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Loans Receivable - Loans on Non-accrual Status (Details) - Non-Acquired loans - USD ($) $ in Thousands | Mar. 31, 2017 | Sep. 30, 2016
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 57,195 | $ 42,414
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 100.00% | 100.00%
Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 34,373 | $ 33,148
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 60.10% | 78.20%
Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 240 | $ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.40% | 0.00%
Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 80 | $ 58
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.10% | 0.10%
Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 1,129 | $ 510
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 2.00% | 1.20%
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 1,364 | $ 776
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 2.40% | 1.80%
Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 10,507 | $ 7,100
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 18.40% | 16.70%
Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 8,864 | $ 583
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 15.50% | 1.40%
HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 583 | $ 239
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 1.00% | 0.60%
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual of interest | $ 55 | $ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status | 0.10% | 0.00%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
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