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Consolidated Statements of Changes In Shareholders' Equity (Unaudited) (Parenthetical) (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Shares issued using employee stock purchase plan 2,193 5,086
Shares issued using stock option exercises 8,800  
Shares issued using dividend reinvestment plan 644 687
Cash dividends per share $ 0.00 $ 0.01
Common Stock
   
Shares issued using employee stock purchase plan 2,193 5,086
Shares issued using stock option exercises 8,800  
Shares issued using dividend reinvestment plan 644 687
Cash dividends per share   $ 0.01