Earnings Per Share - Diluted (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 15,696	$ 12,551	$ 43,853	$ 42,253
Less: Income Allocated to Participating Securities	(140)	(109)	(384)	(357)
Net Income Available to Common Shareholders	$ 15,556	$ 12,442	$ 43,469	$ 41,896
Basic Weighted Average Common Shares Outstanding	13,133,668	13,062,417	13,114,553	13,034,289
Effect of Dilutive Securities	22,673	22,488	21,147	25,909
Diluted Weighted Average Common Shares Outstanding	13,156,341	13,084,905	13,135,700	13,060,198
Diluted Earnings per Common Share	$ 1.18	$ 0.95	$ 3.31	$ 3.21