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Loans Receivable - Schedule of Covered Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | $ 12,201,387 | $ 10,950,608
FDIC Indemnification Asset Movement Analysis |  |
Balance at beginning of year | 12,769 | 16,275
Payments received | (584) | (1,730)
Amortization | (3,450) | (2,012)
Accretion | 232 | 236
Balance at end of year | 8,967 | 12,769
Covered Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | $ 20,572 | $ 28,974

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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 Amount of decreases to the indemnification asset due to cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition FDIC Indemnification Asset, Amortization + References No definition available. + Details
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- Definition FDIC Indemnification Asset, Discount Accretion + References No definition available. + Details
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- Definition FDIC Indemnification Asset Movement Analysis [Roll Forward] + References No definition available. + Details
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- Definition The net present value of the amount expected to be received from the FDIC in connection with loss share agreements. + References No definition available. + Details
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- Details
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