Subordinated Debentures - Narrative (Details) $ in Thousands	Mar. 31, 2024 USD ($) note	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Subordinated debentures	$ 332,001	$ 331,842
Subordinated notes
Debt Instrument [Line Items]
Number of subordinated notes | note	3
Subordinated debentures	$ 332,001	$ 331,842
Weighted interest rate (as a percent)	5.30%	5.31%
Increase to carrying value of subordinated debt	$ 159