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Derivative Instruments - Not Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) - Not designated as hedging instruments - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments $ 25,505 $ (18,774) $ 51,460 $ 5,943
Foreign Exchange Forward | Other non-operating (expense) income, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments 25,389 (17,989) 50,958 5,603
Foreign Exchange Forward | Cost of Sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments 116 473 502 1,598
Currency Swap | Other non-operating (expense) income, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments $ 0 $ (1,258) $ 0 $ (1,258)