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Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual percent of total loans | 0.34% |
Non-accrual loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 41,005 | $ 55,686
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 | $ 22,285 | $ 27,643
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 54.30% | 49.60%
Non-accrual loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 0 | $ 2,427
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 0.00% | 4.40%
Non-accrual loans | Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 1,161 | $ 0
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 2.80% | 0.00%
Non-accrual loans | Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 173 | $ 920
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 0.40% | 1.70%
Non-accrual loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 641 | $ 787
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 1.60% | 1.40%
Non-accrual loans | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 1,431 | $ 0
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 3.50% | 0.00%
Non-accrual loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 8,464 | $ 8,971
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 20.60% | 16.10%
Non-accrual loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 6,047 | $ 14,394
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 14.70% | 25.80%
Non-accrual loans | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 803 | $ 523
Ratio of non-accrual loan by portfolio segment to total loans on non-accrual status | 2.00% | 0.90%
Non-accrual loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 0 | $ 21
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=84173941&loc=d3e5111-111524 + Details
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