Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act	$ 0	$ (497)	$ 62,702
Excess tax benefits from equity-based compensation	101,466	77,478	$ 58,681
Estimated federal taxable income	$ 638,723	$ 640,195
Statutory federal income tax rate	21.00%	35.00%	35.00%
Effective tax rate	14.36%	16.94%	36.53%
Unrecognized tax benefits that would affect effective tax rate	$ 31,090
Reversal of accrued interest on unrecognized tax benefits	1,467	$ 1,384	$ 1,065
Total accrued interest on unrecognized tax benefits	15,724	$ 17,191
Reduction in unrecognized tax benefits	$ 6,951