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Term Loan and Revolving Credit Facility (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of debt and short-term borrowings    
Debt $ 102,500  
Less: Current portion of long-term debt 30,000 27,500
Long-term debt 72,500  
Term loan [Member]
   
Schedule of debt and short-term borrowings    
Debt 77,500  
Revolving credit facility [Member]
   
Schedule of debt and short-term borrowings    
Debt $ 25,000