Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 429,783	$ 378,561
Cost of goods sold	273,589	244,710
Gross profit	156,194	133,851
Selling, general and administrative expenses	104,310	98,701
Indefinite-lived intangible asset impairment	0	38,000
Restructuring and related charges	1,175	1,716
Combination, integration and other acquisition-related expenses	5,815	7,878
Operating income (loss)	44,894	(12,444)
Other income (expense), net	4,687	(21,175)
Interest expense, net	(5,470)	(8,461)
Income (loss) before taxes and equity in net income of associated companies	44,111	(42,080)
Taxes on income (loss) before equity in net income of associated companies	10,689	(13,070)
Income (loss) before equity in net income of associated companies	33,422	(29,010)
Equity in net income of associated companies	5,210	666
Net income (loss)	38,632	(28,344)
Less: Net income attributable to noncontrolling interest	17	37
Net income (loss) attributable to Quaker Chemical Corporation	$ 38,615	$ (28,381)
Per share data:
Basic earnings (loss) per common share	$ 2.16	$ (1.60)
Diluted earnings (loss) per common share	2.15	(1.60)
Dividends declared	$ 0.395	$ 0.385