Leases - Summary of Additional Lease Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 10,577	$ 10,953
Operating ROU assets obtained in exchange for lease obligations	$ 12,200	$ 18,497
Weighted-average remaining lease term - operating leases (years)	6 years 4 months 24 days	6 years 4 months 24 days
Weighted-average discount rate - operating leases	4.60%	5.10%