Income Taxes - Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Roll Forward
Balance at beginning of year	$ 47,965	$ 50,920	$ 48,605
Additions based on tax positions related to current year	52,853	4,138	9,272
Reductions based on tax positions related to current year	0	0	0
Additions based on tax positions related to prior years	2,405	223	2,106
Reductions based on tax positions related to prior years	(3,060)		(2,863)
Reductions due to settlements with taxing authorities			(1,514)
Reductions due to statute of limitations lapse	(5,027)	(7,316)	(4,686)
Balance at end of year	$ 95,136	$ 47,965	$ 50,920