Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 14,371	$ 15,696	$ 39,787	$ 43,853
Less: Income Allocated to Participating Securities	(121)	(140)	(350)	(384)
Net Income Available to Common Shareholders	$ 14,250	$ 15,556	$ 39,437	$ 43,469
Basic Weighted Average Common Shares Outstanding	13,209,119	13,133,668	13,206,122	13,114,553
Effect of Dilutive Securities	13,333	22,673	16,181	21,147
Diluted Weighted Average Common Shares Outstanding	13,222,452	13,156,341	13,222,303	13,135,700
Diluted Earnings per Common Share	$ 1.08	$ 1.18	$ 2.98	$ 3.31