Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Operating lease rent expense	$ 11.9	$ 11.3	$ 10.1
Cash paid for operating leases	$ 13.3
Weighted average discount rate of operating leases	3.30%
Average remaining operating lease term	2 years 9 months 18 days
Operating lease liabilities, leases not yet commenced, description	As of December 31, 2021, the present value of the operating lease liabilities that had not yet commenced was $1.9 million.
Operating lease liabilities, leases not yet commenced	$ 1.9
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease expiration year	Dec. 31, 2022
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease expiration year	Dec. 31, 2027