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Financial Derivatives and Hedging Activities - Fair Values of Derivative Instruments (Detail) (Forward Foreign Currency Exchange Contracts [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 321  
Designated as Hedging [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 155 1,163
Not Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 15 36
Not Designated as Hedging [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value $ 80 $ 46