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Loans and Allowance for Loan Losses - Schedule of Current, Accruing Past Due, and Non-Accrual Loans on an Amortized Cost Basis by Loan Portfolio Class (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | $ 108,296 | $ 128,397
Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 73,623 | 109,918
Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 1,111 | 1,013
Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 33,562 | 17,466
Total commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 30,594 | 116,588
Total commercial and industrial | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 28,984 | 102,495
Total commercial and industrial | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 1,005 | 829
Total commercial and industrial | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial and industrial | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 605 | 13,264
Total commercial and industrial | Commercial, financial and agricultural |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 27,599 | 42,801
Total commercial and industrial | Commercial, financial and agricultural | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 26,239 | 29,386
Total commercial and industrial | Commercial, financial and agricultural | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 1,005 | 829
Total commercial and industrial | Commercial, financial and agricultural | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial and industrial | Commercial, financial and agricultural | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 355 | 12,586
Total commercial and industrial | Owner-occupied |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 2,995 | 73,787
Total commercial and industrial | Owner-occupied | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 2,745 | 73,109
Total commercial and industrial | Owner-occupied | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial and industrial | Owner-occupied | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial and industrial | Owner-occupied | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 250 | 678
Total commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 76,497 | 6,798
Total commercial real estate | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 44,100 | 4,886
Total commercial real estate | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 32,397 | 1,912
Total commercial real estate | Investment properties |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 76,497 | 2,848
Total commercial real estate | Investment properties | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 44,100 | 2,533
Total commercial real estate | Investment properties | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Investment properties | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Investment properties | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 32,397 | 315
Total commercial real estate | 1-4 family properties |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 2,804
Total commercial real estate | 1-4 family properties | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 1,207
Total commercial real estate | 1-4 family properties | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | 1-4 family properties | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | 1-4 family properties | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 1,597
Total commercial real estate | Land and development |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 1,146
Total commercial real estate | Land and development | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 1,146
Total commercial real estate | Land and development | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Land and development | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total commercial real estate | Land and development | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 1,205 | 5,011
Total consumer | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 539 | 2,537
Total consumer | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 106 | 184
Total consumer | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 560 | 2,290
Total consumer | Consumer mortgages |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 331 | 2,578
Total consumer | Consumer mortgages | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 1,184
Total consumer | Consumer mortgages | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Consumer mortgages | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Consumer mortgages | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 331 | 1,394
Total consumer | Home equity |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 714
Total consumer | Home equity | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 714
Total consumer | Home equity | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Home equity | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Home equity | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Credit cards |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Credit cards | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Credit cards | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Credit cards | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Credit cards | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Other consumer loans |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 874 | 1,719
Total consumer | Other consumer loans | Current |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 539 | 639
Total consumer | Other consumer loans | Accruing 30-89 Days Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 106 | 184
Total consumer | Other consumer loans | Accruing 90 Days or Greater Past Due |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | 0 | 0
Total consumer | Other consumer loans | Non-accrual |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of loans, aging analysis | $ 229 | $ 896

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