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DERIVATIVE AND HEDGING ACTIVITIES - Open Contracts (Details)		3 Months Ended	9 Months Ended		12 Months Ended
	Oct. 01, 2019	Dec. 31, 2019	Oct. 01, 2019	Sep. 30, 2019	Dec. 31, 2020 MMBTU $ / MMBTU $ / bbl bbl	Dec. 31, 2019	Dec. 31, 2018
Derivative and hedging activities
Financial Designation, Predecessor and Successor [Fixed List]	Predecessor	Successor	Predecessor	Predecessor	Successor	Successor	Predecessor
January 2021 - December 2021 | Fixed Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					3,076,979,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					44.98
January 2021 - December 2021 | Fixed Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					4,657,871
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					2.74
January 2021 - December 2021 | Basis Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					3,235,500,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					(0.07)
January 2021 - December 2021 | Basis Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					4,657,871
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					(0.24)
January 2021 - December 2021 | WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					2,941,000,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					(0.31)
January 2022 - December 2022 | Fixed Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					1,659,434,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					46.58
January 2022 - December 2022 | Fixed Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					1,297,420
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					3.01
January 2022 - December 2022 | Basis Swap | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					1,659,434,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					0.44
January 2022 - December 2022 | Basis Swap | Natural gas
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					3,686,044
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					(0.30)
January 2022 - December 2022 | WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Volume in Bbl's | bbl					1,843,434,000
Weighted Average Price (in dollars per Mmbtu's/Bbl's) | $ / bbl					(0.07)
January 2022 - December 2022 | Collars | Natural gas | Minimum
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					2,388,624
Floor (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					2.50
January 2022 - December 2022 | Collars | Natural gas | Maximum
Derivative and hedging activities
Volume in Mmbtu's | MMBTU					2,388,624
Ceilings (in dollars per Mmbtu's/Bbl's) | $ / MMBTU					2.65

X

- Definition

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+ References

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- Definition

The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

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- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal volume used to calculate payments on a derivative instrument.

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Average fixed price related to the group of price risk swap derivatives.

+ References

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- Definition

Indicates designation of financial information when substantially all business or separately identifiable line of business transfers from one entity to another entity. Acceptable values are "Predecessor" and "Successor".

+ 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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