Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 367,224	$ 325,130	$ 1,031,825	$ 742,209
Cost of goods sold	227,032	220,073	660,396	486,224
Gross profit	140,192	105,057	371,429	255,985
Selling, general and administrative expenses	97,037	80,812	282,405	182,293
Indefinite-lived intangible asset impairment	0	0	38,000	0
Restructuring and related charges	1,383	24,045	3,585	24,045
Combination, integration and other acquisition-related expenses	6,913	14,702	22,786	23,789
Operating income (loss)	34,859	(14,502)	24,653	25,858
Other (expense) income, net	(239)	203	(22,407)	(389)
Interest expense, net	(6,837)	(6,102)	(22,109)	(7,611)
Income (loss) before taxes and equity in net income of associated companies	27,783	(20,401)	(19,863)	17,858
Taxes on income (loss) before equity in net income of associated companies	2,245	(5,633)	(7,603)	4,096
Income (loss) before equity in net income of associated companies	25,538	(14,768)	(12,260)	13,762
Equity in net income of associated companies	1,804	1,787	3,536	2,806
Net income (loss)	27,342	(12,981)	(8,724)	16,568
Less: Net income attributable to noncontrolling interest	38	72	88	186
Net income (loss) attributable to Quaker Chemical Corporation	$ 27,304	$ (13,053)	$ (8,812)	$ 16,382
Per share data:
Basic earnings (loss) per common share	$ 1.53	$ (0.80)	$ (0.50)	$ 1.15
Diluted earnings (loss) per common share	1.53	(0.80)	(0.50)	1.14
Dividends Declared	$ 0.395	$ 0.385	$ 1.165	$ 1.140