Loans (Details 7) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of loans not rated by class of loans    
Loans not rated by class of loans $ 119,149 $ 112,550
Commercial [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 174 755
Commercial real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 3,112 2,415
Residential real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 108,191 102,306
Construction & Land Development [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 1,374 858
Consumer [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 6,298 6,216
Performing [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 118,405 111,120
Performing [Member] | Commercial [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 174 755
Performing [Member] | Commercial real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 3,112 2,415
Performing [Member] | Residential real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 107,454 100,892
Performing [Member] | Construction & Land Development [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 1,367 850
Performing [Member] | Consumer [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 6,268 6,208
Non-Performing [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 744 1,430
Non-Performing [Member] | Commercial [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 0 0
Non-Performing [Member] | Commercial real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 0 0
Non-Performing [Member] | Residential real estate [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 737 1,414
Non-Performing [Member] | Construction & Land Development [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans 7 8
Non-Performing [Member] | Consumer [Member]
   
Schedule of loans not rated by class of loans    
Loans not rated by class of loans $ 0 $ 8