Earnings Per Share - Basic (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Net Income Attributable to Quaker Chemical Corporation	$ 13,619	$ 12,365
Less: Income Allocated to Participating Securities	(111)	(200)
Net Income Available to Common Shareholders	$ 13,508	$ 12,165
Basic Weighted Average Common Shares Outstanding	13,001,963	12,730,682
Basic Earnings Per Common Share	$ 1.04	$ 0.96

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details