,829 — Total share-based compensation expense $ 2,991 $ 660 $ 7,673 $ 1,672
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Number of options granted 49,115 Dividend yield 0.99 % Expected volatility 31.57 % Risk-free interest rate 0.36 % Expected term (years) 4.0

Pension and Postretirement Benefits (Tables)	6 Months Ended
Pension and Postretirement Benefits (Tables)	Jun. 30, 2020
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Pension [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, Other Other Postretirement Postretirement Pension Benefits Benefits Pension Benefits Benefits 2020 2019 2020 2019 2020 2019 2020 2019 Service cost $ 1,164 $ 978 $ 1 $ 2 $ 2,338 $ 1,963 $ 3 $ 4 Interest cost 1,486 1,105 26 36 3,255 2,216 52 71 Expected return on plan assets (1,761) (978) — — (3,720) (1,962) — — Settlement charge — — — — 22,667 — — — Actuarial loss amortization 615 773 16 — 1,662 1,549 31 — Prior service cost amortization (41) (41) — — (81) (83) — — Net periodic benefit cost $ 1,463 $ 1,837 $ 43 $ 38 $ 26,121 $ 3,683 $ 86 $ 75

Other Income (Expense) (Tables)	6 Months Ended
Other Income (Expense) (Tables)	Jun. 30, 2020
Other Income And Expenses [Abstract]
Schedule Of Other Nonoperating Income (Expense) [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Income from third party license fees $ 208 $ 193 $ 512 $ 413 Foreign exchange losses, net (2,004) (144) (1,183) (381) (Loss) gain on fixed asset disposals, net (83) 30 (81) 39 Non-income tax refunds and other related credits 832 813 2,131 965 Pension and postretirement benefit costs, non-service components (341) (895) (23,866) (1,791) Other non-operating income, net 395 46 319 163 Total other (expense) income, net $ (993) $ 43 $ (22,168) $ (592)

Earnings Per Share (Tables)	6 Months Ended
Earnings Per Share (Tables)	Jun. 30, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Basic (loss) earnings per common share Net (loss) income attributable to Quaker Chemical Corporation $ (7,735) $ 15,591 $ (36,116) $ 29,435 Less: loss (income) allocated to participating securities 37 (34) 146 (81) Net (loss) income available to common shareholders $ (7,698) $ 15,557 $ (35,970) $ 29,354 Basic weighted average common shares outstanding 17,697,496 13,304,248 17,685,010 13,297,953 Basic (loss) earnings per common share $ (0.43) $ 1.17 $ (2.03) $ 2.21 Diluted (loss) earnings per common share Net (loss) income attributable to Quaker Chemical Corporation $ (7,735) $ 15,591 $ (36,116) $ 29,435 Less: loss (income) allocated to participating securities 37 (34) 146 (81) Net (loss) income available to common shareholders $ (7,698) $ 15,557 $ (35,970) $ 29,354 Basic weighted average common shares outstanding 17,697,496 13,304,248 17,685,010 13,297,953 Effect of dilutive securities — 48,007 — 47,362 Diluted weighted average common shares outstanding 17,697,496 13,352,255 17,685,010 13,345,315 Diluted (loss) earnings per common share $ (0.43) $ 1.17 $ (2.03) $ 2.20

Restricted Cash (Tables)	6 Months Ended
Restricted Cash (Tables)	Jun. 30, 2020
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Schedule Of Cash And Cash Equivalents [Table Text Block]	June 30, December 31, 2020 2019 2019 2018 Cash and cash equivalents $ 322,497 $ 86,355 $ 123,524 $ 104,147 Restricted cash included in other current assets 85 — 353 — Restricted cash included in other assets 19,173 20,103 19,678 20,278 Cash, cash equivalents and restricted cash $ 341,755 $ 106,458 $ 143,555 $ 124,425

Goodwill and Intangible Assets (Tables)	6 Months Ended
Goodwill and Intangible Assets (Tables)	Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	Global Specialty Americas EMEA Asia/Pacific Businesses Total Balance as of December 31, 2019 $ 216,385 $ 133,018 $ 141,727 $ 116,075 $ 607,205 Goodwill acquired — 531 — — 531 Currency translation and other adjustments (4,569) (3,256) 5,940 (1,202) (3,087) Balance as of June 30, 2020 $ 211,816 $ 130,293 $ 147,667 $ 114,873 $ 604,649
Schedule Of Finite Lived Intangible Assets [Table Text Block]	Gross Carrying Accumulated Amount Amortization 2020 2019 2020 2019 Customer lists and rights to sell $ 781,188 $ 792,362 $ 72,803 $ 49,932 Trademarks, formulations and product technology 155,924 157,049 25,475 21,299 Other 6,266 6,261 5,684 5,776 Total definite -lived intangible assets $ 943,378 $ 955,672 $ 103,962 $ 77,007
Schedule of Finite Lived Intangible Assets Future Amortization Expense [TableText Block]	For the year ended December 31, 2020 $ 55,145 For the year ended December 31, 2021 54,885 For the year ended December 31, 2022 54,732 For the year ended December 31, 2023 54,515 For the year ended December 31, 2024 54,089 For the year ended December 31, 2025 53,418

Debt (Tables)	6 Months Ended
Debt (Tables)	Jun. 30, 2020
Debt [Abstract]
Schedule Of Debt [Table Text Block]	As of June 30, 2020 As of December 31, 2019 Interest Outstanding Interest Outstanding Rate Balance Rate Balance Credit Facilities: Revolver 1.67% $ 376,676 3.20% $ 171,169 U.S. Term Loan 2.10% 585,000 3.20% 600,000 EURO Term Loan 1.50% 147,584 1.50% 151,188 Industrial development bonds 5.26% 10,000 5.26% 10,000 Bank lines of credit and other debt obligations Various 1,910 Various 2,608 Total debt $ 1,121,170 $ 934,965 Less: debt issuance costs (12,647) (14,196) Less: short-term and current portion of long-term debts (38,217) (38,332) Total long -term debt $ 1,070,306 $ 882,437
Debt Related Expenses In Interest Expense, Net [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Interest expense $ 5,951 $ 1,255 $ 13,663 $ 2,427 Amortization of debt issuance costs 1,188 28 2,375 70 Total $ 7,139 $ 1,283 $ 16,038 $ 2,497

