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Covered Assets (Aging Analysis of Non-Credit Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Sep. 30, 2011
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans |  | $ 495,358
Acquired Non Impaired Assets [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 244,860 | 292,421
Loans and Leases Receivable, Covered Loans, Current | 234,648 | 273,600
Loans and Leases Receivable, Covered Loans, 30 Days | 606 | 7,432
Loans and Leases Receivable, Covered Loans, 60 Days | 255 | 1,132
Loans and Leases Receivable, Covered Assets, 90 Days | 9,351 | 10,257
Loans and Leases Receivable, Covered Assets, Past Due | 10,212 | 18,821
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 4.17% | 6.44%
Acquired Non Impaired Assets [Member] | Single Family Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 38,742 | 46,214
Loans and Leases Receivable, Covered Loans, Current | 36,523 | 43,445
Loans and Leases Receivable, Covered Loans, 30 Days | 81 | 1,034
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 30
Loans and Leases Receivable, Covered Assets, 90 Days | 2,138 | 1,705
Loans and Leases Receivable, Covered Assets, Past Due | 2,219 | 2,769
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 5.73% | 5.99%
Acquired Non Impaired Assets [Member] | Construction, Speculative [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 0 | 1,315
Loans and Leases Receivable, Covered Loans, Current | 0 | 1,315
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 0
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, Past Due | 0 | 0
Acquired Non Impaired Assets [Member] | Construction, Custom [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 0 | 0
Loans and Leases Receivable, Covered Loans, Current | 0 | 0
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 0
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, Past Due | 0 | 0
Acquired Non Impaired Assets [Member] | Land, Acquisition and Development [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 13,323 | 15,058
Loans and Leases Receivable, Covered Loans, Current | 12,847 | 13,344
Loans and Leases Receivable, Covered Loans, 30 Days | 476 | 487
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 1,227
Loans and Leases Receivable, Covered Assets, Past Due | 476 | 1,714
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 3.57% | 11.38%
Acquired Non Impaired Assets [Member] | Land, Consumer Lot Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 503 | 654
Loans and Leases Receivable, Covered Loans, Current | 405 | 527
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 16
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 98 | 111
Loans and Leases Receivable, Covered Assets, Past Due | 98 | 127
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 19.48% | 19.42%
Acquired Non Impaired Assets [Member] | Multi Family Housing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 32,101 | 34,906
Loans and Leases Receivable, Covered Loans, Current | 30,593 | 33,398
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 0
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 1,508 | 1,508
Loans and Leases Receivable, Covered Assets, Past Due | 1,508 | 1,508
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 4.70% | 4.32%
Acquired Non Impaired Assets [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 125,334 | 148,464
Loans and Leases Receivable, Covered Loans, Current | 123,411 | 142,060
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 1,527
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 1,923 | 4,877
Loans and Leases Receivable, Covered Assets, Past Due | 1,923 | 6,404
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 1.53% | 4.31%
Acquired Non Impaired Assets [Member] | Commercial and Industrial Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 14,577 | 22,881
Loans and Leases Receivable, Covered Loans, Current | 11,094 | 18,049
Loans and Leases Receivable, Covered Loans, 30 Days | 30 | 3,606
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 703
Loans and Leases Receivable, Covered Assets, 90 Days | 3,453 | 523
Loans and Leases Receivable, Covered Assets, Past Due | 3,483 | 4,832
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 23.89% | 21.12%
Acquired Non Impaired Assets [Member] | Home Equity Line of Credit [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 19,307 | 21,730
Loans and Leases Receivable, Covered Loans, Current | 18,814 | 20,339
Loans and Leases Receivable, Covered Loans, 30 Days | 18 | 731
Loans and Leases Receivable, Covered Loans, 60 Days | 244 | 391
Loans and Leases Receivable, Covered Assets, 90 Days | 231 | 269
Loans and Leases Receivable, Covered Assets, Past Due | 493 | 1,391
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 2.55% | 6.40%
Acquired Non Impaired Assets [Member] | Consumer Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 973 | 1,199
Loans and Leases Receivable, Covered Loans, Current | 961 | 1,123
Loans and Leases Receivable, Covered Loans, 30 Days | 1 | 31
Loans and Leases Receivable, Covered Loans, 60 Days | 11 | 8
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 37
Loans and Leases Receivable, Covered Assets, Past Due | $ 12 | $ 76
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 1.23% | 6.34%

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