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Loans, Allowance for Credit Losses, and Asset Quality Information - Schedule of Aging Modifications (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | $ 2,855 | $ 11,640
Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 79
Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 65 | 0
Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Commercial and industrial | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 1,086 | 2,841
Commercial and industrial | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Commercial and industrial | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Commercial and industrial | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Construction, development & other land loans | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 250 | 362
Real estate, commercial | Construction, development & other land loans | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Construction, development & other land loans | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Construction, development & other land loans | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Commercial real estate - owner occupied | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 4,455
Real estate, commercial | Commercial real estate - owner occupied | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 0
Real estate, commercial | Commercial real estate - owner occupied | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 0
Real estate, commercial | Commercial real estate - owner occupied | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 0
Real estate, commercial | Commercial real estate - non owner occupied | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 107 | 206
Real estate, commercial | Commercial real estate - non owner occupied | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Commercial real estate - non owner occupied | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, commercial | Commercial real estate - non owner occupied | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, mortgage | Residential 1-4 family real estate | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 134 | 656
Real estate, mortgage | Residential 1-4 family real estate | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 79
Real estate, mortgage | Residential 1-4 family real estate | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 65 | 0
Real estate, mortgage | Residential 1-4 family real estate | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, mortgage | Home equity loans/lines of credit | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 1,278 | 3,114
Real estate, mortgage | Home equity loans/lines of credit | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, mortgage | Home equity loans/lines of credit | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | 0 | 0
Real estate, mortgage | Home equity loans/lines of credit | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis | $ 0 | 0
Consumer loans | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 6
Consumer loans | Accruing 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 0
Consumer loans | Accruing 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | 0
Consumer loans | Accruing 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized cost basis |  | $ 0

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