Equity and Noncontrolling Interest (Tables)	6 Months Ended
Equity and Noncontrolling Interest (Tables)	Jun. 30, 2020
Stockholders Equity [Abstract]
Schedule of Stockholders Equity [Table Text Block]	Accumulated Capital in Other Common Excess of Retained Comprehensive Noncontrolling Stock Par Value Earnings Loss Interest Total Balance at March 31, 2020 $ 17,752 $ 888,533 $ 376,853 $ (121,524) $ 418 $ 1,162,032 Net (loss) income — — (7,735) — 13 (7,722) Amounts reported in other comprehensive income — — — 12,260 1 12,261 Dividends ($ 0.385 per share) — — (6,853) — — (6,853) Share issuance and equity-based compensation plans 48 7,575 — — — 7,623 Balance at June 30, 2020 $ 17,800 $ 896,108 $ 362,265 $ (109,264) $ 432 $ 1,167,341 Balance at March 31, 2019 $ 13,334 $ 96,832 $ 413,992 $ (79,167) $ 1,372 $ 446,363 Net income — — 15,591 — 58 15,649 Amounts reported in other comprehensive income — — — 286 24 310 Dividends ($ 0.385 per share) — — (5,135) — — (5,135) Share issuance and equity-based compensation plans 4 770 — — — 774 Balance at June 30, 2019 $ 13,338 $ 97,602 $ 424,448 $ (78,881) $ 1,454 $ 457,961 Accumulated Capital in Other Common Excess of Retained Comprehensive Noncontrolling Stock Par Value Earnings Loss Interest Total Balance at December 31, 2019 $ 17,735 $ 888,218 $ 412,979 $ (78,170) $ 1,604 $ 1,242,366 Cumulative effect of an accounting change — — (911) — — (911) Balance at January 1, 2020 17,735 888,218 412,068 (78,170) 1,604 1,241,455 Net (loss) income — — (36,116) — 50 (36,066) Amounts reported in other comprehensive loss — — — (31,094) (131) (31,225) Dividends ($ 0.770 per share) — — (13,687) — — (13,687) Acquisition of noncontrolling interest — (707) — — (340) (1,047) Distribution to noncontrolling interest affiliate shareholders — — — — (751) (751) Share issuance and equity-based compensation plans 65 8,597 — — — 8,662 Balance at June 30, 2020 $ 17,800 $ 896,108 $ 362,265 $ (109,264) $ 432 $ 1,167,341 Balance at December 31, 2018 $ 13,338 $ 97,304 $ 405,125 $ (80,715) $ 1,317 $ 436,369 Cumulative effect of an accounting change — — (44) — — (44) Balance at January 1, 2019 13,338 97,304 405,081 (80,715) 1,317 436,325 Net income — — 29,435 — 114 29,549 Amounts reported in other comprehensive income — — — 1,834 23 1,857 Dividends ($ 0.755 per share) — — (10,068) — — (10,068) Share issuance and equity-based compensation plans — 298 — — — 298 Balance at June 30, 2019 $ 13,338 $ 97,602 $ 424,448 $ (78,881) $ 1,454 $ 457,961
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Defined Unrealized Currency Benefit (Loss) Gain in Translation Pension Available-for - Derivative Adjustments Plans Sale Securities Instruments Total Balance at March 31, 2020 $ (99,187) $ (17,576) $ (460) $ (4,301) $ (121,524) Other comprehensive income (loss) before reclassifications 10,550 (336) 2,128 (144) 12,198 Amounts reclassified from AOCI — 600 (93) — 507 Current period other comprehensive income (loss) 10,550 264 2,035 (144) 12,705 Related tax amounts — (51) (427) 33 (445) Net current period other comprehensive income (loss) 10,550 213 1,608 (111) 12,260 Balance at June 30, 2020 $ (88,637) $ (17,363) $ 1,148 (4,412) $ (109,264) Balance at March 31, 2019 $ (49,753) $ (29,845) $ 431 $ — $ (79,167) Other comprehensive (loss) income before reclassifications (543) (79) 432 — (190) Amounts reclassified from AOCI — 732 (43) — 689 Current period other comprehensive (loss) income (543) 653 389 — 499 Related tax amounts — (131) (82) — (213) Net current period other comprehensive (loss) income (543) 522 307 — 286 Balance at June 30, 2019 $ (50,296) $ (29,323) $ 738 $ — $ (78,881) Defined Unrealized Currency Benefit Gain (Loss) in Translation Pension Available-for - Derivative Adjustments Plans Sale Securities Instruments Total Balance at December 31, 2019 $ (44,568) $ (34,533) $ 1,251 $ (320) $ (78,170) Other comprehensive (loss) income before reclassifications (44,069) 492 (8) (5,315) (48,900) Amounts reclassified from AOCI — 24,966 (125) — 24,841 Current period other comprehensive (loss) income (44,069) 25,458 (133) (5,315) (24,059) Related tax amounts — (8,288) 30 1,223 (7,035) Net current period other comprehensive (loss) income (44,069) 17,170 (103) (4,092) (31,094) Balance at June 30, 2020 $ (88,637) $ (17,363) $ 1,148 $ (4,412) $ (109,264) Balance at December 31, 2018 $ (49,322) $ (30,551) $ (842) $ — $ (80,715) Other comprehensive (loss) income before reclassifications (974) 81 2,139 — 1,246 Amounts reclassified from AOCI — 1,465 (139) — 1,326 Current period other comprehensive (loss) income (974) 1,546 2,000 — 2,572 Related tax amounts — (318) (420) — (738) Net current period other comprehensive (loss) income (974) 1,228 1,580 — 1,834 Balance at June 30, 2019 $ (50,296) $ (29,323) $ 738 $ — $ (78,881)

Fair Value Measurements (Tables)	6 Months Ended
Fair Value Measurements (Tables)	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	Fair Value Measurements at June 30, 2020 Total Using Fair Value Hierarchy Assets Fair Value Level 1 Level 2 Level 3 Company-owned life insurance $ 1,711 $ — $ 1,711 $ — Total $ 1,711 $ — $ 1,711 $ — Fair Value Measurements at December 31, 2019 Total Using Fair Value Hierarchy Assets Fair Value Level 1 Level 2 Level 3 Company-owned life insurance $ 1,782 $ — $ 1,782 $ — Total $ 1,782 $ — $ 1,782 $ —

