Condensed Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Revenue Recognized Under Net Reporting Arrangements	$ 10,573	$ 8,778
Kelko (Venezuela) [Member]
Schedule of Equity Method Investments [Line Items]
Description Of Foreign Currency Devaluation Effects		In February 2013, the Venezuelan Government announced a devaluation of the Bolivar Fuerte. Accordingly, the Company recorded a charge of $357, or $0.03 per diluted share, during the first quarter of 2013.
Effect Of Currency Devaluation, Amount		357
Effect Of Currency Devaluation, Per Diluted Share		$ 0.03
Primex [Member]
Schedule of Equity Method Investments [Line Items]
Impact of Restatement on Opening Retained Earnings, Net of Tax	$ 335