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Loans Receivable And Allowance For Loan Losses: Impaired Financing Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2018 | Sep. 30, 2017
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | $ 4,526 |  | $ 4,526 | $ 3,830 |
With an allowance recorded |  | 670 |  | 670 | 3,162 |
Total: |  | 5,196 |  | 5,196 | 6,992 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 4,792 |  | 4,792 | 4,089 |
With an allowance recorded |  | 670 |  | 670 | 3,221 |
Total: |  | 5,462 |  | 5,462 | 7,310 |
Related Allowance |  | 396 |  | 396 | 476 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 4,168 | [1] | 4,054 | 5,963 | [2]
With an allowance recorded |  | 1,992 | [1] | 2,382 | 5,260 | [2]
Total |  | 6,160 | [1] | 6,436 | 11,223 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 81 | [1] | 126 | 271 | [2]
With an allowance recorded |  | 6 | [1] | 48 | 296 | [2]
Total |  | 87 | [1] | 174 | 567 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 70 | [1] | 106 | 218 | [2]
With an allowance recorded |  | 6 | [1] | 39 | 237 | [2]
Total |  | 76 | [1] | 145 | 455 | [2]
Mortgage loans, one-to-four family |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 1,318 |  | 1,318 | 1,443 |
With an allowance recorded |  | 0 |  | 0 | 0 |
Total: |  | 1,318 |  | 1,318 | 1,443 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 1,464 |  | 1,464 | 1,589 |
With an allowance recorded |  | 0 |  | 0 | 0 |
Total: |  | 1,464 |  | 1,464 | 1,589 |
Related Allowance |  | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 1,371 | [1] | 1,395 | 1,108 | [2]
With an allowance recorded |  | 22 | [1] | 15 | 721 | [2]
Total |  | 1,393 | [1] | 1,410 | 1,829 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 22 | [1] | 42 | 68 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 50 | [2]
Total |  | 22 | [1] | 42 | 118 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 19 | [1] | 36 | 62 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 38 | [2]
Total |  | 19 | [1] | 36 | 100 | [2]
Mortgage loans, commercial |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 2,578 |  | 2,578 | 1,967 |
With an allowance recorded |  | 0 |  | 0 | 1,906 |
Total: |  | 2,578 |  | 2,578 | 3,873 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 2,606 |  | 2,606 | 1,967 |
With an allowance recorded |  | 0 |  | 0 | 1,906 |
Total: |  | 2,606 |  | 2,606 | 3,873 |
Related Allowance |  | 0 |  | 0 | 26 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 2,365 | [1] | 2,232 | 3,901 | [2]
With an allowance recorded |  | 947 | [1] | 1,266 | 3,326 | [2]
Total |  | 3,312 | [1] | 3,498 | 7,227 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 52 | [1] | 75 | 188 | [2]
With an allowance recorded |  | 0 | [1] | 27 | 182 | [2]
Total |  | 52 | [1] | 102 | 370 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 45 | [1] | 62 | 143 | [2]
With an allowance recorded |  | 0 | [1] | 21 | 144 | [2]
Total |  | 45 | [1] | 83 | 287 | [2]
Mortgage loans, construction - custom and owner/builder |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  |  |  |  | 0 |
Total: |  |  |  |  | 0 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  |  |  |  | 0 |
Total: |  |  |  |  | 0 |
Related Allowance |  |  |  |  | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 147 |
Total | [2] |  |  |  | 147 |
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 7 |
Total | [2] |  |  |  | 7 |
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 7 |
Total | [2] |  |  |  | 7 |
Mortgage loans, land |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 445 |  | 445 | 297 |
With an allowance recorded |  | 195 |  | 195 | 822 |
Total: |  | 640 |  | 640 | 1,119 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 537 |  | 537 | 410 |
With an allowance recorded |  | 195 |  | 195 | 881 |
Total: |  | 732 |  | 732 | 1,291 |
Related Allowance |  | 40 |  | 40 | 125 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 245 | [1] | 262 | 512 | [2]
With an allowance recorded |  | 547 | [1] | 639 | 666 | [2]
Total |  | 792 | [1] | 901 | 1,178 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 6 | [1] | 6 | 8 | [2]
With an allowance recorded |  | 0 | [1] | 9 | 35 | [2]
Total |  | 6 | [1] | 15 | 43 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 5 | [1] | 5 | 6 | [2]
With an allowance recorded |  | 0 | [1] | 8 | 29 | [2]
Total |  | 5 | [1] | 13 | 35 | [2]
Consumer loans, home equity and second mortgage |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 185 |  | 185 | 123 |
With an allowance recorded |  | 294 |  | 294 | 434 |
Total: |  | 479 |  | 479 | 557 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 185 |  | 185 | 123 |
With an allowance recorded |  | 294 |  | 294 | 434 |
Total: |  | 479 |  | 479 | 557 |
Related Allowance |  | 293 |  | 293 | 325 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 187 | [1] | 165 | 284 | [2]
With an allowance recorded |  | 295 | [1] | 341 | 530 | [2]
Total |  | 482 | [1] | 506 | 814 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 1 | [1] | 3 | 0 | [2]
With an allowance recorded |  | 6 | [1] | 12 | 29 | [2]
Total |  | 7 | [1] | 15 | 29 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 1 | [1] | 3 | 0 | [2]
With an allowance recorded |  | 6 | [1] | 10 | 26 | [2]
Total |  | 7 | [1] | 13 | 26 | [2]
Consumer loans, other |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With an allowance recorded |  |  |  |  | 0 |
Total: |  |  |  |  | 0 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With an allowance recorded |  |  |  |  | 0 |
Total: |  |  |  |  | 0 |
Related Allowance |  |  |  |  | 0 |
Average Recorded Investment |  |  |  |  |  |
With an allowance recorded | [2] |  |  |  | 17 |
Total | [2] |  |  |  | 17 |
Interest Income Recognized |  |  |  |  |  |
With an allowance recorded | [2] |  |  |  | 0 |
Total | [2] |  |  |  | 0 |
Cash Basis Interest Income Recognized |  |  |  |  |  |
With an allowance recorded | [2] |  |  |  | 0 |
Total | [2] |  |  |  | 0 |
Commercial business loans |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  |  |  |  | 0 |
With an allowance recorded |  | 181 |  | 181 |  |
Total: |  | 181 |  | 181 | 0 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  |  |  |  | 0 |
With an allowance recorded |  | 181 |  | 181 |  |
Total: |  | 181 |  | 181 | 0 |
Related Allowance |  | 63 |  | 63 | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 11 |
With an allowance recorded |  |  |  | 121 |  |
Total |  | 181 | [1] | 121 | 11 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 0 |
With an allowance recorded |  | 0 | [1] | 0 |  |
Total |  | 0 | [1] | 0 | 0 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded | [2] |  |  |  | 0 |
With an allowance recorded |  | 0 | [1] | 0 |  |
Total |  | $ 0 | [1] | $ 0 | $ 0 | [2]
[1] | For the three months ended March 31, 2018
[2] | For the year ended September 30, 2017.

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