Hedging Activities (Tables)	6 Months Ended
Hedging Activities (Tables)	Jun. 30, 2020
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]	Fair Value Condensed Consolidated June 30, December 31, Balance Sheet Location 2020 2019 Derivatives designated as cash flow hedges: Interest rate swaps Other non-current liabilities $ 5,730 $ 415 $ 5,730 $ 415 June 30, December 31, 2020 2019 Derivatives designated as cash flow hedges: Interest rate swaps AOCI $ 4,412 $ 320 $ 4,412 $ 320 Three Months Ended Six Months Ended June 30, June 30, 2020 2019 2020 2019 Amount and location of expense reclassified from AOCI into Expense (Effective Portion) Interest expense, net $ (483) $ — $ (465) $ —

Condensed Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Inflationary Percentage	100.00%		100.00%
Equity Method Investment	$ 87,865		$ 87,865		$ 93,822
Financial Statement Line Items With Differences In Reported Amount And Reporting Currency Denominated Amounts [Line Items]
Amount Recognized In Income Due To Inflationary Accounting	$ (100)	$ 100	$ (100)	$ (200)
Argentina Assets Total [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	1.00%		1.00%
Argentina Sales Revenue Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	1.00%	1.00%	1.00%	1.00%

Business Combinations (Details) $ / shares in Units, $ in Thousands, £ in Millions, shares in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 GBP (£)	Dec. 31, 2019 GBP (£)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Aug. 01, 2019 $ / shares shares
Business Combination Separately Recognized Transactions [Line Items]
Business Combination Separately Recognized Transactions Liabilities Recognized	$ 8,600				$ 8,600		$ 6,600
Goodwill	604,649				604,649		$ 607,205
Business Combination Transaction-Related Expenses	8,300			$ 5,500	16,500	$ 10,800
Ticking Fees included in Business Combination Transaction Expenses				$ 900		$ 1,700
Accelerated Depreciation included in Business Combination Transaction Expenses	$ 300				$ 800
Houghton Combination [Member]
Business Combination Separately Recognized Transactions [Line Items]
Business Acquisition Date Of Acquisition Agreement 1					Aug. 01, 2019
Business Acquisition Name Of Acquired Entity					Houghton
Proceeds From Divestiture Of Businesses					$ 37,000
Business Acquisition Share Price \| $ / shares								$ 182.27
Business Acquisitions, Shares Acquired \| shares								4.3
Business Acquisition, Percentage of Voting Interests Acquired								24.50%
Divested product lines impact on Net Sales, percent					0.03
Business Combination Measurement Period					1 year
Norman Hay [Member]
Business Combination Separately Recognized Transactions [Line Items]
Business Acquisition Date Of Acquisition Agreement 1			Oct. 01, 2019
Business Acquisition Name Of Acquired Entity			Norman Hay plc
Business Combination Consideration Transferred \| £			£ 80.0
Post Closing Adjustment \| £		£ 2.5
Business Combination Measurement Period			1 year

Business Combinations- Fair Value Disclosure (Details) - Houghton Combination [Member] $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Payments To Acquire Businesses Gross	$ 170,829
Cash paid to extinguish Houghton Debt obligations	702,556
Shares issued related to the Combination	789,080
Business Combination Consideration Transferred	$ 1,662,465

Business Combinations - Purchase accounting (Details) - USD ($) $ in Thousands	Jun. 30, 2020	May 31, 2020	Oct. 01, 2019	Aug. 01, 2019
Houghton Combination [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 75,821	$ 0		$ 75,821
Accounts receivable, net	178,922	0		178,922
Inventories, net	95,193	0		95,193
Prepaid expenses and other assets	10,966	314		10,652
Property, plant and equipment	115,463	(66)		115,529
Right of use lease assets	10,673	0		10,673
Investments in associated companies	66,447	0		66,447
Other non-current assets	6,263	1,553		4,710
Intangible assets	1,028,400	0		1,028,400
Goodwill	502,652	7,737		494,915
Total assets purchased	2,090,800	9,538		2,081,262
Short-term debt, not refinanced at closing	9,297	0		9,297
Accounts payable, accrued expenses and other current liabilities	150,931	853		150,078
Deferred tax liabilities	212,214	7,132		205,082
Long-term lease liabilities	6,607	0		6,607
Other non-current liabilities	49,286	1,553		47,733
Total liabilities assumed	428,335	9,538		418,797
Total consideration paid	1,662,465	0		1,662,465
Cash Acquired	75,821	0		75,821
Fair value of common stock issued as consideration	789,080	0		789,080
Net cash paid	797,564	0		$ 797,564
Norman Hay [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	18,981	0	$ 18,981
Accounts receivable, net	15,471	0	15,471
Inventories, net	8,164	(49)	8,213
Prepaid expenses and other assets	4,203	0	4,203
Property, plant and equipment	14,981	0	14,981
Right of use lease assets	10,608	0	10,608
Intangible assets	51,088	0	51,088
Goodwill	29,486	102	29,384
Total assets purchased	152,982	53	152,929
Long-term debt included current portions	485	0	485
Accounts payable, accrued expenses and other current liabilities	12,780	(708)	13,488
Deferred tax liabilities	13,673	927	12,746
Long-term lease liabilities	8,594	0	8,594
Total liabilities assumed	35,532	219	35,313
Total consideration paid	117,450	(166)	117,616
Cash Acquired	18,981	0	18,981
Estimated Purchase Price Settlement	0	(3,287)	3,287
Net cash paid	$ 98,469	$ 3,121	$ 95,348

Business Combination- Other (Details) $ in Thousands, kr in Millions, R in Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2020 DKK (kr)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 ZAR (R)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Business Acquisition [Line Items]
Cash Paid for Acquisitions							$ 3,132	$ 500
Goodwill, Acquired During Period							531
Mining North America [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions					$ 500	$ 500
Intangible assets						$ 1,000
South Africa [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions			$ 1,000	R 16.7
Business Acquisition, Percentage of Voting Interests Acquired			49.00%	49.00%
Adjustments To Additional Paid In Capital Other			$ 700
Tel Nordic ApS[Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions	kr 20.0	$ 2,900
Intangible assets		$ 2,400					$ 2,400
Intangible Assets, Amortizable Life	17 years	17 years
Goodwill, Acquired During Period		$ 500
Business Combination Measurement Period							1 year
Post Closing Adjustment	kr 0.4	$ 100

Recently Issued Accounting Standards - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Retained earnings	$ 362,265	$ 412,979
Deferred income taxes	196,669	$ 211,094
Accounting Standards
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Retained earnings	900
Allowance For Doubtful Accounts Receivable	1,100
Deferred income taxes	$ 200

