Loans (Details 7) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Summary of total loans    
Loans not rated by class of loans $ 118,879 $ 112,550
Commercial [Member]
   
Summary of total loans    
Loans not rated by class of loans 9 755
Commercial real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 3,093 2,415
Residential real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 108,285 102,306
Construction & land development [Member]
   
Summary of total loans    
Loans not rated by class of loans 1,243 858
Consumer [Member]
   
Summary of total loans    
Loans not rated by class of loans 6,249 6,216
Performing [Member]
   
Summary of total loans    
Loans not rated by class of loans 117,814 111,120
Performing [Member] | Commercial [Member]
   
Summary of total loans    
Loans not rated by class of loans 9 755
Performing [Member] | Commercial real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 3,039 2,415
Performing [Member] | Residential real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 107,274 100,892
Performing [Member] | Construction & land development [Member]
   
Summary of total loans    
Loans not rated by class of loans 1,243 850
Performing [Member] | Consumer [Member]
   
Summary of total loans    
Loans not rated by class of loans 6,249 6,208
Non-Performing [Member]
   
Summary of total loans    
Loans not rated by class of loans 1,065 1,430
Non-Performing [Member] | Commercial [Member]
   
Summary of total loans    
Loans not rated by class of loans 0 0
Non-Performing [Member] | Commercial real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 54 0
Non-Performing [Member] | Residential real estate [Member]
   
Summary of total loans    
Loans not rated by class of loans 1,011 1,414
Non-Performing [Member] | Construction & land development [Member]
   
Summary of total loans    
Loans not rated by class of loans 0 8
Non-Performing [Member] | Consumer [Member]
   
Summary of total loans    
Loans not rated by class of loans $ 0 $ 8