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Covered Assets - Aging Analysis of Non-Credit Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | $ 210,959 | $ 362,248
Credit-impaired acquired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 110,798 | 195,612
Acquired non-impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 100,161 | 166,636
Loans and leases receivable, covered loans, current | 98,342 |
Loans and leases receivable, covered loans, 30 days | 241 |
Loans and leases receivable, covered loans, 60 days | 40 |
Loans and leases receivable, covered assets, 90 days | 1,538 |
Loans and leases receivable, covered assets, past due | 1,819 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 1.82% |
Acquired non-impaired loans | Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 23,067 |
Loans and leases receivable, covered loans, current | 22,391 |
Loans and leases receivable, covered loans, 30 days | 230 |
Loans and leases receivable, covered loans, 60 days | 40 |
Loans and leases receivable, covered assets, 90 days | 406 |
Loans and leases receivable, covered assets, past due | 676 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 2.93% |
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 | 1,364 |
Loans and leases receivable, covered loans, current | 1,328 |
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 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 2.64% |
Acquired non-impaired loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 73 |
Loans and leases receivable, covered loans, current | 73 |
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 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 0.00% |
Acquired non-impaired loans | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 6,598 |
Loans and leases receivable, covered loans, current | 5,502 |
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 | 1,096 |
Loans and leases receivable, covered assets, past due | 1,096 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 16.61% |
Acquired non-impaired loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 51,336 |
Loans and leases receivable, covered loans, current | 51,336 |
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 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 0.00% |
Acquired non-impaired loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 5,492 |
Loans and leases receivable, covered loans, current | 5,492 |
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 |
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 | 11,777 |
Loans and leases receivable, covered loans, current | 11,777 |
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 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 0.00% |
Acquired non-impaired loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 454 |
Loans and leases receivable, covered loans, current | 443 |
Loans and leases receivable, covered loans, 30 days | 11 |
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 | $ 11 |
Ratio of total past due loans to total loans receivable, net of charge offs and loans in process | 2.42% |

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