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Financial Derivatives - Effect of Company's Derivative Instruments (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Revenues $ 411,166 $ 402,925
Gains (losses) recognized from derivatives (246) (33)
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedges [Member] | Foreign Currency Contracts [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized in AOCI: (311) 1,183
Revenues [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedges [Member] | Foreign Currency Contracts [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) reclassified from AOCI: 926 (501)
Other Income (Expense), Net [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Foreign Currency Contracts [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) recognized from derivatives $ (246) $ (33)