Loans and Allowance for Credit Losses for Loans - Past Due, Non-Accrual and Current Loans by Loan Portfolio Class (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 183,570
Current Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	170,198
30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,276
90 Days or More Past Due Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,096
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	84,718
Commercial and industrial | Current Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	73,859
Commercial and industrial | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,916
Commercial and industrial | 90 Days or More Past Due Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,943
Commercial Real Estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	98,370
Commercial Real Estate | Current Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	96,217
Commercial Real Estate | 30-89 Days Past Due | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0
Commercial Real Estate | 90 Days or More Past Due Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,153
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	360
Residential mortgage | Current Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0
Residential mortgage | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	360
Residential mortgage | 90 Days or More Past Due Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	122
Home equity | Current Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	122
Home equity | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0
Home equity | 90 Days or More Past Due Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0