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Covered Assets (Aging Analysis of Non-Credit Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 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 | 254,137 | 292,421
Loans and Leases Receivable, Covered Loans, Current | 243,228 | 273,600
Loans and Leases Receivable, Covered Loans, 30 Days | 2,782 | 7,432
Loans and Leases Receivable, Covered Loans, 60 Days | 518 | 1,132
Loans and Leases Receivable, Covered Assets, 90 Days | 7,609 | 10,257
Loans and Leases Receivable, Covered Assets, Past Due | 10,909 | 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 | 4.29% | 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 | 40,784 | 46,214
Loans and Leases Receivable, Covered Loans, Current | 38,794 | 43,445
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 1,034
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 30
Loans and Leases Receivable, Covered Assets, 90 Days | 1,990 | 1,705
Loans and Leases Receivable, Covered Assets, Past Due | 1,990 | 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 | 4.88% | 5.99%
Acquired Non Impaired Assets [Member] | Construction, Speculative [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding principal balance of acquired loans | 734 | 1,315
Loans and Leases Receivable, Covered Loans, Current | 734 | 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 | 14,061 | 15,058
Loans and Leases Receivable, Covered Loans, Current | 13,077 | 13,344
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 487
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 984 | 1,227
Loans and Leases Receivable, Covered Assets, Past Due | 984 | 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 | 7.00% | 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 | 507 | 654
Loans and Leases Receivable, Covered Loans, Current | 276 | 527
Loans and Leases Receivable, Covered Loans, 30 Days | 133 | 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 | 231 | 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 | 45.56% | 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 | 32,588 | 34,906
Loans and Leases Receivable, Covered Loans, Current | 31,080 | 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 | 4.63% | 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 | 129,198 | 148,464
Loans and Leases Receivable, Covered Loans, Current | 124,777 | 142,060
Loans and Leases Receivable, Covered Loans, 30 Days | 1,742 | 1,527
Loans and Leases Receivable, Covered Loans, 60 Days | 79 | 0
Loans and Leases Receivable, Covered Assets, 90 Days | 2,600 | 4,877
Loans and Leases Receivable, Covered Assets, Past Due | 4,421 | 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 | 3.42% | 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 | 15,541 | 22,881
Loans and Leases Receivable, Covered Loans, Current | 15,016 | 18,049
Loans and Leases Receivable, Covered Loans, 30 Days | 0 | 3,606
Loans and Leases Receivable, Covered Loans, 60 Days | 434 | 703
Loans and Leases Receivable, Covered Assets, 90 Days | 91 | 523
Loans and Leases Receivable, Covered Assets, Past Due | 525 | 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 | 3.38% | 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 | 19,705 | 21,730
Loans and Leases Receivable, Covered Loans, Current | 18,456 | 20,339
Loans and Leases Receivable, Covered Loans, 30 Days | 906 | 731
Loans and Leases Receivable, Covered Loans, 60 Days | 5 | 391
Loans and Leases Receivable, Covered Assets, 90 Days | 338 | 269
Loans and Leases Receivable, Covered Assets, Past Due | 1,249 | 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 | 6.34% | 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 | 1,019 | 1,199
Loans and Leases Receivable, Covered Loans, Current | 1,018 | 1,123
Loans and Leases Receivable, Covered Loans, 30 Days | 1 | 31
Loans and Leases Receivable, Covered Loans, 60 Days | 0 | 8
Loans and Leases Receivable, Covered Assets, 90 Days | 0 | 37
Loans and Leases Receivable, Covered Assets, Past Due | $ 1 | $ 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 | 0.10% | 6.34%

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