Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 765,860	$ 729,395	$ 708,226
Cost of goods sold	492,654	468,320	469,515
Selling, general and administrative expenses	195,850	189,832	175,487
Costs and Expenses, Total	688,504	658,152	645,002
Operating income	77,356	71,243	63,224
Other income, net	767	3,519	3,415
Interest expense	(2,371)	(2,922)	(4,283)
Interest income	2,541	986	592
Income before taxes and equity in net income of associated companies	78,293	72,826	62,948
Taxes on income before equity in net income of associated companies	23,539	20,489	15,575
Income before equity in net income of associated companies	54,754	52,337	47,373
Equity in net income of associated companies	3,543	6,514	2,867
Net income	58,297	58,851	50,240
Net income attributable to noncontrolling interest	1,805	2,512	2,835
Net income attributable to Quaker Chemical Corporation	$ 56,492	$ 56,339	$ 47,405
Per share data:
Net income attributable to Quaker Chemical Corporation Common Shareholders - basic	$ 4.27	$ 4.28	$ 3.64
Net income attributable to Quaker Chemical Corporation Common Shareholders - diluted	$ 4.26	$ 4.27	$ 3.63