Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Schedule of the Computation of Historical Basic and Diluted Net Loss Per Share (Details)

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Net Loss Per Common Share - Schedule of the Computation of Historical Basic and Diluted Net Loss Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator        
Net loss $ (63,666) $ (66,243) $ (287,353) $ (473,646)
Less: Stock dividend payable and transaction costs 7,585 18,319 22,421 32,847
Net loss available to common stockholders $ (71,251) $ (84,562) $ (309,774) $ (506,493)
Denominator        
Weighted-average basic and diluted common shares 268,058 245,810 260,327 241,579
Net loss per common share, basic and diluted (in dollars per share) $ (0.27) $ (0.34) $ (1.19) $ (2.10)