Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Common stock, par value (usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (shares) 450,000,000 450,000,000
Common stock, shares issued (shares) 135,758,269 135,244,379
Common stock, shares outstanding (shares) 135,592,045 135,244,379
Preferred stock, par value (usd per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (shares) 50,000,000 50,000,000
Preferred stock, shares issued (shares) 0 0
Preferred stock, shares outstanding (shares) 0 0
Treasury stock (shares) 166,224 0