Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	$ 8,840,382	$ 7,219,279	$ 6,849,790
Other comprehensive income (loss)	21,302	11,070	(158,389)
Ending balance	10,634,118	8,840,382	7,219,279
Adjustment from adoption of new accounting standard
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	(900)	(5,973)	269,776
Ending balance		(900)	(5,973)
AOCI
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	(934,613)	(945,702)	(785,189)
Other comprehensive income (loss)	21,245	11,089	(158,389)
Ending balance	(913,368)	(934,613)	(945,702)
AOCI \| Adjustment from adoption of new accounting standard
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance			(2,124)
Foreign currency translation adjustment ("CTA") gain (loss)
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	(1,056,918)	(998,603)	(576,860)
Other comprehensive income (loss)	548,503	(58,315)	(421,743)
Ending balance	(508,415)	(1,056,918)	(998,603)
Unrealized gain (loss) on cash flow hedges
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	15,638	19,480	(24,191)
Other comprehensive income (loss)		(3,842)	43,671
Ending balance		15,638	19,480
Unrealized gain (loss) on cash flow hedges
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Other comprehensive income (loss)	(82,790)
Ending balance	(67,152)
Net investment hedge CTA gain (loss)
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	107,619	34,325	(185,303)
Other comprehensive income (loss)	(444,553)	73,294	219,628
Ending balance	(336,934)	107,619	34,325
Unrealized gain (loss) on available for sale securities
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	0	0	2,124
Other comprehensive income (loss)	0	0	0
Ending balance	0	0	0
Unrealized gain (loss) on available for sale securities \| Adjustment from adoption of new accounting standard
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance		(2,124)
Ending balance			(2,124)
Unrealized gain (loss) on available for sale securities \| Adjustment from adoption of new accounting standard \| Accounting Standards Update 2016-01
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance		2,100
Ending balance			2,100
Net actuarial loss on defined benefit plans
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Beginning balance	(952)	(904)	(959)
Other comprehensive income (loss)	(85)	48	(55)
Ending balance	$ (867)	$ (952)	$ (904)