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Loans Receivable and Allowance for Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | $ 899,150 | $ 737,558
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 877,552 | 720,600
Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 13,731 | 10,653
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 2,547 | 3,123
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 5,320 | 3,182
Mortgage loans, one-to-four family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 132,661 | 115,941
Mortgage loans, one-to-four family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 129,748 | 113,148
Mortgage loans, one-to-four family | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 296 | 882
Mortgage loans, one-to-four family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 562 | 581
Mortgage loans, one-to-four family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 2,055 | 1,330
Mortgage loans, multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 76,036 | 61,928
Mortgage loans, multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 76,036 | 61,928
Mortgage loans, multi-family | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, multi-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 419,117 | 345,113
Mortgage loans, commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 405,165 | 334,908
Mortgage loans, commercial | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 11,944 | 8,375
Mortgage loans, commercial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 683 | 988
Mortgage loans, commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,325 | 842
Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 75,411 | 67,024
Mortgage loans, construction - custom and owner/builder | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 75,178 | 66,720
Mortgage loans, construction - custom and owner/builder | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 233 | 304
Mortgage loans, construction - custom and owner/builder | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - custom and owner/builder | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 10,779 | 7,107
Mortgage loans, construction - speculative one-to-four family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 10,779 | 7,107
Mortgage loans, construction - speculative one-to-four family | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - speculative one-to-four family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - speculative one-to-four family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 24,051 | 23,440
Mortgage loans, construction - commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 24,051 | 23,440
Mortgage loans, construction - commercial | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - commercial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 19,256 | 5,983
Mortgage loans, construction - multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 19,256 | 5,983
Mortgage loans, construction - multi-family | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - multi-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans, construction - multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans - construction - land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,803 | 1,567
Mortgage loans - construction - land development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,659 | 1,567
Mortgage loans - construction - land development | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans - construction - land development | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Mortgage loans - construction - land development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 144 | 0
Mortgage loans, land |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 30,770 | 25,546
Mortgage loans, land | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 28,390 | 22,810
Mortgage loans, land | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 952 | 988
Mortgage loans, land | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,217 | 1,505
Mortgage loans, land | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 211 | 243
Consumer loans, home equity and second mortgage |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 40,190 | 37,341
Consumer loans, home equity and second mortgage | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 39,364 | 36,697
Consumer loans, home equity and second mortgage | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 41 | 82
Consumer loans, home equity and second mortgage | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Consumer loans, home equity and second mortgage | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 785 | 562
Consumer loans, other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 4,312 | 3,515
Consumer loans, other | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 4,257 | 3,480
Consumer loans, other | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 33 | 0
Consumer loans, other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Consumer loans, other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 22 | 35
Commercial business loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 64,764 | 43,053
Commercial business loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 63,669 | 42,812
Commercial business loans | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 232 | 22
Commercial business loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 85 | 49
Commercial business loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | $ 778 | $ 170

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