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Loans Receivable and Allowance for Loan Losses: Schedule of Loans receivable and Loans held for sale (Details) - USD ($) | Sep. 30, 2024 | Sep. 30, 2023
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans receivable | $ 1,514,304,000 | $ 1,426,558,000
Undisbursed portion of construction loans in process | 69,878,000 | 103,194,000
Deferred loan origination fees | 5,425,000 | 5,242,000
Allowance for credit losses | 17,478,000 | 15,817,000
Less: Loans in process, Deferred fees and Allowance for loan losses | 92,781,000 | 124,253,000
Total loans receivable, net | 1,421,523,000 | 1,302,305,000
Unamortized discounts, loans receivable | 155,000 | 192,000
Total mortgage loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 1,324,259,000 | 1,249,237,000
Mortgage loans, one-to-four family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 299,123,000 | 253,227,000
Mortgage loans, multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 177,350,000 | 127,176,000
Mortgage loans, commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 599,219,000 | 568,265,000
Mortgage loans, construction - custom and owner/builder |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 132,101,000 | 129,699,000
Mortgage loans, construction - speculative one-to-four family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 11,495,000 | 17,099,000
Mortgage loans, construction - commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 29,463,000 | 51,064,000
Mortgage loans, construction - multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 28,401,000 | 57,140,000
Mortgage loans - construction - land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 17,741,000 | 18,841,000
Mortgage loans, land |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans | 29,366,000 | 26,726,000
Total consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 51,042,000 | 41,053,000
Consumer loans, home equity and second mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 47,913,000 | 38,281,000
Consumer loans, other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Consumer loans | 3,129,000 | 2,772,000
Commercial business loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
SBA Paycheck Protection Program ("PPP") | 138,743,000 | 135,802,000
SBA PPP |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
SBA Paycheck Protection Program ("PPP") | 260,000 | 466,000
Commercial And PPP Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
SBA Paycheck Protection Program ("PPP") | $ 139,003,000 | $ 136,268,000

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