Loans and Allowance for Credit Losses on Loans - Schedule of Amortized Cost Basis of Collateral-Dependent Loans by Loan Portfolio Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Commercial and industrial loans	$ 4,113	$ 5,574
Construction & Secured by Farmland
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans		95
Residential First Lien - Investor
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	1,063	1,086
Residential First Lien - Owner Occupied
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	191	194
Residential Junior Liens
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	9	8
Commercial - Owner Occupied
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans		14
Commercial - Non-Owner Occupied & Multifamily
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	2,336	3,625
Marine loans
Financing Receivable, Past Due [Line Items]
Commercial and industrial loans	514	552
Real Estate Collateral [Member]
Financing Receivable, Past Due [Line Items]
Commercial and industrial loans	3,599	5,022
Real Estate Collateral [Member] | Construction & Secured by Farmland
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans		95
Real Estate Collateral [Member] | Residential First Lien - Investor
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	1,063	1,086
Real Estate Collateral [Member] | Residential First Lien - Owner Occupied
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	191	194
Real Estate Collateral [Member] | Residential Junior Liens
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	9	8
Real Estate Collateral [Member] | Commercial - Owner Occupied
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans		14
Real Estate Collateral [Member] | Commercial - Non-Owner Occupied & Multifamily
Financing Receivable, Past Due [Line Items]
Mortgage real estate loans	2,336	3,625
Other Collateral [Member]
Financing Receivable, Past Due [Line Items]
Commercial and industrial loans	514	552
Other Collateral [Member] | Marine loans
Financing Receivable, Past Due [Line Items]
Commercial and industrial loans	$ 514	$ 552