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ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Performance of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | $ 166,754 | $ 78,186
30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 908 | 9,440
90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 382 | 207
Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 120,852 | 55,525
Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 44,612 | 13,014
Commercial | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 107,531 | 48,070
Commercial | Commercial and industrial | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 428
Commercial | Commercial and industrial | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Commercial and industrial | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 63,410 | 36,299
Commercial | Commercial and industrial | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 44,121 | 11,343
Commercial | Commercial mortgages |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 30,001 | 9,427
Commercial | Commercial mortgages | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Commercial mortgages | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Commercial mortgages | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 30,001 | 9,427
Commercial | Commercial mortgages | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Construction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 21,294 | 9,194
Commercial | Construction | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 8,285
Commercial | Construction | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Construction | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 21,294 | 909
Commercial | Construction | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Commercial | Owner-occupied commercial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total |  | 1,271
Commercial | Owner-occupied commercial | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total |  | 0
Commercial | Owner-occupied commercial | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total |  | 0
Commercial | Owner-occupied commercial | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total |  | 0
Commercial | Owner-occupied commercial | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total |  | 1,271
Residential |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 309 | 613
Residential | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Residential | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 0
Residential | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 0 | 613
Residential | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 309 | 0
Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 7,619 | 9,611
Consumer | 30-89 Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 908 | 727
Consumer | 90+ Days Past Due and Still Accruing |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 382 | 207
Consumer | Accruing Current Balances |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | 6,147 | 8,277
Consumer | Nonaccrual Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total | $ 182 | $ 400

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