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LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES(Financing Receivable, Modified, Past Due) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023
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30-59 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | $ 0 |
60 to 89 Days Past Due [Member] |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
90 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 2,761 |
Financial Asset, Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated |  | $ 2,761
Commercial Business | 30-59 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
Commercial Business | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
Commercial Business | 90 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 121 |
Commercial Business | Financial Asset, Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 121 |
Agricultural Business | 30-59 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
Agricultural Business | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
Agricultural Business | 90 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 1,580 |
Agricultural Business | Financial Asset, Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 1,580 |
One- to Four-Family Residential | 30-59 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
One- to Four-Family Residential | 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 0 |
One- to Four-Family Residential | 90 Days Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | 1,060 |
One- to Four-Family Residential | Financial Asset, Past Due |  |
Financing Receivable, Modified, Past Due [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated | $ 1,060 |

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