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Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 1,000,000,000 1,000,000,000
Common stock, shares issued 381,900,610 380,104,970
Common stock, shares outstanding 381,900,610 380,104,970