Summary of Lease Costs Recognized Under Topic 842 and Other Information Pertaining to Operating Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease cost
Operating lease cost	$ 28,737	$ 18,978
Variable lease cost	18,742	17,065
Total lease cost	47,479	36,043
Other information
Operating lease payments	24,449	19,344
Lease liabilities arising from obtaining right of use assets	$ 13,225	$ 59,327
Weighted average remaining lease term	3 years 6 months	4 years 7 months 6 days
Weighted average discount rate	7.60%	7.60%