Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 435,262	$ 286,040	$ 865,045	$ 664,601
Cost of goods sold (excluding amortization expense - See Note 14)	280,811	188,654	554,400	433,364
Gross profit	154,451	97,386	310,645	231,237
Selling, general and administrative expenses	108,679	86,667	212,989	185,368
Indefinite-lived intangible asset impairment	0	0	0	38,000
Restructuring and related charges	298	486	1,473	2,202
Combination, integration and other acquisition-related expenses	6,658	7,995	12,473	15,873
Operating income (loss)	38,816	2,238	83,710	(10,206)
Other income (expense), net	14,010	(993)	18,697	(22,168)
Interest expense, net	(5,618)	(6,811)	(11,088)	(15,272)
Income (loss) before taxes and equity in net income of associated companies	47,208	(5,566)	91,319	(47,646)
Taxes on income (loss) before equity in net income of associated companies	15,218	3,222	25,907	(9,848)
Income (loss) before equity in net income of associated companies	31,990	(8,788)	65,412	(37,798)
Equity in net income of associated companies	1,610	1,066	6,820	1,732
Net income (loss)	33,600	(7,722)	72,232	(36,066)
Less: Net income attributable to noncontrolling interest	30	13	47	50
Net income (loss) attributable to Quaker Chemical Corporation	$ 33,570	$ (7,735)	$ 72,185	$ (36,116)
Per share data:
Net income (loss) attributable to Quaker Chemical Corporation common shareholders - basic	$ 1.88	$ (0.43)	$ 4.04	$ (2.03)
Net income (loss) attributable to Quaker Chemical Corporation common shareholders - diluted	1.88	(0.43)	4.03	(2.03)
Dividends declared	$ 0.395	$ 0.385	$ 0.790	$ 0.770