Derivatives and Hedge Accounting - Summary of Fair Value of Foreign Currency Exchange Contracts (Detail) - Foreign exchange contracts - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivative designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	$ 4,022	$ 10,892
Derivative designated as hedging instruments | Other assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	1,971	7,360
Derivative designated as hedging instruments | Accrued expense and other current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	3,137	481
Derivative designated as hedging instruments | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	3,075	322
Derivative not designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	37	46
Derivative not designated as hedging instruments | Accrued expense and other current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	$ 67	$ 74