Income Taxes - Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Expected federal income tax at statutory rate	$ 100,606	$ 74,400	$ 66,790
State income taxes before valuation allowance, net of federal tax effect	(1,333)	(1,539)	(1,563)
Effect of foreign source income	(15,862)	(7,877)	(1,362)
Tax contingencies	4,696	1,688	1,785
Valuation allowance	9,984	9,281	2,051
U.S. federal research credit	(8,469)	(7,204)	(6,514)
Equity compensation	(8,899)	(8,231)	(1,411)
Foreign derived intangible income	(6,496)	(1,153)	(7,851)
Legal entity restructuring capital loss	(5,079)	0	0
Legal entity restructuring dividends received deduction	0	0	9,398
Other items, net	802	(47)	1,866
Income tax expense	$ 69,950	$ 59,318	$ 63,189