Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 12,732	$ 6,992
Less: Income Allocated to Participating Securities	(62)	(54)
Net Income Available to Common Shareholders	$ 12,670	$ 6,938
Basic Weighted Average Common Shares Outstanding	13,245,026	13,176,096
Effect of Dilutive Securities	33,580	44,965
Diluted Weighted Average Common Shares Outstanding	13,278,606	13,221,061
Diluted Earnings per Common Share	$ 0.95	$ 0.52