Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 19,771	$ 11,704	$ 51,928	$ 31,659
Currency Translation Adjustments	(6,859)	5,764	(17,111)	18,528
Defined Benefit Retirement Plans	678	62	2,258	2,171
Unrealized (loss) gain on Available-for-Sale Securities	162	286	(493)	453
Other Comprehensive income (loss)	(6,019)	6,112	(15,346)	21,152
Comprehensive Income	13,752	17,816	36,582	52,811
Less: Comprehensive Income Attributable to Noncontrolling Interest	(43)	(409)	(146)	(2,037)
Comprehensive Income Attributable to Quaker Chemical Corporation	$ 13,709	$ 17,407	$ 36,436	$ 50,774