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Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2016
Dec. 31, 2015
Shareholders’ Equity    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 150,000,000 150,000,000
Common stock, shares issued (in shares) 100,134,145 81,770,161
Treasury stock, shares (in shares) 3,123,971 3,026,350