CONCENTRATIONS (Tables)

12 Months Ended

Dec. 31, 2017

Risks and Uncertainties [Abstract]

Customers from Whom We Derived 10% or More of Total Oil and Gas Revenue

The following table identifies customers from whom we derived 10% or more of our total oil and natural gas revenue during the indicated periods:

	Successor		Predecessor
	Period from March 1, 2017 through December 31, 2017		Period from January 1, 2017 through February 28, 2017		Year Ended December 31,
					2016		2015
Phillips 66 Company	74	%	56	%	68	%	53	%
Shell Trading (US) Company	15	%	7	%	10	%	13	%
Williams Ohio Valley Midstream LLC	—	%	12	%	2	%	9	%
Conoco	—	%	11	%	5	%	2	%