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Derivatives and Hedge Accounting - Narrative (Detail)
€ in Thousands, £ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Dec. 31, 2019
GBP (£)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
EUR (€)
Dec. 31, 2018
GBP (£)
Derivative Instruments, Gain (Loss) [Line Items]            
Net derivative losses which could be reclassified into earnings within the next 12 months $ 2,421,000          
Maximum outstanding term of cash flow hedges 45 months          
Derivatives Designated as Hedging Instruments | Derivatives in cash flow hedging relationships | Foreign currency exchange contracts            
Derivative Instruments, Gain (Loss) [Line Items]            
Foreign exchange contracts outstanding $ 410,390,000     $ 362,435,000    
Derivative not designated as hedging instruments | Foreign currency exchange contracts            
Derivative Instruments, Gain (Loss) [Line Items]            
Foreign exchange contracts outstanding 124,045,000 € 1,289 £ 10,843 125,503,000 € 512 £ 15,616
Forward contracts | Derivatives Designated as Hedging Instruments | Derivatives in cash flow hedging relationships | Foreign currency exchange contracts            
Derivative Instruments, Gain (Loss) [Line Items]            
Foreign exchange contracts outstanding $ 4,300,000     $ 6,900