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Loans Receivable And Allowance For Loan Losses: Impaired Financing Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018
Recorded Investment |  |  |  |
With no related allowance recorded |  | $ 3,950 | $ 3,949 |
With an allowance recorded |  | 581 | 323 |
Total: |  | 4,531 | 4,272 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 4,175 | 4,200 |
With an allowance recorded |  | 581 | 323 |
Total: |  | 4,756 | 4,523 |
Related Allowance |  | 137 | 97 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 3,950 | 4,304 | [1]
With an allowance recorded |  | 453 | 1,603 | [1]
Total |  | 4,403 | 5,907 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 58 | 215 | [1]
With an allowance recorded |  | 0 | 53 | [1]
Total |  | 58 | 268 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 47 | 175 | [1]
With an allowance recorded |  | 0 | 42 | [1]
Total |  | 47 | 217 | [1]
Mortgage loans, one-to-four family |  |  |  |
Recorded Investment |  |  |  |
With no related allowance recorded |  | 1,014 | 1,054 |
With an allowance recorded |  |  | 0 |
Total: |  | 1,014 | 1,054 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 1,161 | 1,200 |
With an allowance recorded |  |  | 0 |
Total: |  | 1,161 | 1,200 |
Related Allowance |  | 0 | 0 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 1,034 | 1,422 | [1]
With an allowance recorded | [1] |  | 9 |
Total |  | 1,034 | 1,431 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 18 | 80 | [1]
With an allowance recorded | [1] |  | 0 |
Total |  | 18 | 80 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 16 | 69 | [1]
With an allowance recorded | [1] |  | 0 |
Total |  | 16 | 69 | [1]
Mortgage loans, commercial |  |  |  |
Recorded Investment |  |  |  |
With no related allowance recorded |  | 2,436 | 2,446 |
With an allowance recorded |  |  | 0 |
Total: |  | 2,436 | 2,446 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 2,436 | 2,446 |
With an allowance recorded |  |  | 0 |
Total: |  | 2,436 | 2,446 |
Related Allowance |  | 0 | 0 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 2,441 | 2,389 | [1]
With an allowance recorded | [1] |  | 760 |
Total |  | 2,441 | 3,149 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 40 | 121 | [1]
With an allowance recorded | [1] |  | 28 |
Total |  | 40 | 149 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 31 | 93 | [1]
With an allowance recorded | [1] |  | 21 |
Total |  | 31 | 114 | [1]
Mortgage loans, land |  |  |  |
Recorded Investment |  |  |  |
With no related allowance recorded |  | 0 | 90 |
With an allowance recorded |  | 396 | 153 |
Total: |  | 396 | 243 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 78 | 195 |
With an allowance recorded |  | 396 | 153 |
Total: |  | 474 | 348 |
Related Allowance |  | 79 | 34 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 45 | 283 | [1]
With an allowance recorded |  | 198 | 383 | [1]
Total |  | 243 | 666 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 | 11 | [1]
With an allowance recorded |  | 0 | 9 | [1]
Total |  | 0 | 20 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 | 10 | [1]
With an allowance recorded |  | 0 | 8 | [1]
Total |  | 0 | 18 | [1]
Consumer loans, home equity and second mortgage |  |  |  |
Recorded Investment |  |  |  |
With no related allowance recorded |  | 386 | 359 |
With an allowance recorded |  | 0 | 0 |
Total: |  | 386 | 359 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 386 | 359 |
With an allowance recorded |  | 0 | 0 |
Total: |  | 386 | 359 |
Related Allowance |  | 0 | 0 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 373 | 210 | [1]
With an allowance recorded |  | 77 | 310 | [1]
Total |  | 450 | 520 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 | 3 | [1]
With an allowance recorded |  | 0 | 16 | [1]
Total |  | 0 | 19 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 | 3 | [1]
With an allowance recorded |  | 0 | 13 | [1]
Total |  | 0 | 16 | [1]
Consumer loans, other |  |  |  |
Recorded Investment |  |  |  |
With an allowance recorded |  |  | 170 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With an allowance recorded |  |  | 170 |
Related Allowance |  |  | 63 |
Average Recorded Investment |  |  |  |
With an allowance recorded | [1] |  | 141 |
Interest Income Recognized |  |  |  |
With an allowance recorded | [1] |  | 0 |
Cash Basis Interest Income Recognized |  |  |  |
With an allowance recorded | [1] |  | 0 |
Commercial business loans |  |  |  |
Recorded Investment |  |  |  |
With no related allowance recorded |  | 114 |  |
With an allowance recorded |  | 185 |  |
Total: |  | 299 | 170 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |
With no related allowance recorded |  | 114 |  |
With an allowance recorded |  | 185 |  |
Total: |  | 299 | 170 |
Related Allowance |  | 58 | 63 |
Average Recorded Investment |  |  |  |
With no related allowance recorded |  | 57 |  |
With an allowance recorded |  | 178 |  |
Total |  | 235 | 141 | [1]
Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 |  |
With an allowance recorded |  | 0 |  |
Total |  | 0 | 0 | [1]
Cash Basis Interest Income Recognized |  |  |  |
With no related allowance recorded |  | 0 |  |
With an allowance recorded |  | 0 |  |
Total |  | $ 0 | $ 0 | [1]
[1] | For the year ended September 30, 2018.

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