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Covered Assets (Credit Risk Profile by Internally Assigned Grade by Loan Status Designation) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Sep. 30, 2011
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans   $ 495,358
Loans and Leases Receivable, Covered Loans, Gross 422,647 495,358
Discount balance related to acquired loans (97,247) (109,409)
Covered loans, allowance for losses (3,766) (3,766)
Loans and Leases Receivable, Covered Loans, Net Reported Amount 321,634 382,183
Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 254,137 292,421
Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 168,510 202,937
Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 40,784 46,214
Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 6,082 11,930
Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 734 1,315
Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 14,061 15,058
Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 507 654
Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 32,588 34,906
Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 3,043 3,324
Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 129,198 148,464
Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 72,582 79,066
Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 15,541 22,881
Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 21,648 32,018
Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 19,705 21,730
Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,019 1,199
Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 58,584 67,644
Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 6,571 8,955
Pass [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 94.50% 94.10%
Pass [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 80.20% 83.10%
Outstanding principal balance of acquired loans 203,771 243,078
Pass [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 19,844 20,470
Pass [Member] | Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 37,588 45,619
Pass [Member] | Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 2,038 3,667
Pass [Member] | Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 734 1,315
Pass [Member] | Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Pass [Member] | Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 7,632 8,383
Pass [Member] | Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 507 543
Pass [Member] | Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 29,828 32,448
Pass [Member] | Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 99,296 118,124
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 411 418
Pass [Member] | Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 7,462 13,717
Pass [Member] | Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 4,983 2,859
Pass [Member] | Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 19,705 21,730
Pass [Member] | Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,019 1,199
Pass [Member] | Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 10,415 9,982
Pass [Member] | Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,997 3,544
Special Mention [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 0.60% 0.90%
Special Mention [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 3.00% 4.20%
Outstanding principal balance of acquired loans 7,669 12,157
Special Mention [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 40,730 36,284
Special Mention [Member] | Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 5,398 6,315
Special Mention [Member] | Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 3,043 0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,115 1,361
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 30,259 30,579
Special Mention [Member] | Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,156 4,481
Special Mention [Member] | Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,556 2,725
Special Mention [Member] | Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Special Mention [Member] | Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 5,872 2,980
Special Mention [Member] | Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Substandard [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 4.90% 5.00%
Substandard [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 16.80% 12.60%
Outstanding principal balance of acquired loans 42,697 36,742
Substandard [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 107,936 145,411
Substandard [Member] | Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 3,196 595
Substandard [Member] | Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 4,044 8,263
Substandard [Member] | Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Substandard [Member] | Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Substandard [Member] | Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 1,031 360
Substandard [Member] | Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 111
Substandard [Member] | Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 2,760 2,458
Substandard [Member] | Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 3,324
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 28,787 28,979
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 41,912 48,069
Substandard [Member] | Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 6,923 4,239
Substandard [Member] | Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 15,109 25,662
Substandard [Member] | Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Substandard [Member] | Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Substandard [Member] | Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 42,297 54,682
Substandard [Member] | Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 4,574 5,411
Doubtful [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 0.00% 0.00%
Doubtful [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 0.00% 0.20%
Outstanding principal balance of acquired loans 0 444
Doubtful [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 772
Doubtful [Member] | Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 444
Doubtful [Member] | Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 772
Doubtful [Member] | Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Doubtful [Member] | Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 0.00% 0.00%
Loss [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Grade as percentage of total gross loans 0.00% 0.00%
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Single Family Residential [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Single Family Residential [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Construction, Speculative [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Construction, Custom [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Land, Acquisition and Development [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Land, Consumer Lot Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Multi Family Housing [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Multi Family Housing [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Commercial and Industrial Loans [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Commercial and Industrial Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Home Equity Line of Credit [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Consumer Portfolio Segment [Member] | Acquired Non Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Construction, Speculative and Land, Acquisition and Development [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans 0 0
Loss [Member] | Home Equity Line of Credit and Other Consumer Loans [Member] | Acquired Impaired Assets [Member]
    
Covered Assets, Loan Status Designation [Line Items]    
Outstanding principal balance of acquired loans $ 0 $ 0