v2.4.0.6
Portfolio Loans Not Covered by Loss Share ("Non-covered") - Summary of Recorded Investment by Risk Category of Non-covered Loans by Portfolio Class and Category (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Mar. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Credit Quality, Time Period Expected to Return to Perform 12 months    
Total   $ 2,085,872 $ 2,106,039
Non-Covered Loans
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   2,085,428 2,106,028
Total   2,085,872 2,106,039
Non-Covered Loans | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   1,830,957 1,865,490
Non-Covered Loans | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   157,758 136,036
Non-Covered Loans | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   95,268 101,808
Non-Covered Loans | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   1,889 2,705
Non-Covered Loans | Commercial & Industrial
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   949,171 962,884
Non-Covered Loans | Commercial & Industrial | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   886,837 912,766
Non-Covered Loans | Commercial & Industrial | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   45,853 29,524
Non-Covered Loans | Commercial & Industrial | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   15,240 18,546
Non-Covered Loans | Commercial & Industrial | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   1,241 2,048
Non-Covered Loans | Real Estate
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   1,116,538 1,126,178
Non-Covered Loans | Real Estate | Commercial - Owner Occupied
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   339,086 333,242
Non-Covered Loans | Real Estate | Commercial - Owner Occupied | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   295,426 290,850
Non-Covered Loans | Real Estate | Commercial - Owner Occupied | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   29,282 26,336
Non-Covered Loans | Real Estate | Commercial - Owner Occupied | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   14,220 15,898
Non-Covered Loans | Real Estate | Commercial - Owner Occupied | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   158 158
Non-Covered Loans | Real Estate | Commercial - Investor Owned
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   473,003 486,467
Non-Covered Loans | Real Estate | Commercial - Investor Owned | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   383,856 389,886
Non-Covered Loans | Real Estate | Commercial - Investor Owned | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   60,182 64,707
Non-Covered Loans | Real Estate | Commercial - Investor Owned | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   28,965 31,874
Non-Covered Loans | Real Estate | Commercial - Investor Owned | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   0 0
Non-Covered Loans | Real Estate | Construction and Land Development
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   156,221 160,911
Non-Covered Loans | Real Estate | Construction and Land Development | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   114,896 124,857
Non-Covered Loans | Real Estate | Construction and Land Development | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   14,684 9,543
Non-Covered Loans | Real Estate | Construction and Land Development | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   26,151 26,012
Non-Covered Loans | Real Estate | Construction and Land Development | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   490 499
Non-Covered Loans | Real Estate | Residential
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   148,228 145,558
Non-Covered Loans | Real Estate | Residential | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   129,784 130,159
Non-Covered Loans | Real Estate | Residential | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   7,752 5,921
Non-Covered Loans | Real Estate | Residential | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   10,692 9,478
Non-Covered Loans | Real Estate | Residential | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   0 0
Non-Covered Loans | Consumer & Other
     
Financing Receivable, Recorded Investment [Line Items]      
Portfolio Loans   19,719 16,966
Total   20,163 16,977
Non-Covered Loans | Consumer & Other | Pass (1-6)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   20,158 16,972
Non-Covered Loans | Consumer & Other | Watch (7)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   5 5
Non-Covered Loans | Consumer & Other | Substandard (8)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   0 0
Non-Covered Loans | Consumer & Other | Doubtful (9)
     
Financing Receivable, Recorded Investment [Line Items]      
Total   $ 0 $ 0