Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 125,000,000 125,000,000
Common stock, shares issued 36,010,224 35,613,351
Treasury stock, shares 0 0