Condensed Consolidated Statement of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net Sales	$ 222,022	$ 212,918	$ 656,039	$ 609,010
Cost of goods sold	140,929	138,142	418,562	391,512
Gross profit	81,093	74,776	237,477	217,498
Selling, general and administrative expenses	53,270	51,092	157,360	148,740
Combination-related expenses	2,904	9,675	12,404	23,088
Operating income	24,919	14,009	67,713	45,670
Other (expense) income, net	(523)	249	(631)	(1,427)
Interest Expense	(1,510)	(793)	(4,804)	(2,229)
Interest Income	521	762	1,581	1,825
Income before taxes and equity in net income of associated companies	23,407	14,227	63,859	43,839
Taxes on income before equity in net income of associated companies	4,330	3,140	13,554	14,229
Income before equity in net income of associated companies	19,077	11,087	50,305	29,610
Equity in net income of associated companies	694	617	1,623	2,049
Net Income	19,771	11,704	51,928	31,659
Less: Net income attributable to noncontrolling interest	81	562	260	1,619
Net Income Attributable to Quaker Chemical Corporation	$ 19,690	$ 11,142	$ 51,668	$ 30,040
Per share data:
Basic Earnings Per Common Share	$ 1.48	$ 0.84	$ 3.88	$ 2.26
Diluted Earnings per Common Share	1.47	0.83	3.87	2.25
Dividends Declared	$ 0.37	$ 0.355	$ 1.095	$ 1.055