Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee Lease Description [Line Items]
Operating leases right-of-use assets additions	$ 6.1		$ 6.1
Operating leases lease liabilities additions	$ 6.1		$ 6.1
Weighted average discount rate for operating leases	4.90%		4.90%
Operating lease expense costs	$ 10.8	$ 11.9	$ 21.7	$ 24.0
Cash payments for operating lease liabilities	$ 13.3	$ 14.0	$ 20.9	$ 26.1