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Loans Receivable And Allowance For Loan Losses: Schedule of Loans receivable and Loans held for sale (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 1,506,665	$ 1,426,558
Undisbursed portion of construction loans in process ("LIP")	87,196	103,194
Deferred loan origination fees, net	5,404	5,242
Allowance for loan losses	17,046	15,817
Less: Loans in process, Deferred fees and Allowance for loan losses	109,646	124,253
Loans receivable, net	$ 1,397,019	$ 1,302,305	[1]
Ratio of loan category to total loans receivable (percent)	100.00%	100.00%
Mortgage loans excluded	$ 1,800	$ 400
Total mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 1,323,338	$ 1,249,237
Ratio of loan category to total loans receivable (percent)	87.90%	87.60%
One-to four-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 288,611	$ 253,227
Ratio of loan category to total loans receivable (percent)	19.20%	17.80%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 177,950	$ 127,176
Ratio of loan category to total loans receivable (percent)	11.80%	8.90%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 597,865	$ 568,265
Ratio of loan category to total loans receivable (percent)	39.70%	39.80%
Construction-custom & owner/builder
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 128,222	$ 129,699
Ratio of loan category to total loans receivable (percent)	8.50%	9.10%
Construction-speculative one-to four-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 11,441	$ 17,099
Ratio of loan category to total loans receivable (percent)	0.80%	1.20%
Construction-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 32,130	$ 51,064
Ratio of loan category to total loans receivable (percent)	2.10%	3.60%
Construction-multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 35,631	$ 57,140
Ratio of loan category to total loans receivable (percent)	2.40%	4.00%
Construction-land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 19,104	$ 18,841
Ratio of loan category to total loans receivable (percent)	1.30%	1.30%
Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 32,384	$ 26,726
Ratio of loan category to total loans receivable (percent)	2.10%	1.90%
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 46,800	$ 41,053
Ratio of loan category to total loans receivable (percent)	3.10%	2.90%
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 43,679	$ 38,281
Ratio of loan category to total loans receivable (percent)	2.90%	2.70%
Consumer loans, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 3,121	$ 2,772
Ratio of loan category to total loans receivable (percent)	0.20%	0.20%
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 136,213	$ 135,802
Ratio of loan category to total loans receivable (percent)	9.00%	9.50%
SBA PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 314	$ 466
Ratio of loan category to total loans receivable (percent)	0.00%	0.00%
Total Commercial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 136,527	$ 136,268
Ratio of loan category to total loans receivable (percent)	9.00%	9.50%
[1] Derived from audited consolidated financial statements.

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