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Loans Receivable and Allowance for Loan Losses: Schedule of Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | $ 9,690 | $ 9,530 | $ 9,553
Provision for (Recapture of) Loan Losses | 3,700 | 0 | 0
Charge-offs | (27) | (161) | (56)
Recoveries | 51 | 321 | 33
Allowance for loan losses, Ending Allowance | 13,414 | 9,690 | 9,530
Mortgage loans, one-to-four family |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 1,167 | 1,086 | 1,082
Provision for (Recapture of) Loan Losses | (6) | (23) | 4
Charge-offs | 0 | 0 | 0
Recoveries | 2 | 104 | 0
Allowance for loan losses, Ending Allowance | 1,163 | 1,167 | 1,086
Mortgage loans, multi-family |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 481 | 433 | 447
Provision for (Recapture of) Loan Losses | 237 | 48 | (14)
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Allowance for loan losses, Ending Allowance | 718 | 481 | 433
Mortgage loans, commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 4,154 | 4,248 | 4,184
Provision for (Recapture of) Loan Losses | 2,984 | (260) | 92
Charge-offs | 0 | 0 | (28)
Recoveries | 6 | 166 | 0
Allowance for loan losses, Ending Allowance | 7,144 | 4,154 | 4,248
Mortgage loans, construction - custom and owner/builder |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 755 | 671 | 699
Provision for (Recapture of) Loan Losses | 72 | 82 | (28)
Charge-offs | 0 | 0 | 0
Recoveries | 5 | 2 | 0
Allowance for loan losses, Ending Allowance | 832 | 755 | 671
Mortgage loans, construction - speculative one-to-four family |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 212 | 178 | 128
Provision for (Recapture of) Loan Losses | (54) | 34 | 37
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 13
Allowance for loan losses, Ending Allowance | 158 | 212 | 178
Mortgage loans, construction - commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 338 | 563 | 303
Provision for (Recapture of) Loan Losses | 82 | (225) | 260
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Allowance for loan losses, Ending Allowance | 420 | 338 | 563
Mortgage loans, construction - multi-family |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 375 | 135 | 173
Provision for (Recapture of) Loan Losses | (137) | 240 | (38)
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Allowance for loan losses, Ending Allowance | 238 | 375 | 135
Mortgage loans - construction - land development |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 67 | 49 | 0
Provision for (Recapture of) Loan Losses | 66 | 18 | 49
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Allowance for loan losses, Ending Allowance | 133 | 67 | 49
Mortgage loans, land |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 697 | 844 | 918
Provision for (Recapture of) Loan Losses | (145) | (116) | (71)
Charge-offs | 0 | (49) | (22)
Recoveries | 20 | 18 | 19
Allowance for loan losses, Ending Allowance | 572 | 697 | 844
Consumer loans, home equity and second mortgage |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 623 | 649 | 983
Provision for (Recapture of) Loan Losses | (45) | (21) | (334)
Charge-offs | 0 | (5) | 0
Recoveries | 15 | 0 | 0
Allowance for loan losses, Ending Allowance | 593 | 623 | 649
Consumer loans, other |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 99 | 117 | 121
Provision for (Recapture of) Loan Losses | (19) | (19) | 1
Charge-offs | (12) | (5) | (6)
Recoveries | 3 | 6 | 1
Allowance for loan losses, Ending Allowance | 71 | 99 | 117
Commercial business loans |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Allowance for loan losses, Beginning Allowance | 722 | 557 | 515
Provision for (Recapture of) Loan Losses | 665 | 242 | 42
Charge-offs | (15) | (102) | 0
Recoveries | 0 | 25 | 0
Allowance for loan losses, Ending Allowance | $ 1,372 | $ 722 | $ 557

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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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