Goodwill and Intangible Assets - Narrative (Details)	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill recognized in fresh start accounting		$ 2,675,000
Number of reporting units | Segment			1
Royalty rate (as a percent)			0.10%
Amortization expense	$ 0
Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	$ 5,500,000		$ 5,500,000
Royalty rate (as a percent)			0.10%
Predecessor | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 4,088,000		$ 6,126,000
Predecessor | Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization				$ 0