Income Taxes - Summary of Provision for Income Taxes and U.S. Federal Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed “expected” tax expense	$ 226,342		$ 229,976	$ 312,756
Change in valuation allowance	(28,614)		25,193	18,289
Foreign income tax differential	(15,816)		9,921	(38,695)
State taxes net of federal benefits	12,482		20,480	12,884
Foreign-sourced nontaxable income	0		(28,861)	(8,836)
Foreign withholding tax	20,360		20,569	9,362
IRC Section 199 deduction	0		0	(8,844)
Excess tax benefits related to stock-based compensation	(38,156)		(19,255)	(18,058)
Revaluation of capital loss deferred tax asset	(24,279)		0	0
One-time transition tax	0		0	195,779
Foreign tax credit- one-time transition tax	0		17,385	(113,955)
Deferred tax effects	0		7,128	(209,965)
Sub-part F Income/GILTI	49,859		40,200	3,741
Foreign tax credits	(38,657)		(52,095)	0
Other	19,225		13,001	(1,068)
Total provision	$ 182,746	[1]	$ 283,642	$ 153,390	[2]
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent [Abstract]
Computed "expected" tax expense, rate	21.00%		21.00%	35.00%
Change in valuation allowance, rate	(2.70%)		2.80%	2.00%
Foreign income tax differential, rate	(1.40%)		0.90%	(4.30%)
State taxes net of federal benefits, rate	1.20%		1.90%	1.40%
Foreign-sourced nontaxable income, rate			(2.60%)	(1.00%)
Foreign Withholding Tax, rate	1.90%		1.90%	1.00%
IRC Section 199 deduction, rate	0.00%		0.00%	(1.00%)
Excess tax benefits related to stock-based compensation, rate	(3.50%)		(1.80%)	(2.00%)
Revaluation of capital loss deferred tax asset, rate	(2.30%)		0.00%	0.00%
One-time transition tax, rate	0.00%		0.00%	21.90%
Foreign tax credit - one-time transition tax	0		0.016	(0.128)
Deferred tax effects, rate	0		0.001	(0.235)
Sub-part F Income/GILTI, rate	4.60%		3.70%	0.40%
Foreign tax credits, rate	(3.60%)		(4.80%)	0.00%
Other, rate	1.80%		1.20%	0.10%
Provision for income taxes, rate	17.00%		25.90%	17.20%

[1] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using a modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 14.

[2] The Company applied the modified retrospective transition method when adopting ASC 606, therefore the Company's 2017 prior period results were not restated to reflect ASC 606.