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Condensed Financial Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Kelko (Venezuela) [Member]
Jun. 30, 2013
Reduction in Taxes [Member]
Dec. 31, 2003
Taxes and Licenses [Member]
Organization Consolidation And Presentation Of Financial Statements [Abstract]              
Revenue Recognized Under Net Reporting Arrangements     $ 19,338 $ 20,944      
Inflationary Percentage     100.00%        
Effect Of Currency Devaluation Per Diluted Share $ 0.03            
Description Of Foreign Currency Devaluation Effects     On January 8, 2010, the Venezuelan government announced the devaluation of the Bolivar Fuerte and the establishment of a two-tiered exchange structure. In February 2013, the Venezuelan Government announced a further devaluation of the Bolivar Fuerte. Accordingly, the Company recorded a charge of approximately $0.03 per diluted share during the first quarter of 2013.        
Other Income [Line Items]              
Other Income           2,057  
Other Expense             2,000
Interest Income, Other           483  
Provision for Doubtful Accounts   1,156          
CFO Transition Costs   $ 609          
Schedule of Equity Method Investments [Line Items]              
Equity Method Investment, Ownership Percentage         50.00%