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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 Currency Forward Contracts - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign currency forward contracts —asset position $ 680 $ 40
Foreign currency forward contracts —liability position (342) (246)
Total foreign currency derivative instruments 338 (206)
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign currency forward contracts —asset position 680 40
Foreign currency forward contracts —liability position (342) (246)
Total foreign currency derivative instruments $ 338 $ (206)