Income Taxes - Rollforward of Total Gross Unrecognized Tax Benefit (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]
Unrecognized tax benefit as of beginning of period	$ 46,320	$ 46,650	$ 33,262
Tax positions related to current year, additions for uncertain tax positions	27,710	20,592	19,012
Tax positions related to prior year, Additions for uncertain tax positions	5,471	10,201	143
Tax positions related to prior year, Decreases for uncertain tax positions	(5,804)	(29,977)	(3,783)
Tax positions related to prior year, Reductions due to lapse of applicable statute of limitations	(8,986)	0	(1,984)
Tax positions related to prior year, Settlements with tax authorities	(1,416)	(1,146)	0
Unrecognized tax benefit as of end of period	$ 63,295	$ 46,320	$ 46,650