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Financial Instruments - Derivative Instruments Which Were Not Designated as Hedging Instruments (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Foreign Currency Contracts [Member] | Other (income) expense, net [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of gain or (loss) on derivative $ 9,319 $ 557