Income Taxes - Income Tax Expense Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income taxes computed at the federal statutory rate	$ 215,417	$ 201,544	$ 296,419
State income taxes, net of federal income tax benefit	45,770	42,944	30,046
Excess tax benefits from equity-based compensation	101,466	77,478	58,681
Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act	0	(497)	62,702
Other, net	(12,465)	(3,978)	(21,096)
Total	$ 147,256	$ 162,535	$ 309,390