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Loans Receivable and Allowance for Loan Losses: Summary of TDR Loans (Details) - USD ($) | Sep. 30, 2023 | Sep. 30, 2022
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Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
TDR loans included in impaired loans | $ 2,495,000 | $ 2,615,000
TDR Loans, commitment to lend additional funds |  | 0
Allowance for loan losses | $ 15,817,000 | $ 13,703,000

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