The capitalized costs incurred (excluded from amortization), as of the date of the balance sheet, in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells and extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery.

No definition available.

OIL AND NATURAL GAS PROPERTIES (Details) $ in Thousands				3 Months Ended				9 Months Ended		12 Months Ended
OIL AND NATURAL GAS PROPERTIES (Details) $ in Thousands	Oct. 01, 2019 USD ($)	Jul. 10, 2017 USD ($)	Jan. 24, 2017 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Oct. 01, 2019 USD ($)	Sep. 30, 2019	Dec. 31, 2019 USD ($) $ / MMBTU $ / bbl	Dec. 31, 2018 USD ($) $ / MMBTU $ / bbl	Dec. 31, 2017 USD ($) $ / MMBTU $ / bbl	Oct. 02, 2019 USD ($)
Oil and Natural Gas Properties
Subject to depletion	$ 2,155,288			$ 420,609				$ 2,155,288		$ 420,609	$ 1,470,509		$ 380,364
Not subject to depletion:
Exploration and extension wells in progress											23,536
Other capital costs:
Incurred in 2019				105,009						105,009
Incurred in 2018											310,113
Incurred in 2017											638,269
Total not subject to depletion	438,365			105,009				438,365		105,009	971,918		108,954
Gross oil and natural gas properties	2,593,653			525,618				2,593,653		525,618	2,442,427		489,318
Less accumulated depletion	(1,709,719)			(19,474)				(1,709,719)		(19,474)	(639,951)
Net oil and natural gas properties	883,934			$ 506,144				883,934		$ 506,144	$ 1,802,476		$ 489,318
Ceiling Limitation Disclosures
Oil And Natural Gas, Evaluated Properties, Fair Value Disclosure	380,400							380,400
Oil And Natural Gas, Unevaluated Properties, Fair Value Disclosure	$ 109,000							109,000
First day average of the (WTI) crude oil spot price (in dollars per barrel) \| $ / bbl										55.85	65.56	51.34
First day average of the Henry Hub natural gas price (in dollars per Mmbtu) \| $ / MMBTU										2.578	3.100	2.976
Amount of unevaluated property costs transferred to the full cost pool							$ 51,000
Gain (loss) from sale of other operating property and equipment											$ (7,235)	$ 721,573
Impairment of Oil and Gas Properties					$ 45,600	$ 664,400	$ 275,200	$ 985,190
Financial Designation, Predecessor and Successor [Fixed List]	Predecessor			Successor				Predecessor	Predecessor		Predecessor	Predecessor
Williston Basin Assets
Ceiling Limitation Disclosures
Gain (loss) from sale of other operating property and equipment		$ 0									$ (7,200)	$ 485,900
El Halcon Assets
Ceiling Limitation Disclosures
Gain (loss) from sale of other operating property and equipment			$ 0									$ 235,700
Utica areas \| Unevaluated Oil and Gas Leaseholds
Ceiling Limitation Disclosures
Amount of unevaluated property costs transferred to the full cost pool						$ 481,700