Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 449,072	$ 367,224	$ 1,314,117	$ 1,031,825
Cost of goods sold (excluding amortization expense - See Note 14)	303,941	227,032	858,341	660,396
Gross profit	145,131	140,192	455,776	371,429
Selling, general and administrative expenses	104,215	97,037	317,204	282,405
Indefinite-lived intangible asset impairment	0	0	0	38,000
Restructuring and related charges	(880)	1,383	593	3,585
Combination, integration and other acquisition-related	5,786	6,913	18,259	22,786
Operating income (loss)	36,010	34,859	119,720	24,653
Other income (expense), net	647	(239)	19,344	(22,407)
Interest expense, net	(5,637)	(6,837)	(16,725)	(22,109)
Income (loss) before taxes and equity in net income of associated companies	31,020	27,783	122,339	(19,863)
Taxes on income (loss) before equity in net income of associated companies	795	2,245	26,702	(7,603)
Income (loss) before equity in net income of associated companies	30,225	25,538	95,637	(12,260)
Equity in net income of associated companies	848	1,804	7,668	3,536
Net income (loss)	31,073	27,342	103,305	(8,724)
Less: Net income attributable to noncontrolling interest	15	38	62	88
Net income (loss) attributable to Quaker Chemical Corporation	$ 31,058	$ 27,304	$ 103,243	$ (8,812)
Per share data:
Net income (loss) attributable to Quaker Chemical Corporation common shareholders - basic	$ 1.74	$ 1.53	$ 5.78	$ (0.50)
Net income (loss) attributable to Quaker Chemical Corporation common shareholders - diluted	1.73	1.53	5.76	(0.50)
Dividends declared	$ 0.415	$ 0.395	$ 1.205	$ 1.165