Subordinated Debentures and Trust Preferred Securities - Narrative (Details) - USD ($)	Jun. 04, 2025	Mar. 01, 2022	Jun. 04, 2020	Jun. 30, 2024	Dec. 31, 2023
Subordinated Debt | The Notes
Debt Instrument [Line Items]
Face amount of debt issued and sold			$ 60,000,000
Issuance costs			$ 1,400,000
Unamortized debt issuance costs				$ 856,000	$ 928,000
Period to defer payment of interest (not exceeding)			5 years
Remaining purchase discount				3,400,000
Subordinated Debt | The Notes | Forecast
Debt Instrument [Line Items]
Multiples allowed to be redeemed	$ 1,000
Redemption price (as a percent)	100.00%
Subordinated Debt | The Notes | From and including June 4, 2020, to but excluding June 15, 2025 or early redemption date
Debt Instrument [Line Items]
Fixed interest rate			6.00%
Subordinated Debt | The Notes | From and including June 15, 2025, to but excluding the maturity date or early redemption date
Debt Instrument [Line Items]
Basis spread on variable rate			5.86%
Junior Subordinated Debt | 5.50% Fixed to Floating Rate Subordinated Notes Due 2030
Debt Instrument [Line Items]
Fixed interest rate		5.50%
Basis spread on variable rate		5.27%
Junior Subordinated Debt | 5.50% Fixed to Floating Rate Subordinated Notes Due 2030 | First Trust Corporation ("FTC") Merger Agreement
Debt Instrument [Line Items]
Aggregate obligation assumed in conjunction with FTC merger		$ 21,000,000
Remaining purchase premium				$ 300,000