Summary of Effects of Interest Rate Swap Agreements and Foreign Currency Foreign Exchange Contracts on Result of Operations (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI					$ (3,925)
Designated As Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI	[1]	$ 0	$ 0	$ 0	(3,925)
Designated As Hedging Instrument | Net Investment Hedge | Foreign Currency Foreign Exchange Contracts
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI		$ (28,244)	$ 33,927	$ 15,291	$ 79,584

[1] The amount of gain reclassified out of AOCI into interest expense, net was $0 during each of the three-month periods ended September 30, 2020 and 2019, respectively, and $0 and $3.4 million during the nine-month periods ended September 30, 2020 and 2019, respectively.