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Servicing Assets - SBA Loans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2012
Servicing Assets - SBA Loans
Sep. 30, 2011
Servicing Assets - SBA Loans
Sep. 30, 2012
Servicing Assets - SBA Loans
Sep. 30, 2011
Servicing Assets - SBA Loans
Sep. 30, 2012
Servicing Assets - SBA Loans
Minimum
Sep. 30, 2012
Servicing Assets - SBA Loans
Maximum
Changes in amortized servicing assets                
Beginning Balance     $ 1,271 $ 1,152 $ 1,193 $ 954    
Servicing Assets capitalized     54 60 255 361    
Servicing Assets amortized     (60) (53) (183) (156)    
Ending Balance     1,265 1,159 1,265 1,159    
Reserve for impairment of servicing assets                
Beginning Balance     (126) (185) (103) (118)    
Impairments     (32)   (58) (75)    
Recoveries     1 75 4 83    
Ending Balance     (157) (110) (157) (110)    
Amortized servicing assets                
Ending Balance (net of reserve) 1,108 1,090 1,108 1,049 1,108 1,049    
Fair value of amortized servicing assets                
Beginning Balance     1,389 1,019 1,326 921    
Ending Balance     $ 1,376 $ 1,265 $ 1,376 $ 1,265    
Significant assumptions for estimated fair value of servicing assets                
Discount rate (as a percent)         13.70%      
Prepayment speed (as a percent)             14.00% 15.00%