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Loans Receivable (excluding Covered Loans) - Troubled Debt Restructurings and Loan Modifications (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 contract | Sep. 30, 2013 contract
Financing Receivable, Modifications [Line Items] |  |
Approximate rate reduction concession, minimum | 1.00% |
Approximate rate reduction concession, maximum | 2.00% |
Trouble Debt Restructuring included in impaired loans | $ 374,743 | $ 415,696
Single family residential loans as percentage of restructured loans | 86.00% | 86.00%
Number of contracts | 267 | 453
Pre-modification, outstanding recorded investment | 59,803 | 123,463
Post-modification, outstanding recorded investment | 59,803 | 123,463
Subsequent default, number of contracts | 46 | 83
Subsequent default, recorded investment | 8,396 | 20,139
Single-family residential |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 241 | 406
Pre-modification, outstanding recorded investment | 52,900 | 105,551
Post-modification, outstanding recorded investment | 52,900 | 105,551
Subsequent default, number of contracts | 38 | 78
Subsequent default, recorded investment | 7,427 | 17,120
Construction - speculative |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 0 | 1
Pre-modification, outstanding recorded investment | 0 | 2,470
Post-modification, outstanding recorded investment | 0 | 2,470
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | 0 | 0
Construction - custom |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 0 | 0
Pre-modification, outstanding recorded investment | 0 | 0
Post-modification, outstanding recorded investment | 0 | 0
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | 0 | 0
Land - acquisition & development |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 3 | 1
Pre-modification, outstanding recorded investment | 631 | 461
Post-modification, outstanding recorded investment | 631 | 461
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | 0 | 0
Land - consumer lot loans |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 13 | 25
Pre-modification, outstanding recorded investment | 2,315 | 3,134
Post-modification, outstanding recorded investment | 2,315 | 3,134
Subsequent default, number of contracts | 8 | 2
Subsequent default, recorded investment | 969 | 237
Multi-family |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 2 | 1
Pre-modification, outstanding recorded investment | 1,196 | 36
Post-modification, outstanding recorded investment | 1,196 | 36
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | 0 | 0
Commercial real estate |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 3 | 15
Pre-modification, outstanding recorded investment | 2,177 | 11,523
Post-modification, outstanding recorded investment | 2,177 | 11,523
Subsequent default, number of contracts | 0 | 2
Subsequent default, recorded investment | 0 | 2,703
Commercial & industrial |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 0 | 1
Pre-modification, outstanding recorded investment | 0 | 56
Post-modification, outstanding recorded investment | 0 | 56
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | 0 | 0
HELOC |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 2 | 1
Pre-modification, outstanding recorded investment | 549 | 199
Post-modification, outstanding recorded investment | 549 | 199
Subsequent default, number of contracts | 0 | 1
Subsequent default, recorded investment | 0 | 79
Consumer |  |
Financing Receivable, Modifications [Line Items] |  |
Number of contracts | 3 | 2
Pre-modification, outstanding recorded investment | 35 | 33
Post-modification, outstanding recorded investment | 35 | 33
Subsequent default, number of contracts | 0 | 0
Subsequent default, recorded investment | $ 0 | $ 0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Single Family Residential Loans as Percentage of Restructured Loans + References No definition available. + Details
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