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Fair Value of Financial Instruments and Concentration of Credit Risk (Details Textual) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Principal term loan $ 130,000,000  
Foreign currency hedge agreements
   
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Cumulative unrealized pre-tax loss on derivative contracts included in accumulated other comprehensive loss 400,000 28,000
Aggregate notional amount of Foreign currency contracts outstanding 45,100,000 45,500,000
Interest rate cap
   
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Term loan principal outstanding notional amount $ 103,700,000  
Interest rate cap | Minimum
   
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Interest rate swap contracts 3.30%  
Interest rate cap | Maximum
   
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Interest rate payment determined by maximum LIBOR rate 7.50%  
Interest rate swap contracts 4.20%  
Senior Credit Facilities
   
Fair Value of Financial Instruments and Concentration of Credit Risk (Textual) [Abstract]    
Percentage of outstanding principal on term loans comprising interest rate agreements 35.00%