Leases - Additional Information (Details) $ in Millions			1 Months Ended		12 Months Ended
	Oct. 07, 2020 ft²	Jan. 20, 2020 ft²	Sep. 30, 2021 ft²	Mar. 31, 2021 ft²	Dec. 31, 2022 USD ($) lease	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 01, 2022 USD ($)
Lessee Lease Description [Line Items]
Number of significant operating leases | lease					2
Area of real estate property | ft²	180,000	231,000
Lease, commencement date		Jan. 20, 2020
Lease agreement option to extend renewal term		10 years
Lease, expiration year		2035
Payments for operating leases					$ 33.2	$ 16.8	$ 16.3
Lessee operating lease term of option to extend	5 years
Weighted average incremental borrowing rate					5.25%	5.25%
Weighted average remaining lease term					8 years 10 months 24 days	11 years 8 months 12 days
Operating lease expense					$ 16.6	$ 17.1	$ 17.3
900 Winter Street Lease
Lessee Lease Description [Line Items]
Operating lease liability remeasurement amount								$ 12.8
Operating lease right-of-use asset remeasurement amount								$ 12.8
Payments for operating leases					15.3
Increase in operating lease right of use asset					12.8
Decrease in operating lease liability					$ 2.5
Base Premises
Lessee Lease Description [Line Items]
Area of real estate property | ft²				163,000
Lease period				5 years
Lease agreement commencement period				2021-03
Additional Premises
Lessee Lease Description [Line Items]
Area of real estate property | ft²			17,000
Lease, expiration year			2026
Lease agreement commencement period			2021-09