Other Real Estate Owned (Components of other real estate owned) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Real Estate Properties [Line Items]            
Total OREO $ 5,636 $ 5,267 $ 6,650 $ 7,378 $ 7,818 $ 4,429
Percentage of OREO 100.00%   100.00%      
Single family residence
           
Real Estate Properties [Line Items]            
Total OREO 122   166      
Percentage of OREO 2.20%   2.50%      
Developed residential lots
           
Real Estate Properties [Line Items]            
Total OREO 1,308   2,048      
Percentage of OREO 23.20%   30.80%      
Commercial buildings
           
Real Estate Properties [Line Items]            
Total OREO 435   483      
Percentage of OREO 7.70%   7.30%      
Raw land
           
Real Estate Properties [Line Items]            
Total OREO $ 3,771   $ 3,953      
Percentage of OREO 66.90%   59.40%