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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Derivative assets   $ 168
Derivative liabilities   (6,198)
Total net derivative asset designated as hedging instruments $ 2,844 (6,030)
Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total net derivative asset designated as hedging instruments 11,409 149
Foreign Exchange Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 3,666  
Derivative liabilities (822)  
Foreign Exchange Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 3,666 168
Derivative liabilities (822) (6,198)
Interest Rate Hedge [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 8,565 6,179
Interest Rate Hedge [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets $ 8,565 $ 6,179