Debt - Components of Interest Expense (Details) - USD ($)	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt
Total interest expense	$ 19,270,340
Predecessor
Debt
Amortization of deferred financing costs		$ 2,800,000	$ 4,000,000	$ 5,400,000
Capitalized interest		(1,100,000)	(1,000,000)	(6,000,000)
Total interest expense		$ 51,700,000.0	$ 78,200,000	$ 79,100,000