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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, 2020 | Mar. 31, 2020 | Sep. 30, 2019
Recorded Investment |  |  |  |  |
With no related allowance recorded | $ 5,073 |  | $ 5,073 | $ 5,237 |
With an allowance recorded | 1,020 |  | 1,020 | 700 |
Total: | 6,093 |  | 6,093 | 5,937 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 5,288 |  | 5,288 | 5,446 |
With an allowance recorded | 1,020 |  | 1,020 | 700 |
Total: | 6,308 |  | 6,308 | 6,146 |
Related Allowance | 89 |  | 89 | 172 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 5,235 | [1] | 5,235 | 4,731 |
With an allowance recorded | 796 | [1] | 764 | 606 |
Total | 6,031 | [1] | 5,999 | 5,337 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 72 | [1] | 130 | 331 | [1]
With an allowance recorded | 0 | [1] | 0 | 30 |
Total | 72 | [1] | 130 | 361 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 60 | [1] | 96 | 287 |
With an allowance recorded | 0 | [1] | 0 | 30 |
Total | 60 | [1] | 96 | 317 |
Mortgage loans, one-to-four family |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 941 |  | 941 | 1,192 |
With an allowance recorded | 485 |  | 485 |  |
Total: | 1,426 |  | 1,426 | 1,192 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 984 |  | 984 | 1,236 |
With an allowance recorded | 485 |  | 485 |  |
Total: | 1,469 |  | 1,469 | 1,236 |
Related Allowance | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 1,186 | [1] | 1,188 | 1,110 |
With an allowance recorded | 243 | [1] | 162 |  |
Total | 1,429 | [1] | 1,350 | 1,110 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 20 | [1] | 25 | 71 | [1]
With an allowance recorded | 0 | [1] | 0 |  |
Total | 20 | [1] | 25 | 71 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 18 | [1] | 23 | 62 |
With an allowance recorded | 0 | [1] | 0 |  |
Total | 18 | [1] | 23 | 62 |
Mortgage loans, commercial |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 3,339 |  | 3,339 | 3,190 |
Total: | 3,339 |  | 3,339 | 3,190 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 3,339 |  | 3,339 | 3,190 |
Total: | 3,339 |  | 3,339 | 3,190 |
Related Allowance | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 3,240 | [1] | 3,223 | 2,920 |
Total | 3,240 | [1] | 3,223 | 2,920 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 52 | [1] | 105 | 227 | [1]
Total | 52 | [1] | 105 | 227 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 42 | [1] | 73 | 192 |
Total | 42 | [1] | 73 | 192 |
Mortgage loans, land |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 57 |  | 57 | 63 |
With an allowance recorded | 136 |  | 136 | 141 |
Total: | 193 |  | 193 | 204 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 111 |  | 111 | 126 |
With an allowance recorded | 136 |  | 136 | 141 |
Total: | 247 |  | 247 | 267 |
Related Allowance | 25 |  | 25 | 27 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 58 | [1] | 60 | 100 |
With an allowance recorded | 138 | [1] | 139 | 246 |
Total | 196 | [1] | 199 | 346 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 3 | [1]
With an allowance recorded | 0 | [1] | 0 | 0 |
Total | 0 | [1] | 0 | 3 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 3 |
With an allowance recorded | 0 | [1] | 0 | 0 |
Total | 0 | [1] | 0 | 3 |
Consumer loans, home equity and second mortgage |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 581 |  | 581 | 603 |
Total: | 581 |  | 581 | 603 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 581 |  | 581 | 603 |
Total: | 581 |  | 581 | 603 |
Related Allowance | 0 |  | 0 | 0 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 581 | [1] | 588 | 459 |
Total | 581 | [1] | 588 | 459 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 0 | [1]
Total | 0 | [1] | 0 | 0 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 0 |
Total | 0 | [1] | 0 | 0 |
Consumer loans, other |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 11 |  | 11 |  |
With an allowance recorded | 0 |  | 0 | 23 |
Total: | 11 |  | 11 | 23 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 11 |  | 11 |  |
With an allowance recorded | 0 |  | 0 | 23 |
Total: | 11 |  | 11 | 23 |
Related Allowance | 0 |  | 0 | 17 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 6 | [1] | 4 |  |
With an allowance recorded | 6 | [1] | 12 | 10 |
Total | 12 | [1] | 16 | 10 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 |  |
With an allowance recorded | 0 | [1] | 0 | 0 |
Total | 0 | [1] | 0 | 0 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 |  |
With an allowance recorded | 0 | [1] | 0 |  |
Total | 0 | [1] | 0 | 0 |
Commercial business loans |  |  |  |  |
Recorded Investment |  |  |  |  |
With no related allowance recorded | 144 |  | 144 | 189 |
With an allowance recorded | 399 |  | 399 | 536 |
Total: | 543 |  | 543 | 725 |
Unpaid Principal Balance (Loan Balance Plus Charge Off) |  |  |  |  |
With no related allowance recorded | 262 |  | 262 | 291 |
With an allowance recorded | 399 |  | 399 | 536 |
Total: | 661 |  | 661 | 827 |
Related Allowance | 64 |  | 64 | 128 |
Average Recorded Investment |  |  |  |  |
With no related allowance recorded | 164 | [1] | 172 | 142 |
With an allowance recorded | 409 |  | 451 | 350 |
Total | 573 | [1] | 623 | 492 |
Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 30 | [1]
With an allowance recorded | 0 | [1] | 0 | 30 |
Total | 0 | [1] | 0 | 60 |
Cash Basis Interest Income Recognized |  |  |  |  |
With no related allowance recorded | 0 | [1] | 0 | 30 |
With an allowance recorded | 0 | [1] | 0 | 30 |
Total | $ 0 | [1] | $ 0 | $ 60 |
[1] | For the three months ended March 31, 2020

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