Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands		3 Months Ended								9 Months Ended	12 Months Ended
	Oct. 10, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Oct. 10, 2016	Dec. 31, 2015	Dec. 31, 2014
Successor
Income Tax [Line Items]
Income tax (benefit) expense at the federal statutory rate		$ (3,145)
State income taxes - net of federal income tax benefits		0
Excess depletion		0
Noncontrolling interest in partnership		273
Nondeductible expenses		4
Change in valuation allowance		2,868
Income tax benefit (expense)		$ 0
Predecessor
Income Tax [Line Items]
Income tax (benefit) expense at the federal statutory rate										$ 0	$ 0	$ 0
State income taxes - net of federal income tax benefits										406	572	(1,524)
Excess depletion										0	0	0
Noncontrolling interest in partnership										0	0	0
Nondeductible expenses										0	0	0
Change in valuation allowance										0	0	0
Income tax benefit (expense)	$ 0		$ 0	$ (406)	$ 0	$ (572)	$ 0	$ 0	$ 0	$ 406	$ 572	$ (1,524)