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

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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