Business Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
Business Segments (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Net sales	$ 286,040	$ 205,869	$ 664,601	$ 417,079
Operating Earnings, Excluding Indirect Operating Expenses	$ 56,202	46,032	143,850	92,580
Number Of Reportable Segments	4
Reconciliation from Segment Totals to Consolidated [Abstract]
Combination, integration and other acquisition-related expenses	$ (7,995)	(4,604)	(15,873)	(9,087)
Restructuring and related charges	(486)	0	(2,202)	0
Indefinite-lived intangible asset impairment	0	0	(38,000)	0
Non-operating and administrative expenses	(32,045)	(19,070)	(70,496)	(39,418)
Depreciation of corporate assets and amortization	(13,438)	(1,827)	(27,485)	(3,715)
Operating (loss) income	2,238	20,531	(10,206)	40,360
Other (expense)income, net	(993)	43	(22,168)	(592)
Interest expense, net	(6,811)	(733)	(15,272)	(1,509)
(Loss) income before taxes and equity in net income of associated companies	(5,566)	19,841	(47,646)	38,259
America's [Member]
Segment Reporting Information [Line Items]
Net sales	80,576	71,747	210,472	143,972
Operating Earnings, Excluding Indirect Operating Expenses	10,303	13,965	39,491	28,304
America's [Member] \| Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	2,400	1,300	5,300	2,700
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	77,702	49,012	182,541	101,437
Operating Earnings, Excluding Indirect Operating Expenses	10,245	8,938	28,604	17,731
EMEA [Member] \| Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	5,300	4,800	10,800	10,100
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	68,421	44,801	141,973	90,968
Operating Earnings, Excluding Indirect Operating Expenses	19,261	12,159	38,802	24,971
Asia Pacific [Member] \| Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	100	100	300	100
Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	59,341	40,309	129,615	80,702
Operating Earnings, Excluding Indirect Operating Expenses	16,393	10,970	36,953	21,574
Global Specialty Businesses [Member] \| Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,000	$ 1,300	$ 2,300	$ 2,800

Net Sales and Revenue Recognition - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenues [Abstract]
Net Reporting Amount	$ 6,200,000	$ 10,400,000	$ 18,700,000	$ 20,800,000
Deferred Revenue	3,200,000		3,200,000		$ 2,200,000
Concentration Risk [Line Items]
Contract With Customer Asset Net	$ 0		$ 0		$ 0
Top Five Customers Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					12.00%
Top Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage					6.00%

Net Sales and Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Product Information [Line Items]
Net sales	$ 286,040	$ 205,869	$ 664,601	$ 417,079
America's [Member]
Product Information [Line Items]
Net sales	80,576	71,747	210,472	143,972
EMEA [Member]
Product Information [Line Items]
Net sales	77,702	49,012	182,541	101,437
Asia Pacific [Member]
Product Information [Line Items]
Net sales	68,421	44,801	141,973	90,968
Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales	274,834	201,557	643,215	407,989
Transferred At Point In Time [Member] \| America's [Member]
Product Information [Line Items]
Net sales	108,644	100,053	277,446	201,600
Transferred At Point In Time [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	87,995	53,098	206,418	109,332
Transferred At Point In Time [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	78,195	48,406	159,351	97,057
Transferred Over Time [Member]
Product Information [Line Items]
Net sales	11,206	4,312	21,386	9,090
Transferred Over Time [Member] \| America's [Member]
Product Information [Line Items]
Net sales	4,226	2,839	9,551	5,687
Transferred Over Time [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	5,276	52	8,297	106
Transferred Over Time [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	1,704	1,421	3,538	3,297
Primary Metals [Member]
Product Information [Line Items]
Net sales	93,027	92,382	211,177	187,236
Primary Metals [Member] \| America's [Member]
Product Information [Line Items]
Net sales	32,687	39,506	79,360	80,431
Primary Metals [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	24,924	24,485	54,812	49,201
Primary Metals [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	35,416	28,391	77,005	57,604
Metalworking and other[Member]
Product Information [Line Items]
Net sales	133,672	73,178	323,809	149,141
Metalworking and other[Member] \| America's [Member]
Product Information [Line Items]
Net sales	47,889	32,241	131,112	63,541
Metalworking and other[Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	52,778	24,527	127,729	52,236
Metalworking and other[Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	33,005	16,410	64,968	33,364
Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	59,341	40,309	129,615	80,702
Global Specialty Businesses [Member] \| America's [Member]
Product Information [Line Items]
Net sales	32,294	31,145	76,525	63,315
Global Specialty Businesses [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	15,569	4,138	32,174	8,001
Global Specialty Businesses [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	11,478	5,026	20,916	9,386
Total sales with Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	286,040	205,869	664,601	417,079
Total sales with Global Specialty Businesses [Member] \| America's [Member]
Product Information [Line Items]
Net sales	112,870	102,892	286,997	207,287
Total sales with Global Specialty Businesses [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	93,271	53,150	214,715	109,438
Total sales with Global Specialty Businesses [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	79,899	49,827	162,889	100,354
Total sales without Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	226,699	165,560	534,986	336,377
Total sales without Global Specialty Businesses [Member] \| America's [Member]
Product Information [Line Items]
Net sales	80,576	71,747	210,472	143,972
Total sales without Global Specialty Businesses [Member] \| EMEA [Member]
Product Information [Line Items]
Net sales	77,702	49,012	182,541	101,437
Total sales without Global Specialty Businesses [Member] \| Asia Pacific [Member]
Product Information [Line Items]
Net sales	$ 68,421	$ 44,801	$ 141,973	$ 90,968

Leases Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
Leases Narrative (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating Lease Cost	$ 3,500,000	$ 1,700,000	$ 6,900,000	$ 3,500,000
Short Term Lease Cost	400,000	200,000	900,000	300,000
Operating Lease Payments			6,800,000	3,400,000
Right Of Use Asset Obtained In Exchange For Operating Lease Liability			4,100,000
Lessee Lease Description [Line Items]
Variable Lease Cost	$ 0	$ 0	$ 0	$ 0
Land Member
Lessee Lease Description [Line Items]
Lessee Operating Lease Term Of Contract	95 years		95 years
Facilities, vehicles, and machinery and equipment [Member]
Lessee Lease Description [Line Items]
Lessee Operating Lease Term Of Contract	11 years		11 years

Leases Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease Right Of Use Asset	$ 40,517	$ 42,905
Operating Lease Liability Current	11,085	11,177
Operating Lease Liability Noncurrent	28,908	31,273
Operating Lease Liability	$ 39,993	$ 42,450
Operating Lease Weighted Average Remaining Lease Term 1	6 years	6 years 2 months 12 days
Operating Lease Weighted Average Discount Rate Percent	421.00%	421.00%

