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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Common Stock
   
Cash dividends, per share $ 0.02 $ 0.02
Shares granted to directors 17,162 18,584
Restricted Stock
   
Restricted share awards vested   6,000