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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Derivative assets   $ 168
Derivative liabilities   (6,198)
Total net derivative (liability) asset designated as hedging instruments $ (8,188) (6,030)
Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total net derivative (liability) asset designated as hedging instruments (18) 149
Foreign Exchange Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 85  
Derivative liabilities (8,273)  
Foreign Exchange Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 85 168
Derivative liabilities (8,273) (6,198)
Interest Rate Hedge [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 8,170 6,179
Interest Rate Hedge [Member] | Derivatives Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets $ 8,170 $ 6,179