Annual report pursuant to Section 13 and 15(d)

SCHEDULE I CONDENSED FINANCIAL INFORMATION OF REGISTRANT - PARENT COMPANY BALANCE SHEETS (Parenthetical) (Details)

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SCHEDULE I CONDENSED FINANCIAL INFORMATION OF REGISTRANT - PARENT COMPANY BALANCE SHEETS (Parenthetical) (Details) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Preferred stock, par value (in usd per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 100,000,000 100,000,000
Preferred stock, shares outstanding 6,123,782 0
Common stock, par value (in usd per share) $ 0.01 $ 0.01
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares, outstanding 240,655,607 222,749,220