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Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual percent of total loans | 0.27% | 0.28%
Non-accrual loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 32,610 | $ 33,731
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 100.00% | 100.00%
Non-accrual loans | Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 22,859 | $ 25,271
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 70.10% | 74.90%
Non-accrual loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 3,353 | $ 0
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 10.30% | 0.00%
Non-accrual loans | Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 82 | $ 169
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 0.30% | 0.50%
Non-accrual loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 408 | $ 246
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 1.20% | 0.70%
Non-accrual loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 4,374 | $ 5,835
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 13.40% | 17.30%
Non-accrual loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 470 | $ 1,292
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 1.40% | 3.80%
Non-accrual loans | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 1,064 | $ 907
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 3.30% | 2.70%
Non-accrual loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 0 | $ 11
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 0.00% | 0.00%

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- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524 + Details
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