Leases Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Operating Leases Future Minimum Payments Due [Abstract]
For the remainder of 2020	$ 6,598
For the year ended December 31, 2021	10,978
For the year ended December 31, 2022	7,435
For the year ended December 31, 2023	5,434
For the year ended December 31, 2024	4,232
For the year ended December 31, 2025 and beyond	11,356
Total lease payments	46,033
Less: imputed interest	(6,040)
Present value of lease liabilities	$ 39,993	$ 42,450

Restructuring Activities - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) People
Restructuring And Related Activities [Abstract]
Restructuring And Related Cost Description	As previously disclosed in its 2019 Form 10-K, in the third quarter of 2019, the Company’s management approved a global restructuring plan (the “QH Program”) as part of its plan to realize certain cost synergies associated with the Combination. The QH Program includes restructuring and associated severance costs to reduce total headcount by approximately 325 people globally and plans for the closure of certain manufacturing and non-manufacturing facilities. The exact timing and total costs associated with the QH Program will depend on a number of factors and is subject to change; however, the Company currently expects reduction in headcount and site closures to continue to occur during 2020 and 2021 under the QH Program and estimates that total costs related to the QH Program will approximate one-times the anticipated cost synergies realized from the QH Program. Employee separation benefits will vary depending on local regulations within certain foreign countries and will include severance and other benefits.
Restructuring And Related Cost Expected Number Of Positions Eliminated \| People	325
Real Estate Held for sale \| $	$ 11.7

Restructuring Activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Restructuring Activities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Restructuring and adjustments	$ 486	$ 0	$ 2,202	$ 0
Qh Program [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning balance			18,043
Restructuring and adjustments			2,202
Cash payments			(9,592)
Currency translation adjustments			(221)
Accrued restructuring, ending balance	$ 10,432		$ 10,432

Share-Based Compensation - Expense Table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ 2,991	$ 660	$ 7,673	$ 1,672
Stock Options Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	353	173	785	433
Nonvested Stock Awards and Restricted Stock Unit Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	1,259	440	2,523	1,138
401 (k) Matching Stock Contribution Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	1,162	0	1,162	0
Employee Stock Purchase Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	0	24	0	47
Directors Stock Ownership Plan Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	54	23	94	54
Performance Incentive Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	280	0	280	0
Annual Incentive Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ (117)	$ 0	$ 2,829	$ 0

Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share Based Compensation [Abstract]
Option Award Vesting Period			3 years
Share Based Compensation [Line Items]
Share-based Compensation Expense in Period, Stock Option Awards	$ 2,991	$ 660	$ 7,673	$ 1,672
Allocated Share-based Compensation Expense	2,991	660	$ 7,673	1,672
Defined Contribution Plan Employer Matching Contribution Percent			6.00%
Defined Contribution Plan Employer Matching Contribution Percent Maximum			3.00%
Defined Contribution Plan Employer Matching Contribution Percent Of Match			50.00%
Defined Contribution Plan Employer Discretionary Contribution Amount			$ 1,200
Stock Options [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	2,200		$ 2,200
Weighted Average Remaining Life, Nonvested Stock Awards			2 years 2 months 12 days
Restricted Stock LTIP Plan [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	6,700		$ 6,700
Weighted Average Remaining Life, Nonvested Stock Awards			1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			27,137
Restricted Stock Units (RSUs) LTIP Plan [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	1,100		$ 1,100
Weighted Average Remaining Life, Nonvested Stock Awards			2 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			5,804
Annual Incentive Plan [Member]
Share Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			39,000
Share-based Compensation Expense in Period, Stock Option Awards	(117)	0	$ 2,829	0
Allocated Share-based Compensation Expense	(117)	0	2,829	0
Combination And Other Acquisition Related [Member]
Share Based Compensation [Line Items]
Share-based Compensation Expense in Period, Stock Option Awards	300		800	100
Allocated Share-based Compensation Expense	300		800	100
Performance Incentive Stock Units [Member]
Share Based Compensation [Line Items]
Unrecognized Share-based Compensation Expense, Nonvested Stock Award	3,100		$ 3,100
Weighted Average Remaining Life, Nonvested Stock Awards			2 years 8 months 12 days
Share-based Compensation Expense in Period, Stock Option Awards	280	0	$ 280	0
Allocated Share-based Compensation Expense	$ 280	$ 0	$ 280	$ 0

Share-Based Compensation - Options Grant (Details)	6 Months Ended
Share-Based Compensation - Options Grant (Details)	Jun. 30, 2020 shares
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	49,115
Dividend Yield	0.99%
Expected Volatility	31.57%
Risk-free Interest Rate	0.36%
Expected Term (Years)	4 years
Performance Incentive Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	25,500
Risk-free Interest Rate	0.28%
Expected Term (Years)	3 years
Vesting shares target lower percent	0.00%
Vesting shares target upper percent	200.00%

Pension and Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Settlement Charge			$ (22,700)
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$ 8,000		$ 8,000
Defined benefit plan description of nature of event resulting in contractual termination benefits to be recognized in future period			In the fourth quarter of 2018, the Company began the process of terminating its Legacy Quaker non-contributory U.S. pension plan (“Legacy Quaker U.S. Pension Plan”). During the third quarter of 2019, the Company received a favorable termination determination letter from the Internal Revenue Service (“I.R.S.”) and amended the Legacy Quaker U.S. Pension Plan to comply with final regulations of the Internal Revenue Code. The Company completed the Legacy Quaker U.S. Pension Plan termination during the first quarter of 2020. In order to terminate the Legacy Quaker U.S. Pension Plan in accordance with I.R.S. and Pension Benefit Guaranty Corporation requirements, the Company was required to fully fund the Legacy Quaker U.S. Pension Plan on a termination basis and the amount necessary to do so was approximately $1.8 million, subject to final true up adjustments. In July 2020, the Company finalized the amount of the liability and related annuity payments and expects to receive a refund in premium of approximately $2 million in August 2020. In addition, the Company recorded a non-cash pension settlement charge at plan termination of approximately $22.7 million. This settlement charge included the immediate recognition into expense of the related unrecognized losses within accumulated other comprehensive (loss) income (“AOCI”) on the balance sheet as of the plan termination date.
Expected Pension Premium Refund			$ 2,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,164	$ 978	2,338	$ 1,963
Defined Benefit Plan, Interest Cost	1,486	1,105	3,255	2,216
Defined Benefit Plan, Expected Return on Plan Assets	(1,761)	(978)	(3,720)	(1,962)
Defined Benefit Plan, Settlement Charge	0	0	22,667	0
Defined Benefit Plan, Amortization of Losses	615	773	1,662	1,549
Defined Benefit Plan, Amortization of Prior Service Cost	(41)	(41)	(81)	(83)
Defined Benefit Plan, Net Periodic Benefit Cost	1,463	1,837	26,121	3,683
Defined Benefit Plan, Expected Contributions In Current Fiscal Year	10,000		10,000
Defined Benefit Plan, Contributions by Employer			4,900
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1	2	3	4
Defined Benefit Plan, Interest Cost	26	36	52	71
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Settlement Charge	0	0	0	0
Defined Benefit Plan, Amortization of Losses	16	0	31	0
Defined Benefit Plan, Amortization of Prior Service Cost	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	43	$ 38	86	$ 75
Defined Benefit Plan, Expected Contributions In Current Fiscal Year	$ 400		400
Defined Benefit Plan, Contributions by Employer			200
Defined benefit plan settlement [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			$ 1,800

