Condensed Consolidated Statement of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net Sales	$ 176,193	$ 177,638
Cost of goods sold	113,585	117,843
Gross profit	62,608	59,795
Selling, general and administrative expenses	45,197	43,093
Operating income	17,411	16,702
Other Income, Net	346	341
Interest Expense	(744)	(1,174)
Interest Income	169	123
Income Before Taxes and Equity in Net Income of Associated Companies	17,182	15,992
Taxes on income before equity in net income of associated companies	4,133	3,445
Income before equity in net income of associated companies	13,049	12,547
Equity in net income of associated companies	1,142	565
Net Income	14,191	13,112
Less: Net income attributable to noncontrolling interest	572	747
Net Income Attributable to Quaker Chemical Corporation	$ 13,619	$ 12,365
Per share data:
Basic Earnings Per Common Share	$ 1.04	$ 0.96
Diluted Earnings per Common Share	$ 1.04	$ 0.95
Dividends Declared	$ 0.245	$ 0.24