Commitments and Contingencies (Details Textual) - USD ($) $ in Millions		4 Months Ended	12 Months Ended
	Dec. 31, 2016	Apr. 22, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Obligations (Textual)
Operating Leases, Future Minimum Payments Due	$ 1.9		$ 1.9
Operating lease commitments [Member]
Obligations (Textual)
Operating Leases, Future Minimum Payments Due	8.8		8.8
Operating Leases, Future Minimum Payments Due, Next Twelve Months	5.5		5.5
Operating Leases, Future Minimum Payments, Due in Two Years	2.0		2.0
Operating Leases, Future Minimum Payments, Due in Three Years	0.6		0.6
Operating Leases, Future Minimum Payments, Due in Four Years	0.5		0.5
Operating Leases, Future Minimum Payments, Due in Five Years	0.2		0.2
Gas transportation and processing obligations [Member]
Obligations (Textual)
Operating Leases, Future Minimum Payments Due	45.4		45.4
Operating Leases, Future Minimum Payments Due, Next Twelve Months	8.3		8.3
Operating Leases, Future Minimum Payments, Due in Two Years	13.5		13.5
Operating Leases, Future Minimum Payments, Due in Three Years	12.8		12.8
Operating Leases, Future Minimum Payments, Due in Four Years	$ 10.8		10.8
Building [Member]
Obligations (Textual)
Building Sub-lease term	4 years
Successor [Member]
Obligations (Textual)
Operating Leases, Rent Expense			$ 5.7
Predecessor [Member]
Obligations (Textual)
Operating Leases, Rent Expense		$ 4.5		$ 16.8	$ 21.0