Other Income (expense) - (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Other Income (expense) - (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income And Expenses [Abstract]
Income from third party license fees	$ 208	$ 193	$ 512	$ 413
Foreign exchange (losses) gains, net	(2,004)	(144)	(1,183)	(381)
Gain on fixed asset disposals, net	(83)	30	(81)	39
Non-income tax refunds and other related credits	832	813	2,131	965
Pension and post retirement benefit costs, non-service components	(341)	(895)	(23,866)	(1,791)
Other Operating Income (Expense) Net	395	46	319	163
Total other income (expense), net	$ (993)	$ 43	(22,168)	$ (592)
Defined Benefit Plan Settlement Charge			$ 22,700

Income Taxes and Uncertain Tax Positions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	57.90%	24.20%	(20.70%)	25.40%
Unrecognized Tax Benefits, Interest on Income Taxes Expense	$ 0.6	$ 0.1	$ 0.6	$ 0.2
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	2.8		2.8		$ 2.3
Unrecognized Tax Benefits, Income Tax Penalties Accrued	4.0		4.0		3.1
Unrecognized Tax Benefits, Income Tax Penalties Expense	0.6	$ 0.1	0.5	0.1
Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations			1.5	$ 0.1
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease In Unrecognized Tax Benefits Is Reasonably Possible	2.3		2.3		2.0
Unrecognized Tax Benefits	21.1		$ 21.1		$ 19.1
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2016
TaxCreditCarryforwardDescription					2019 and 2028
Effect Of Tax Rate Change			50.00%	30.00%
Unrecognized tax Benefits Reserve	5.4		$ 5.4
Deferred Tax Liabilities	6.3		6.3		$ 8.2
Valuation Allowance Amount Related To Business Combination	5.4		5.4
Liability For Uncertain Tax Positions Noncurrent	1.4		1.4
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions			$ 3.7
TaxCreditCarryforwardDescription			2020 and 2026
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
TaxCreditCarryforwardDescription					2020 and 2026
DeferredTaxAssetsTaxCreditCarryforwardsForeign	$ 21.9		$ 21.9		$ 32.7
DeferredTaxAssetsTaxCreditCarryforwards					$ 41.8
Foreign Tax Authority [Member] \| The Netherlands [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2014
Foreign Tax Authority [Member] \| United Kingdom [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2014
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			2015
Foreign Tax Authority [Member] \| China [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2010
Foreign Tax Authority [Member] \| Italy [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2006
Income Tax Examination Description			2007 through 2015
Foreign Tax Authority [Member] \| India [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2018
Foreign Tax Authority [Member] \| Mexico [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2016
Foreign Tax Authority [Member] \| Canada [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2011
Foreign Tax Authority [Member] \| Germany [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2016
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Income Tax Examination Year Under Examination			2010

Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net (loss) income attributable to Quaker Chemical Corporation	$ (7,735)	$ 15,591	$ (36,116)	$ 29,435
Less: (Loss) income allocated to participating securities	37	(34)	146	(81)
Net (loss) income available to common shareholders	$ (7,698)	$ 15,557	$ (35,970)	$ 29,354
Basic weighted average common shares outstanding	17,697,496	13,304,248	17,685,010	13,297,953
Basic (loss) earnings per common share	$ (0.43)	$ 1.17	$ (2.03)	$ 2.21

- Definition

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

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- Definition

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

+ References + Details

Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net (loss) income attributable to Quaker Chemical Corporation	$ (7,735)	$ 15,591	$ (36,116)	$ 29,435
Less: loss (income) allocated to participating securities	37	(34)	146	(81)
Net Income Available to Common Shareholders	$ (7,698)	$ 15,557	$ (35,970)	$ 29,354
Basic weighted average common shares outstanding	17,697,496	13,304,248	17,685,010	13,297,953
Effect of dilutive securities	0	48,007	0	47,362
Diluted weighted average common shares outstanding	17,697,496	13,352,255	17,685,010	13,345,315
Diluted (loss) earnings per common share	$ (0.43)	$ 1.17	$ (2.03)	$ 2.20

- Definition

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

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- Definition

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

+ References + Details

Earnings Per Share - Narrative (Details) - shares	3 Months Ended			6 Months Ended
Earnings Per Share - Narrative (Details) - shares	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0		0	0	0
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued		4,300,000
Business Acquisition Equity Interest Issued Or Issuable Percentage Of Company In Shares Issued		24.50%

Restricted Cash (Details) - USD ($) $ in Thousands	6 Months Ended
Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 322,497	$ 86,355	$ 123,524	$ 104,147
Restricted Cash Included in other current assets	85	0	353	0
Restricted Cash Included in other assets	19,173	20,103	19,678	20,278
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents	$ 341,755	106,458	$ 143,555	$ 124,425
Loss Contingency, Settlement Agreement, Terms	The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million.
Paymentsofsettlementandreleaseagreements	$ 500	300
ProceedsOfSettlementAndReleaseAgreements	$ 100	$ 100

Goodwill Assets (Details) $ in Thousands	6 Months Ended
Goodwill Assets (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 607,205
Goodwill additions	531
Goodwill, Translation Adjustments	(3,087)
Goodwill, Ending Balance	604,649
America's [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	216,385
Goodwill additions	0
Goodwill, Translation Adjustments	(4,569)
Goodwill, Ending Balance	211,816
EMEA [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	133,018
Goodwill additions	531
Goodwill, Translation Adjustments	(3,256)
Goodwill, Ending Balance	130,293
Asia Pacific [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	141,727
Goodwill additions	0
Goodwill, Translation Adjustments	5,940
Goodwill, Ending Balance	147,667
Global Specialty Businesses [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	116,075
Goodwill additions	0
Goodwill, Translation Adjustments	(1,202)
Goodwill, Ending Balance	$ 114,873

Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Gross [Abstract]
Customer Lists And Rights To Sell	$ 781,188	$ 792,362
Trademarks, Formulations And Product Technology	155,924	157,049
Other Finite-Lived Intangible Assets, Gross	6,266	6,261
Total	943,378	955,672
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	103,962	77,007
Customer Lists And Rights To Sell [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	72,803	49,932
Trademarks Formulations and Product Technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	25,475	21,299
Other Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,684	$ 5,776

Intangible Assets - Amortization (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization	$ 13.7	$ 1.8	$ 27.7	$ 3.6

Intangible Assets - Future Amortization (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
For the year ended December 31, 2020	$ 55,145
For the year ended December 31, 2021	54,885
For the year ended December 31, 2022	54,732
For the year ended December 31, 2023	54,515
For the year ended December 31, 2024	54,089
For the year ended December 31, 2025	$ 53,418

Intangible Assets - Finite Lived (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset impairment	$ 0	$ 0	$ 38,000	$ 0
Houghton Combination [Member]
Finite Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	204,000		204,000		$ 242,000
Indefinite-lived intangible asset impairment			38,000
Legacy Quaker [Member]
Finite Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	$ 1,100		$ 1,100		$ 1,100

Debt - Table (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt [Abstract]
Revolver	$ 376,676	$ 171,169
U.S. Term Loan	585,000	600,000
EURO Term Loan	147,584	151,188
Industrial development bonds	10,000	10,000
Bank lines of credit and other debt obligations	1,910	2,608
Total debt	1,121,170	934,965
Less: Debt issuance costs	(12,647)	(14,196)
Less: Short-term and current portion of long-term debts	(38,217)	(38,332)
Total long-term debt	$ 1,070,306	$ 882,437

Debt - Table Interest rates (Details)	Jun. 30, 2020	Dec. 31, 2019
Revolver [Member]
Debt Instrument [Line Items]
Long term Debt Weighted Average Interest Rate	167.00%	320.00%
U.S Term Loan [Member]
Debt Instrument [Line Items]
Long term Debt Weighted Average Interest Rate	210.00%	320.00%
EURO Term Loan [Member]
Debt Instrument [Line Items]
Long term Debt Weighted Average Interest Rate	150.00%	150.00%
Industrial development bonds [Member]
Debt Instrument [Line Items]
Long term Debt Weighted Average Interest Rate	526.00%	526.00%

Debt - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
Debt - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Aug. 01, 2019
Debt Instrument [Line Items]
Line of Credit Facility, Covenant Terms	The Company’s initial consolidated net debt to consolidated adjusted EBITDA ratio cannot exceed 4.25 to 1, with step downs in the permitted ratio over the course of the New Credit Facility. The Company’s consolidated adjusted EBITDA to interest expense ratio cannot be less than 3.0 to 1. The New Credit Facility also prohibits the payment of cash dividends if the Company is in default or if the amount of the dividend paid annually exceeds the greater of $50.0 million and 20% of consolidated adjusted EBITDA unless the ratio of consolidated net debt to consolidated adjusted EBITDA is less than 2.0 to 1, in which case there is no such limitation on amount.
Line of Credit Facility, Covenant Compliance	As of June 30, 2020 and December 31, 2019, the Company was in compliance with all of the New Credit Facility covenants.
Line of Credit Facility, Amount Outstanding	$ 376,676		$ 171,169
Industrial Development Revenue Bond	10,000
Bank lines of credit and other debt obligations	1,910		2,608
Debt Issuance Cost Capitalization	6,700		7,600
Line of Credit Inceased amount	$ 300,000			$ 300,000
Other off balance sheet arrangements	In addition to the bank letters of credit described in the “Credit facilities” subsection above, the Company’s only other off-balance sheet arrangements include certain financial and other guarantees. The Company’s total bank letters of credit and guarantees outstanding as of June 30, 2020 were approximately $14 million.
Derivative Variable Interest Rate	20.00%
Percentage of term loan principal amortization year three	7.50%
Percentage of term loan principal amortization year four and five	10.00%
Derivative Basis Spread On Variable Rate	1.64%
Letters Of Credit Outstanding Amount	$ 14,000
Derivative Fixed Interest Rate	3.10%
Debt Instrument Interest Rate During Period	2.50%
Percentage of term loan principal amortization year two	5.00%
Percentage of term loan principal amortization year one	5.00%
Derivative Liability, Notional Amount	$ 170,000
DeferredFinanceCostsNoncurrentGross	12,600		$ 14,200	23,700
Repayment of long-term debt	$ 18,702	$ 0
Minimum [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Commitment Fee Percentage	0.20%
Maximum [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Commitment Fee Percentage	0.30%
Revolver [Member]
Debt Instrument [Line Items]
Line of Credit Facility Maximum Borrowing Capacity				400,000
Letters Of Credit Outstanding Amount	$ 15,000
DeferredFinanceCostsNoncurrentGross				8,300
U.S Term Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility Maximum Borrowing Capacity				600,000
DeferredFinanceCostsNoncurrentGross				15,500
EURO Term Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility Maximum Borrowing Capacity				$ 150,000
Bank Lines of credit and other debt obligations [Member]
Debt Instrument [Line Items]
Line of Credit Remaining borrowing Capacity, net of letters of credit	37,000
Letters Of Credit Outstanding Amount	$ 8,000

Debt - Interest Expense Table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt [Abstract]
Interest Expense	$ 5,951	$ 1,255	$ 13,663	$ 2,427
Amortization of debt issuance costs	1,188	28	2,375	70
Total Interest Expense	$ 7,139	$ 1,283	$ 16,038	$ 2,497

