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Covered Assets - Aging Analysis of Non-Credit Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Sep. 30, 2012
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | $ 362,248 | $ 373,455
Credit-impaired acquired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 195,612 | 144,612
Acquired non-impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 166,636 | 228,843
Loans and Leases Receivable, Covered Loans, Current | 159,195 |
Loans and Leases Receivable, Covered Loans, 30 Days | 2,963 |
Loans and Leases Receivable, Covered Loans, 60 Days | 529 |
Loans and Leases Receivable, Covered Assets, 90 Days | 3,949 |
Loans and Leases Receivable, Covered Assets, Past Due | 7,441 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 4.47% |
Acquired non-impaired loans | Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 28,460 |
Loans and Leases Receivable, Covered Loans, Current | 27,411 |
Loans and Leases Receivable, Covered Loans, 30 Days | 78 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 971 |
Loans and Leases Receivable, Covered Assets, Past Due | 1,049 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 3.69% |
Acquired non-impaired loans | Construction - speculative |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 0 |
Loans and Leases Receivable, Covered Loans, Current | 0 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 0 |
Loans and Leases Receivable, Covered Assets, Past Due | 0 |
Acquired non-impaired loans | Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 0 |
Loans and Leases Receivable, Covered Loans, Current | 0 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 0 |
Loans and Leases Receivable, Covered Assets, Past Due | 0 |
Acquired non-impaired loans | Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 4,810 |
Loans and Leases Receivable, Covered Loans, Current | 4,774 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 36 |
Loans and Leases Receivable, Covered Assets, Past Due | 36 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 0.75% |
Acquired non-impaired loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 245 |
Loans and Leases Receivable, Covered Loans, Current | 199 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 46 |
Loans and Leases Receivable, Covered Assets, Past Due | 46 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 18.78% |
Acquired non-impaired loans | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 18,852 |
Loans and Leases Receivable, Covered Loans, Current | 17,511 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 1,341 |
Loans and Leases Receivable, Covered Assets, Past Due | 1,341 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 7.11% |
Acquired non-impaired loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 89,499 |
Loans and Leases Receivable, Covered Loans, Current | 84,949 |
Loans and Leases Receivable, Covered Loans, 30 Days | 2,779 |
Loans and Leases Receivable, Covered Loans, 60 Days | 455 |
Loans and Leases Receivable, Covered Assets, 90 Days | 1,316 |
Loans and Leases Receivable, Covered Assets, Past Due | 4,550 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 5.08% |
Acquired non-impaired loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 9,416 |
Loans and Leases Receivable, Covered Loans, Current | 9,416 |
Loans and Leases Receivable, Covered Loans, 30 Days | 0 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 0 |
Loans and Leases Receivable, Covered Assets, Past Due | 0 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 0.00% |
Acquired non-impaired loans | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 14,750 |
Loans and Leases Receivable, Covered Loans, Current | 14,334 |
Loans and Leases Receivable, Covered Loans, 30 Days | 103 |
Loans and Leases Receivable, Covered Loans, 60 Days | 74 |
Loans and Leases Receivable, Covered Assets, 90 Days | 239 |
Loans and Leases Receivable, Covered Assets, Past Due | 416 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 2.82% |
Acquired non-impaired loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 604 |
Loans and Leases Receivable, Covered Loans, Current | 601 |
Loans and Leases Receivable, Covered Loans, 30 Days | 3 |
Loans and Leases Receivable, Covered Loans, 60 Days | 0 |
Loans and Leases Receivable, Covered Assets, 90 Days | 0 |
Loans and Leases Receivable, Covered Assets, Past Due | $ 3 |
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 0.50% |

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