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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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