Equity and Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jan. 01, 2020	Jan. 01, 2019
Beginning Balance	$ 1,162,032	$ 446,363	$ 1,242,366	$ 436,369
Cumulative effect of accounting change					$ (911)	$ (44)
Adjusted Beginning Balance					1,241,455	436,325
Net (loss) income	(7,722)	15,649	(36,066)	29,549
Amounts reported in other comprehensive income (loss)	12,261	310	(31,225)	1,857
Dividends, Common Stock	(6,853)	(5,135)	(13,687)	(10,068)
Purchase of noncontrolling affiliate shareholders			(1,047)	0
Disposition of Noncontrolling Interest			(751)
Share issuance and equity-based compensation plans	7,623	774	8,662	298
Ending Balance	1,167,341	457,961	1,167,341	457,961
Common Stock [Member]
Beginning Balance	17,752	13,334	17,735	13,338
Cumulative effect of accounting change					0	0
Adjusted Beginning Balance					17,735	13,338
Net (loss) income	0	0	0	0
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	0	0	0	0
Purchase of noncontrolling affiliate shareholders			0
Disposition of Noncontrolling Interest			0
Share issuance and equity-based compensation plans	48	4	65	0
Ending Balance	17,800	13,338	17,800	13,338
Additional Paid-in Capital [Member]
Beginning Balance	888,533	96,832	888,218	97,304
Cumulative effect of accounting change					0	0
Adjusted Beginning Balance					888,218	97,304
Net (loss) income	0	0	0	0
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	0	0	0	0
Purchase of noncontrolling affiliate shareholders			(707)
Disposition of Noncontrolling Interest			0
Share issuance and equity-based compensation plans	7,575	770	8,597	298
Ending Balance	896,108	97,602	896,108	97,602
Retained Earnings [Member]
Beginning Balance	376,853	413,992	412,979	405,125
Cumulative effect of accounting change					(911)	(44)
Adjusted Beginning Balance					412,068	405,081
Net (loss) income	(7,735)	15,591	(36,116)	29,435
Amounts reported in other comprehensive income (loss)	0	0	0	0
Dividends, Common Stock	(6,853)	(5,135)	(13,687)	(10,068)
Purchase of noncontrolling affiliate shareholders			0
Disposition of Noncontrolling Interest			0
Share issuance and equity-based compensation plans	0	0	0	0
Ending Balance	362,265	424,448	362,265	424,448
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(121,524)	(79,167)	(78,170)	(80,715)
Cumulative effect of accounting change					0	0
Adjusted Beginning Balance					(78,170)	(80,715)
Net (loss) income	0	0	0	0
Amounts reported in other comprehensive income (loss)	12,260	286	(31,094)	1,834
Dividends, Common Stock	0	0	0	0
Purchase of noncontrolling affiliate shareholders			0
Disposition of Noncontrolling Interest			0
Share issuance and equity-based compensation plans	0	0	0	0
Ending Balance	(109,264)	(78,881)	(109,264)	(78,881)
Noncontrolling Interest [Member]
Beginning Balance	418	1,372	1,604	1,317
Cumulative effect of accounting change					0	0
Adjusted Beginning Balance					$ 1,604	$ 1,317
Net (loss) income	13	58	50	114
Amounts reported in other comprehensive income (loss)	1	24	(131)	23
Dividends, Common Stock	0	0	0	0
Purchase of noncontrolling affiliate shareholders			(340)
Disposition of Noncontrolling Interest			(751)
Share issuance and equity-based compensation plans	0	0	0	0
Ending Balance	$ 432	$ 1,454	$ 432	$ 1,454

Equity and Noncontrolling Interest - Parentheticals (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stockholders Equity [Abstract]
Dividends Declared	$ 0.385	$ 0.385	$ 0.770	$ 0.755

Equity and Noncontrolling Interest - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	$ (121,524)	$ (79,167)	$ (78,170)	$ (80,715)
Other Comprehensive Income (Loss) Before Reclassifications	12,198	(190)	(48,900)	1,246
Amounts Reclassified from AOCI	507	689	24,841	1,326
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	12,705	499	(24,059)	2,572
Related Tax Amounts	(445)	(213)	(7,035)	(738)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	12,260	286	(31,094)	1,834
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(109,264)	(78,881)	(109,264)	(78,881)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(99,187)	(49,753)	(44,568)	(49,322)
Other Comprehensive Income (Loss) Before Reclassifications	10,550	(543)	(44,069)	(974)
Amounts Reclassified from AOCI	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	10,550	(543)	(44,069)	(974)
Related Tax Amounts	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	10,550	(543)	(44,069)	(974)
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(88,637)	(50,296)	(88,637)	(50,296)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(17,576)	(29,845)	(34,533)	(30,551)
Other Comprehensive Income (Loss) Before Reclassifications	(336)	(79)	492	81
Amounts Reclassified from AOCI	600	732	24,966	1,465
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	264	653	25,458	1,546
Related Tax Amounts	(51)	(131)	(8,288)	(318)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	213	522	17,170	1,228
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(17,363)	(29,323)	(17,363)	(29,323)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(4,301)	0	(320)	0
Other Comprehensive Income (Loss) Before Reclassifications	(144)	0	(5,315)	0
Amounts Reclassified from AOCI	0	0	0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(144)	0	(5,315)	0
Related Tax Amounts	33	0	1,223	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(111)	0	(4,092)	0
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	(4,412)	0	(4,412)	0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Balance at Beginning of Period	(460)	431	1,251	(842)
Other Comprehensive Income (Loss) Before Reclassifications	2,128	432	(8)	2,139
Amounts Reclassified from AOCI	(93)	(43)	(125)	(139)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	2,035	389	(133)	2,000
Related Tax Amounts	(427)	(82)	30	(420)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,608	307	(103)	1,580
Accumulated Other Comprehensive Income (Loss), Balance at End of Period	$ 1,148	$ 738	$ 1,148	$ 738

Fair Value Measurements - Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company Owned Life Insurance	$ 1,711	$ 1,782
Assets, Fair Value Disclosure	1,711	1,782
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	1,711	1,782
Assets, Fair Value Disclosure	1,711	1,782
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

Hedging Activities - Narrative (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	$ 5,730,000	$ 415,000
Derivative Liability, Notional Amount	170,000,000.0
Other Liabilities Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	$ 5,730,000	$ 415,000

Hedging Activities - Table (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Hedging Activities - Table (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net			$ 4,412,000		$ 320,000
Derivative Liability Fair Value Net1	$ 5,730,000		5,730,000		$ 415,000
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (483,000)	$ 0	$ (465,000)	$ 0

Commitments and Contingencies (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Loss Contingency Accrual At Carrying Value	$ 0.1	$ 0.2
ACP [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	1.0
ACP [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.1
SB Decking [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.5
Houghton Combination [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5.8	$ 6.6
Houghton Combination [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	6.0
Houghton Combination [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	5.0
Houghton Environmental Matters [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	6.0
Houghton Environmental Matters [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 5.0