Leases - Schedule of Quantitative Information Related to Leases (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease expenses
Fixed lease expenses - operating	[1]	$ 11,442	$ 12,379	$ 12,869
Variable lease expenses - operating	[1]	3,173	6,389	8,534
Sublease income	[1]	(1,359)	(2,347)	(4,179)
Total lease expenses	[1]	13,256	16,421	17,224
Other information
Gross operating cash flows for operating leases	[2]	(18,390)	(23,577)	(32,827)
Operating cash flows from subleases	[2]	$ 1,430	$ 2,254	$ 4,351
Weighted average remaining lease term (in months) – operating leases		69 months	70 months	76 months
Weighted average discount rate – operating leases		4.90%	4.90%	5.10%

[1] Lease expense and sublease income represent the amount recorded within our consolidated statements of income. Variable lease amounts represent expenses recognized as incurred which are not included in the lease liability. Fixed lease expenses and sublease income are recorded on a straight-line basis over the lease term and therefore are not necessarily representative of cash payments during the same period

[2] Cash flows are presented on a consolidated basis and represent cash payments for fixed and variable lease costs