Income Taxes - Summary of Provision for Income Taxes and U.S. Federal Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed “expected” tax expense	$ 185,330	$ 226,342	$ 229,976
Change in valuation allowance	25,932	(28,614)	25,193
Foreign income tax differential	(20,852)	(15,816)	9,921
State taxes net of federal benefits	7,489	12,482	20,480
Increase in tax expense due to uncertain tax positions	14,848	0	0
Foreign-sourced nontaxable income	0	0	(28,861)
Foreign withholding tax	15,630	20,360	20,569
Excess tax benefits related to stock-based compensation	(58,942)	(38,156)	(19,255)
Revaluation of capital loss deferred tax asset	0	(24,279)	0
Foreign tax credit- one-time transition tax	0	0	17,385
Deferred tax effects	0	0	7,128
Sub-part F Income/GILTI	34,990	49,859	40,200
Foreign tax credits	(30,497)	(38,657)	(52,095)
Other	4,381	19,225	13,001
Total provision	$ 178,309	$ 182,746	$ 283,642	[1]
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent [Abstract]
Computed “expected” tax expense	21.00%	21.00%	21.00%
Change in valuation allowance	2.90%	(2.70%)	2.80%
Foreign income tax differential	(2.30%)	(1.40%)	0.90%
State taxes net of federal benefits	0.80%	1.20%	1.90%
Increase in tax expense due to uncertain tax positions	1.70%	0.00%	0.00%
Foreign-sourced nontaxable income	0.00%	0.00%	(2.60%)
Foreign withholding tax	1.80%	1.90%	1.90%
Excess tax benefits related to stock-based compensation	(6.70%)	(3.50%)	(1.80%)
Revaluation of capital loss deferred tax asset	0.00%	(2.30%)	0.00%
Foreign tax credit- one-time transition tax	0	0	0.016
Deferred tax effects	0	0	0.001
Sub-part F Income/GILTI	4.00%	4.60%	3.70%
Foreign tax credits	(3.50%)	(3.60%)	(4.80%)
Other	0.50%	1.80%	1.20%
Provision for income taxes	20.20%	17.00%	25.90%

[1] The Company applied the modified retrospective transition method when adopting ASU 2016-02 "Leases", therefore the Company's 2018 prior results were not restated to reflect ASU 2016-02. Refer to footnote 14.