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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Sep. 30, 2018
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | $ 885,881 | $ 737,558
Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 130,413 | 115,941
Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 74,816 | 61,928
Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 417,223 | 345,113
Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 66,622 | 67,024
Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 11,296 | 7,107
Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 27,752 | 23,440
Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 13,595 | 5,983
Mortgage loans, construction - Land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 7,405 | 1,567
Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 22,471 | 25,546
Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 41,609 | 37,341
Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,605 | 3,515
Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 68,074 | 43,053
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 867,027 | 720,600
Pass | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 127,202 | 113,148
Pass | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 74,816 | 61,928
Pass | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 406,675 | 334,908
Pass | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 66,391 | 66,720
Pass | Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 11,296 | 7,107
Pass | Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 27,752 | 23,440
Pass | Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 13,595 | 5,983
Pass | Mortgage loans, construction - Land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 7,178 | 1,567
Pass | Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 19,806 | 22,810
Pass | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 40,994 | 36,697
Pass | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,556 | 3,480
Pass | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 66,766 | 42,812
Watch |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 10,570 | 10,653
Watch | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 699 | 882
Watch | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 8,285 | 8,375
Watch | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 231 | 304
Watch | Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Mortgage loans, construction - Land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 968 | 988
Watch | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 79 | 82
Watch | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 34 | 0
Watch | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 274 | 22
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,630 | 3,123
Special Mention | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 567 | 581
Special Mention | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 696 | 988
Special Mention | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, construction - Land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,236 | 1,505
Special Mention | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Special Mention | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 131 | 49
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 5,654 | 3,182
Substandard | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,945 | 1,330
Substandard | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Substandard | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,567 | 842
Substandard | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Substandard | Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Substandard | Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Substandard | Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Substandard | Mortgage loans, construction - Land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 227 | 0
Substandard | Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 461 | 243
Substandard | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 536 | 562
Substandard | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 15 | 35
Substandard | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | $ 903 | $ 170

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