Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 15,591	$ 19,246	$ 29,435	$ 31,978
Less: Income Allocated to Participating Securities	(34)	(83)	(81)	(147)
Net Income Available to Common Shareholders	$ 15,557	$ 19,163	$ 29,354	$ 31,831
Basic Weighted Average Common Shares Outstanding	13,304,248	13,267,504	13,297,953	13,256,327
Basic Earnings Per Common Share	$ 1.17	$ 1.44	$ 2.21	$ 2.40