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Fair Value of Financial Instruments - Foreign Currency Exchange Contracts Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - Foreign Exchange Contract - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign currency forward contracts—asset position $ 1,408 $ 680
Foreign currency forward contracts—liability position (5,132) (342)
Foreign currency forward contracts, net (3,724) 338
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign currency forward contracts—asset position 1,408 680
Foreign currency forward contracts—liability position (5,132) (342)
Foreign currency forward contracts, net $ (3,724) $ 338