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Covered Assets (Aging Analysis of Non-Credit Impaired Loans) (Details) (USD $) | Dec. 31, 2011 | Sep. 30, 2011
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans |  | $ 495,358,000
Acquired Non Impaired Assets [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 267,155,000 | 292,421,000
Loans and Leases Receivable, Covered Loans, Current | 251,747,000 | 273,600,000
Loans and Leases Receivable, Covered Loans, 30 Days | 6,274,000 | 7,432,000
Loans and Leases Receivable, Covered Loans, 60 Days | 2,041,000 | 1,132,000
Loans and Leases Receivable, Covered Assets, 90 Days | 7,093,000 | 10,257,000
Loans and Leases Receivable, Covered Assets, Past Due | 15,408,000 | 18,821,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 5.77% | 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 | 43,196,000 | 46,214,000
Loans and Leases Receivable, Covered Loans, Current | 40,188,000 | 43,445,000
Loans and Leases Receivable, Covered Loans, 30 Days | 934,000 | 1,034,000
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 30,000
Loans and Leases Receivable, Covered Assets, 90 Days | 2,074,000 | 1,705,000
Loans and Leases Receivable, Covered Assets, Past Due | 3,008,000 | 2,769,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 6.96% | 5.99%
Acquired Non Impaired Assets [Member] | Construction, Speculative [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 725,000 | 1,315,000
Loans and Leases Receivable, Covered Loans, Current | 725,000 | 1,315,000
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 | 14,629,000 | 15,058,000
Loans and Leases Receivable, Covered Loans, Current | 13,002,000 | 13,344,000
Loans and Leases Receivable, Covered Loans, 30 Days | 399,000 | 487,000
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 1,228,000 | 1,227,000
Loans and Leases Receivable, Covered Assets, Past Due | 1,627,000 | 1,714,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 11.12% | 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 | 523,000 | 654,000
Loans and Leases Receivable, Covered Loans, Current | 507,000 | 527,000
Loans and Leases Receivable, Covered Loans, 30 Days | 16,000 | 16,000
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 111,000
Loans and Leases Receivable, Covered Assets, Past Due | 16,000 | 127,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 3.06% | 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 | 33,084,000 | 34,906,000
Loans and Leases Receivable, Covered Loans, Current | 31,576,000 | 33,398,000
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 | 1,508,000 | 1,508,000
Loans and Leases Receivable, Covered Assets, Past Due | 1,508,000 | 1,508,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 4.56% | 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 | 135,002,000 | 148,464,000
Loans and Leases Receivable, Covered Loans, Current | 131,871,000 | 142,060,000
Loans and Leases Receivable, Covered Loans, 30 Days | 205,000 | 1,527,000
Loans and Leases Receivable, Covered Loans, 60 Days | 1,680,000 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 1,246,000 | 4,877,000
Loans and Leases Receivable, Covered Assets, Past Due | 3,131,000 | 6,404,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 2.32% | 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 | 17,340,000 | 22,881,000
Loans and Leases Receivable, Covered Loans, Current | 12,671,000 | 18,049,000
Loans and Leases Receivable, Covered Loans, 30 Days | 3,723,000 | 3,606,000
Loans and Leases Receivable, Covered Loans, 60 Days | 207,000 | 703,000
Loans and Leases Receivable, Covered Assets, 90 Days | 739,000 | 523,000
Loans and Leases Receivable, Covered Assets, Past Due | 4,669,000 | 4,832,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 26.93% | 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 | 21,595,000 | 21,730,000
Loans and Leases Receivable, Covered Loans, Current | 20,200,000 | 20,339,000
Loans and Leases Receivable, Covered Loans, 30 Days | 948,000 | 731,000
Loans and Leases Receivable, Covered Loans, 60 Days | 150,000 | 391,000
Loans and Leases Receivable, Covered Assets, 90 Days | 297,000 | 269,000
Loans and Leases Receivable, Covered Assets, Past Due | 1,395,000 | 1,391,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 6.46% | 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 | 1,061,000 | 1,199,000
Loans and Leases Receivable, Covered Loans, Current | 1,007,000 | 1,123,000
Loans and Leases Receivable, Covered Loans, 30 Days | 49,000 | 31,000
Loans and Leases Receivable, Covered Loans, 60 Days | 4,000 | 8,000
Loans and Leases Receivable, Covered Assets, 90 Days | 1,000 | 37,000
Loans and Leases Receivable, Covered Assets, Past Due | $ 54,000 | $ 76,000
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process | 5.09% | 6.34%

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