Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal
Current	$ 37,551	$ 35,324	$ 45,996
Deferred	8,440	3,149	(9,759)
Federal income tax expense, total	45,991	38,473	36,237
State
Current	18,432	13,711	13,262
Deferred	(69)	1,333	(2,272)
State and local income tax expense, total	18,363	15,044	10,990
Foreign
Current	193,996	150,261	151,312
Deferred		0	0
Foreign income tax expense, total	193,996	150,261	151,312
Total
Current	249,979	199,296	210,570
Deferred	8,371	4,482	(12,031)
Income tax expense	$ 258,350	$ 203,778	$ 198,539