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Capital Purchase Program (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Capital Purchase Program (Textual) [Abstract]    
Liquidation preference $ 1,000 $ 1,000
Discount on preferred stock amortized period 5 years  
Purchase Agreement [Member]
    
Capital Purchase Program (Textual) [Abstract]    
Aggregate purchase price $ 13.9  
Closing of sale Mar. 13, 2009  
Cumulative dividend for first five years 5.00%  
Cumulative dividend thereafter 9.00%  
Fixed Rate Cumulative Perpetual Preferred Stock, Series A [Member] | Purchase Agreement [Member]
    
Capital Purchase Program (Textual) [Abstract]    
Number of shares 13,900  
Par value $ 1.25  
Liquidation preference $ 1,000  
Fixed Rate Cumulative Perpetual Preferred Stock, Series B [Member]
    
Capital Purchase Program (Textual) [Abstract]    
Increase in total Capital $ 13.9  
Cumulative dividends of warrant preferred stock 9.00%  
Fixed Rate Cumulative Perpetual Preferred Stock, Series B [Member] | Purchase Agreement [Member]
    
Capital Purchase Program (Textual) [Abstract]    
Number of shares 695  
Exercise price 1.25