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Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 33,731 | $ 55,686
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 100.00% | 100.00%
Non-accrual loans as % of total loans | 0.28% | 0.49%
Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 25,271 | $ 27,643
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 74.90% | 49.60%
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 0 | $ 2,427
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.00% | 4.40%
Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 169 | $ 920
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.50% | 1.70%
Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 246 | $ 787
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.70% | 1.40%
Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 5,835 | $ 8,971
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 17.30% | 16.10%
Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 1,292 | $ 14,394
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 3.80% | 25.80%
HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 907 | $ 523
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 2.70% | 0.90%
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual loans by portfolio segment | $ 11 | $ 21
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual 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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