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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Forward exchange contracts, assets $ 44 $ 920
Forward exchange contracts, liabilities (1,161) (656)
Total net derivative asset (liability) designated as hedging instruments (1,117) 264
Derivatives Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Forward exchange contracts, assets 44 920
Forward exchange contracts, liabilities (1,161) (656)
Total net derivative asset (liability) designated as hedging instruments $ (1,117) $ 264