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Participation in the Treasury Capital Purchase Program (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 6 Months Ended
Jan. 31, 2009
Jun. 30, 2012
Jan. 23, 2009
Participation in the Treasury Capital Purchase Program (Textual) [Abstract]      
Sale to U.S. Treasury of newly-issued non-voting preferred shares $ 23,184    
Warrant sold to purchase common shares as per securities purchase agreement     469,312
Liquidation preference as per securities purchase agreement     $ 1,000
Amount of common shares not considered in computing diluted earnings per common share     $ 7.41
Term of warrant   10 years  
Liquidation preference rate for first five years   5.00%  
Liquidation preference rate after five years   9.00%