Components of Income Tax Expense Benefit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current, Federal	$ 225,663	$ 195,862	$ 352,433
Current, Foreign	9,284	13,699	10,625
Current, State	40,152	37,555	37,421
Current, Total	275,099	247,116	400,479
Deferred, Federal	(27,073)	(6,216)	(36,998)
Deferred, Foreign	1,874	(666)	24
Deferred, State	(11,106)	(3,592)	192
Deferred, Total	(36,305)	(10,474)	(36,782)
Provision for income taxes	$ 238,794	$ 236,642	$ 363,697