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Schedule of Derivative Instruments in Statement of Financial Position at Fair Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Derivatives, Fair Value [Line Items]    
Derivative assets (liabilities), net $ (37) $ (149)
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Prepayments    
Derivatives, Fair Value [Line Items]    
Derivative assets 109 220
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ (146) $ (369)