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Summarized Condensed Consolidating Information - Condensed Consolidating Balance Sheets Share Data (Details) - $ / shares
Sep. 30, 2019
Apr. 15, 2019
Dec. 31, 2018
Summarized Condensed Consolidating Information [Abstract]      
Common stock, par value (in usd per share) $ 0.01 $ 0.01 $ 0.01
Common stock, authorized (shares) 500,000,000   500,000,000
Common stock, issued (shares) 95,103,270   85,867,044
Common stock, outstanding (shares) 95,103,270   85,867,044