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Derivatives and Other Financial Instruments - Schedule Of Fair Value And Location Of Hedges In The Consolidated Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Prepaid And Other [Member]
   
Derivative [Line Items]    
Net derivatives at fair value $ 136 $ 121
Prepaid And Other [Member] | Foreign Exchange Contracts [Member]
   
Derivative [Line Items]    
Foreign exchange forward contracts in asset positions 136 121
Foreign exchange forward contracts in liability positions 0 0
Accrued Expenses [Member]
   
Derivative [Line Items]    
Net derivatives at fair value (102) (131)
Accrued Expenses [Member] | Foreign Exchange Contracts [Member]
   
Derivative [Line Items]    
Foreign exchange forward contracts in asset positions 0 0
Significant Other Observable Inputs (Level 2) [Member] | Foreign Exchange Forward Contracts [Member]
   
Derivative [Line Items]    
Foreign exchange forward contracts in liability positions $ (102) $ (131)