Commitments, Contingencies, and Concentrations of Credit Risk - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Fixed-rate loan commitments	90 days
Unfunded capital commitments related to investment funds	$ 2.1
Premises and Equipment
Other Commitments [Line Items]
Operating lease expense	$ 5.7	$ 6.3	$ 7.2
Minimum
Other Commitments [Line Items]
Interest rates	5.50%
Maximum
Other Commitments [Line Items]
Interest rates	10.50%