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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Currency Contract, Asset, Fair Value Disclosure   $ 13
Assets, Fair Value Disclosure   13
Foreign Currency Contracts, Liability, Fair Value Disclosure 20 394
Accrued Liabilities, Fair Value Disclosure 1,672 2,289
Liabilities, Fair Value Disclosure 1,692 2,683
Fair Value, Inputs, Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Currency Contract, Asset, Fair Value Disclosure   13
Assets, Fair Value Disclosure   13
Foreign Currency Contracts, Liability, Fair Value Disclosure 20 394
Accrued Liabilities, Fair Value Disclosure 0 0
Liabilities, Fair Value Disclosure 20 394
Fair Value, Inputs, Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Currency Contract, Asset, Fair Value Disclosure   0
Assets, Fair Value Disclosure   0
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0
Accrued Liabilities, Fair Value Disclosure 1,672 2,289
Liabilities, Fair Value Disclosure $ 1,672 $ 2,289