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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal tax computed at U.S. statutory income tax rate									$ 128,292	$ 142,430	$ 143,251
Enactment of the 2017 Tax Cuts and Jobs Act											(6,059)
Foreign currency exchange impact on distributed earnings										(3,229)	7,495
GILTI, net of foreign tax credits									13,319	10,523	13,727
State income tax, net of federal income tax benefit									2,415	3,459	2,910
Net effect of foreign operations									(48,962)	(52,727)	(57,003)
Effect of stock-based compensation									(6,798)	(9,211)	(9,089)
Other, net									1,077	(5,204)	(6,880)
Provision for income taxes	$ 38,940	$ 23,668	$ 22,434	$ 4,301	$ 23,719	$ 26,605	$ 27,325	$ 8,392	$ 89,343	$ 86,041	$ 88,352

X

- Definition

Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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