IMPAIRMENT OF ASSETS (Tables)

12 Months Ended

Dec. 31, 2019

Other Income and Expenses [Abstract]

Impairment Expense

	Successor				Predecessor
(in thousands)	Year Ended December 31, 2019		February 9, 2018 Through December 31, 2018		January 1, 2018 Through February 8, 2018
Upstream
Impairment of unproved properties	$	31,023	$	742,065	$	—
Impairment of proved properties	484,830		1,291,647		—
Impairment of operating lease right-of-use assets	13,245		—		—
Impairment of other long-term assets	27,329		—		—
Total Upstream impairment of assets	556,427		2,033,712		—
Midstream
Impairment of Cimarron investment	—		15,963		—
Impairment of property and equipment	348,597		68,407		—
Impairment of operating lease right-of-use assets	269		—		—
Impairment of intangible assets	—		394,999		—
Impairment of goodwill	—		691,970		—
Total Midstream impairment of assets	348,866		1,171,339		—
Total impairment of assets	$	905,293	$	3,205,051	$	—