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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, 2019 | Mar. 31, 2019 | Sep. 30, 2018
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | $ 4,955 |  | $ 4,955 | $ 3,949 |
With an allowance recorded |  | 718 |  | 718 | 323 |
Total: |  | 5,673 |  | 5,673 | 4,272 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 5,117 |  | 5,117 | 4,200 |
With an allowance recorded |  | 718 |  | 718 | 323 |
Total: |  | 5,835 |  | 5,835 | 4,523 |
Related Allowance |  | 231 |  | 231 | 97 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 4,454 | [1] | 4,285 | 4,304 | [2]
With an allowance recorded |  | 651 | [1] | 541 | 1,603 | [2]
Total |  | 5,105 | [1] | 4,826 | 5,907 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 59 | [1] | 117 | 215 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 53 | [2]
Total |  | 59 | [1] | 117 | 268 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 50 | [1] | 96 | 175 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 42 | [2]
Total |  | 50 | [1] | 96 | 217 | [2]
Mortgage loans, one-to-four family |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 1,069 |  | 1,069 | 1,054 |
With an allowance recorded |  |  |  |  | 0 |
Total: |  | 1,069 |  | 1,069 | 1,054 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 1,150 |  | 1,150 | 1,200 |
With an allowance recorded |  |  |  |  | 0 |
Total: |  | 1,150 |  | 1,150 | 1,200 |
Related Allowance |  | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 1,042 | [1] | 1,046 | 1,422 | [2]
With an allowance recorded | [2] |  |  |  | 9 |
Total |  | 1,042 | [1] | 1,046 | 1,431 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 17 | [1] | 35 | 80 | [2]
With an allowance recorded | [2] |  |  |  | 0 |
Total |  | 17 | [1] | 35 | 80 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 16 | [1] | 32 | 69 | [2]
With an allowance recorded | [2] |  |  |  | 0 |
Total |  | 16 | [1] | 32 | 69 | [2]
Mortgage loans, commercial |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 3,271 |  | 3,271 | 2,446 |
With an allowance recorded |  |  |  |  | 0 |
Total: |  | 3,271 |  | 3,271 | 2,446 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 3,271 |  | 3,271 | 2,446 |
With an allowance recorded |  |  |  |  | 0 |
Total: |  | 3,271 |  | 3,271 | 2,446 |
Related Allowance |  | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 2,854 | [1] | 2,718 | 2,389 | [2]
With an allowance recorded | [2] |  |  |  | 760 |
Total |  | 2,854 | [1] | 2,718 | 3,149 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 40 | [1] | 80 | 121 | [2]
With an allowance recorded | [2] |  |  |  | 28 |
Total |  | 40 | [1] | 80 | 149 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 32 | [1] | 62 | 93 | [2]
With an allowance recorded | [2] |  |  |  | 21 |
Total |  | 32 | [1] | 62 | 114 | [2]
Mortgage loans, land |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 68 |  | 68 | 90 |
With an allowance recorded |  | 393 |  | 393 | 153 |
Total: |  | 461 |  | 461 | 243 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 141 |  | 141 | 195 |
With an allowance recorded |  | 393 |  | 393 | 153 |
Total: |  | 534 |  | 534 | 348 |
Related Allowance |  | 77 |  | 77 | 34 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 34 | [1] | 53 | 283 | [2]
With an allowance recorded |  | 395 | [1] | 263 | 383 | [2]
Total |  | 429 | [1] | 316 | 666 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 0 | [1] | 0 | 11 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 9 | [2]
Total |  | 0 | [1] | 0 | 20 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 0 | [1] | 0 | 10 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 8 | [2]
Total |  | 0 | [1] | 0 | 18 | [2]
Consumer loans, home equity and second mortgage |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 342 |  | 342 | 359 |
With an allowance recorded |  | 0 |  | 0 | 0 |
Total: |  | 342 |  | 342 | 359 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 342 |  | 342 | 359 |
With an allowance recorded |  | 0 |  | 0 | 0 |
Total: |  | 342 |  | 342 | 359 |
Related Allowance |  | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 364 | [1] | 362 | 210 | [2]
With an allowance recorded |  | 0 | [1] | 51 | 310 | [2]
Total |  | 364 | [1] | 413 | 520 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 0 | [1] | 0 | 3 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 16 | [2]
Total |  | 0 | [1] | 0 | 19 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 0 | [1] | 0 | 3 | [2]
With an allowance recorded |  | 0 | [1] | 0 | 13 | [2]
Total |  | 0 | [1] | 0 | 16 | [2]
Consumer loans, other |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With an allowance recorded |  | 15 |  | 15 | 170 |
Total: |  | 15 |  | 15 |  |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With an allowance recorded |  | 15 |  | 15 | 170 |
Total: |  | 15 |  | 15 |  |
Related Allowance |  | 9 |  | 9 | 63 |
Average Recorded Investment |  |  |  |  |  |
With an allowance recorded |  | 8 | [1] | 5 | 141 | [2]
Total |  | 8 | [1] | 5 |  |
Interest Income Recognized |  |  |  |  |  |
With an allowance recorded |  | 0 | [1] | 0 | 0 | [2]
Total |  | 0 | [1] | 0 |  |
Cash Basis Interest Income Recognized |  |  |  |  |  |
With an allowance recorded |  | 0 | [1] | 0 | 0 | [2]
Total |  | 0 | [1] | 0 |  |
Commercial business loans |  |  |  |  |  |
Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 205 |  | 205 |  |
With an allowance recorded |  | 310 |  | 310 |  |
Total: |  | 515 |  | 515 | 170 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |  |
With no related allowance recorded |  | 213 |  | 213 |  |
With an allowance recorded |  | 310 |  | 310 |  |
Total: |  | 523 |  | 523 | 170 |
Related Allowance |  | 145 |  | 145 | 63 |
Average Recorded Investment |  |  |  |  |  |
With no related allowance recorded |  | 160 | [1] | 106 |  |
With an allowance recorded |  | 248 |  | 222 |  |
Total |  | 408 | [1] | 328 | 141 | [2]
Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 2 | [1] | 2 |  |
With an allowance recorded |  | 0 | [1] | 0 |  |
Total |  | 2 | [1] | 2 | 0 | [2]
Cash Basis Interest Income Recognized |  |  |  |  |  |
With no related allowance recorded |  | 2 | [1] | 2 |  |
With an allowance recorded |  | 0 | [1] | 0 |  |
Total |  | $ 2 | [1] | $ 2 | $ 0 | [2]
[1] | For the three months ended March 31, 2019
[2] | For the year ended September 30, 2018.

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