Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 130,680	$ 162,883	$ 130,144
State	35,474	45,488	36,457
Foreign	77,541	60,376	76,910
Deferred:
Federal	2,048	(21,617)	13,295
State	801	(11,273)	5,427
Foreign	(30,571)	(23,049)	(17,129)
Income tax expense, total	$ 215,973	$ 212,808	$ 245,104