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DERIVATIVE AND HEDGING ACTIVITIES - Open Contracts (Details)	1 Months Ended	2 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Dec. 31, 2019	Sep. 30, 2020 MMBTU $ / MMBTU $ / bbl bbl	Sep. 30, 2019	Sep. 30, 2020 MMBTU $ / MMBTU $ / bbl bbl	Sep. 30, 2019
Derivative and hedging activities
Financial Designation, Predecessor and Successor [Fixed List]	Successor	Successor	Successor	Predecessor	Successor	Predecessor
2020 [Member] | Fixed Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU			736,000		736,000
2020 [Member] | Fixed Swap | Natural gas | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / MMBTU			2.56		2.56
2020 [Member] | Basis Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			782,000		782,000
2020 [Member] | Basis Swap | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			0.26		0.26
2020 [Member] | WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			518,500		518,500
2020 [Member] | WTI NYMEX Roll | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			0.17		0.17
2020 [Member] | Producer Collar Ceiling [Member] | Crude oil | Maximum
Derivative and hedging activities
Volume in Bbl's | bbl			414,000		414,000
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			49.02		49.02
2020 [Member] | Producer Collar Floor [Member] | Crude oil | Minimum
Derivative and hedging activities
Volume in Bbl's | bbl			414,000		414,000
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			42.10		42.10
2020 [Member] | Call option | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			726,800		726,800
2020 [Member] | Call option | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			70.00		70.00
2020 [Member] | Put options | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			368,000		368,000
2020 [Member] | Put options | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			42.10		42.10
2021 [Member] | Fixed Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			2,554,000		2,554,000
2021 [Member] | Fixed Swap | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			45.98		45.98
2021 [Member] | Fixed Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU			2,190,000		2,190,000
2021 [Member] | Fixed Swap | Natural gas | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / MMBTU			2.47		2.47
2021 [Member] | Basis Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			2,554,000		2,554,000
2021 [Member] | Basis Swap | Crude oil | Weighted Average
Derivative and hedging activities
Floor (in dollars per Mmbtu's/Bbl's) | $ / bbl			(0.11)		(0.11)
2021 [Member] | WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			2,554,000		2,554,000
2021 [Member] | WTI NYMEX Roll | Crude oil | Weighted Average
Derivative and hedging activities
Floor (in dollars per Mmbtu's/Bbl's) | $ / bbl			(0.29)		(0.29)
2022 [Member] | Fixed Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			724,000		724,000
2022 [Member] | Fixed Swap | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			51.50		51.50
2022 [Member] | Basis Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			724,000		724,000
2022 [Member] | Basis Swap | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			0.88		0.88
2022 [Member] | WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl			1,276,000		1,276,000
2022 [Member] | WTI NYMEX Roll | Crude oil | Weighted Average
Derivative and hedging activities
Floors (in dollars per Mmbtu's/Bbl's) | $ / bbl			0.00		0.00

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- Definition

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+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=116635682&loc=SL2890601-112764

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