Income Taxes - Reconciliation Between Federal Statutory Rate and Income (Benefit) Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Statutory federal income tax	$ (34,423)
Meals and entertainment	706
State taxes, net of federal benefit	(1,662)
Valuation allowance	(54,418)
Remeasurement of Federal Deferred Taxes	87,227
Cancellation of debt income	0
Bankruptcy transaction costs	0
Tax basis adjustments	(862)
Goodwill impairment	0
Changes in estimates and other	1,754
Total income tax expense (benefit)	$ (1,678)
Predecessor
Income Tax Contingency [Line Items]
Statutory federal income tax		$ (44,540)	$ (130,576)
Meals and entertainment		522	684
State taxes, net of federal benefit		(6,778)	(3,698)
Valuation allowance		188,970	0
Remeasurement of Federal Deferred Taxes		0	0
Cancellation of debt income		(178,017)	0
Bankruptcy transaction costs		9,783	0
Tax basis adjustments		17,981	0
Goodwill impairment		0	2,833
Changes in estimates and other		8,196	(573)
Total income tax expense (benefit)		$ (3,883)	$ (131,330)