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Fair Value of Derivative Instruments and Location in the Balance Sheets (Detail) - Foreign Exchange Forward And Option Contracts [Member] - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative instruments, assets derivatives $ 400  
Derivative instruments, liabilities derivatives 461 $ 1,007
Derivatives Designated as Hedging Instruments    
Derivatives, Fair Value [Line Items]    
Derivative instruments, assets derivatives 400  
Derivative instruments, liabilities derivatives 445 944
Not Designated as Hedging Instrument, Economic Hedge [Member]    
Derivatives, Fair Value [Line Items]    
Derivative instruments, liabilities derivatives $ 16 $ 63