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CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) [Parenthetical] (USD $)
Jun. 30, 2011
Dec. 31, 2010
Common stock, par value per share (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 18,291,083 18,067,925
Treasury stock, shares 801,920 801,920