Condensed Consolidated Statement of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net Sales	$ 212,055	$ 194,909
Cost of goods sold	136,608	124,022
Gross profit	75,447	70,887
Selling, general and administrative expenses	50,007	48,054
Combination-related expenses	5,209	9,075
Operating income	20,231	13,758
Other (expense) income, net	(369)	(105)
Interest Expense	(1,692)	(656)
Interest Income	489	523
Income Before Taxes and Equity in Net Income of Associated Companies	18,659	13,520
Taxes on income before equity in net income of associated companies	5,556	6,865
Income before equity in net income of associated companies	13,103	6,655
Equity in net income of associated companies	(316)	959
Net Income	12,787	7,614
Less: Net income attributable to noncontrolling interest	55	622
Net Income Attributable to Quaker Chemical Corporation	$ 12,732	$ 6,992
Per share data:
Basic Earnings Per Common Share	$ 0.96	$ 0.53
Diluted Earnings per Common Share	0.95	0.52
Dividends Declared	$ 0.355	$ 0.345