Subordinated Debentures - Narrative (Details) $ in Thousands	Sep. 30, 2023 USD ($) note	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Subordinated debentures	$ 331,682	$ 331,204
Increase to carrying value of subordinated debt	$ 478
Subordinated notes
Debt Instrument [Line Items]
Number of notes/securities | note	3
Subordinated debentures	$ 331,682	$ 331,204
Weighted interest rate (as a percent)	5.31%	5.32%