Summary of Effects of Interest Rate Swap Agreements and Foreign Currency Foreign Exchange Contracts on Result of Operations (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI		$ 0	$ (3,925)	$ (2,805)
Designated As Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI	[1]	0	(3,925)	(2,805)
Designated As Hedging Instrument | Net Investment Hedge | Foreign Currency Foreign Exchange Contracts
Derivative Instruments Gain Loss [Line Items]
Gain/(Loss) recognized in AOCI		$ (22,097)	$ (18,328)	$ 75,059

[1] The amount of gain reclassified out of AOCI into interest expense, net was $3.4 million and $6.7 million during 2019 and 2018, respectively.