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Loans and Allowance for Credit Losses - Performance of Loans Modified (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
30-59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | $ 0 | $ 39
60-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 96 | 0
90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 116 | 16
Total Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 212 | 55
Real Estate Loan | 30-59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 28
Real Estate Loan | 60-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
Real Estate Loan | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
Real Estate Loan | Total Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 28
Consumer Loans | 30-59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
Consumer Loans | 60-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 96 | 0
Consumer Loans | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 116 | 16
Consumer Loans | Total Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 212 | 16
Commercial and Industrial Loans | 30-59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 11
Commercial and Industrial Loans | 60-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
Commercial and Industrial Loans | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
Commercial and Industrial Loans | Total Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 11
1-4 Family | Residential Properties | Real Estate Loan | 30-59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 28
1-4 Family | Residential Properties | Real Estate Loan | 60-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
1-4 Family | Residential Properties | Real Estate Loan | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | 0 | 0
1-4 Family | Residential Properties | Real Estate Loan | Total Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable Modifications Performance Recorded Investment | $ 0 | $ 28

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