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Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | $ 717,337 | $ 702,383
Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 116,976 | 118,147
Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 61,366 | 58,607
Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 333,085 | 328,927
Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 71,548 | 63,538
Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,723 | 4,639
Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 14,390 | 11,016
Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 9,109 | 6,912
Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 21,122 | 23,910
Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 38,975 | 38,420
Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,050 | 3,823
Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 43,993 | 44,444
Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 698,683 | 682,391
Pass | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 113,235 | 115,481
Pass | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 61,366 | 56,857
Pass | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 322,737 | 318,717
Pass | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 70,989 | 63,210
Pass | Mortgage loans, construction - speculative one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,723 | 4,639
Pass | Mortgage loans, construction – commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 14,390 | 11,016
Pass | Mortgage loans, construction - Multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 9,109 | 6,912
Pass | Mortgage loans, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 17,929 | 20,528
Pass | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 38,463 | 37,828
Pass | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,014 | 3,787
Pass | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 43,728 | 43,416
Watch |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 8,681 | 8,956
Watch | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 902 | 422
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 | 6,028 | 6,059
Watch | Mortgage loans, construction - custom and owner/builder |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 559 | 328
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, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,014 | 1,022
Watch | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 149 | 152
Watch | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 0
Watch | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 29 | 973
Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 5,956 | 7,783
Special Mention | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 595 | 644
Special Mention | Mortgage loans, multi-family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 0 | 1,750
Special Mention | Mortgage loans, commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 3,522 | 3,540
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, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 1,784 | 1,794
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 | 55 | 55
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 4,017 | 3,253
Substandard | Mortgage loans, one-to-four family |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 2,244 | 1,600
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 | 798 | 611
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, land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 395 | 566
Substandard | Consumer loans, home equity and second mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 363 | 440
Substandard | Consumer loans, other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | 36 | 36
Substandard | Commercial business loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans receivable | $ 181 | $ 0

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