Loans Receivable And Allowance For Loan Losses: Schedule 1 of Troubled debt restructured loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	$ 2,600	$ 2,615
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	2,550	2,472
Non- Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	50	143
Mortgage loans, commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	2,312	2,330
Mortgage loans, commercial | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	2,312	2,330
Mortgage loans, commercial | Non- Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	0	0
Mortgage loans, land
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	97	88
Mortgage loans, land | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	97	0
Mortgage loans, land | Non- Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	0	88
Consumer loans, home equity and second mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	191	197
Consumer loans, home equity and second mortgage | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	141	142
Consumer loans, home equity and second mortgage | Non- Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
End of Period Balance	$ 50	$ 55