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LONG-TERM DEBT - NARRATIVE (Details) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 01, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2020 | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Oct. 28, 2021 USD ($) | Jul. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  | $ 3,700,000 | $ 700,000 | $ 7,900,000 | $ 3,300,000 |  |  |
Capitalized interest expense |  |  |  | 600,000 | $ 300,000 | 1,200,000 | $ 1,700,000 |  |  |
Amended Credit Agreement | Revolver |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowing base | $ 500,000,000 |  |  |  |  |  |  |  | $ 500,000,000 |
Elected commitments | 400,000,000 |  |  |  |  |  |  |  | $ 400,000,000 |
Amended Credit Agreement | Revolver | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 0.00% |  |  |  |  |  |  |
Amended Credit Agreement | Revolver | Minimum | Eurodollar |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 2.00% |  |  |  |  |  |  |
Amended Credit Agreement | Revolver | Minimum | Reference Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 1.00% |  |  |  |  |  |  |
Amended Credit Agreement | Revolver | Maximum | Eurodollar |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 3.00% |  |  |  |  |  |  |
Amended Credit Agreement | Revolver | Maximum | Reference Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 2.00% |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowing base | $ 500,000,000 | $ 260,000,000 |  |  |  |  |  |  |  |
Minimum current ratio covenant | 1.00 |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 1,000,000,000 | $ 750,000,000 |  |  |  |  |  |  |  |
Maximum net leverage ratio | 3.0 | 3.50 |  |  |  |  |  |  |  |
Credit facility outstanding |  |  |  | 60,000,000 |  | 60,000,000 |  |  |  | $ 0
Deferred financing costs | $ 3,900,000 |  |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver | Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  | 2,200,000 |  | 2,200,000 |  |  |  | 700,000
Amended Credit Agreement | HighPoint Merger | Revolver | Prepaid Expenses and Other |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  | $ 1,800,000 |  | $ 1,800,000 |  |  |  | $ 400,000
Amended Credit Agreement | HighPoint Merger | Revolver | Eurodollar |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread | 4.00% | 3.00% |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver | Reference Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread | 3.00% | 2.00% |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread | 0.50% | 0.00% |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver | Minimum | Base Rate |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread | 1.50% | 0.00% |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Subsequent Event | Revolver |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Credit facility outstanding |  |  |  |  |  |  |  | $ 0 |  |
Senior Notes | Senior Notes Due 2026, 7.50% | HighPoint Merger |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 100,000,000 |  |  |  |  |  |  |  |  |
Interest rate | 7.50% |  |  |  |  |  |  |  |  |
Senior Notes | Senior Notes Due 2026, 7.50% | HighPoint Merger | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Redemption price, percentage | 107.50% |  |  |  |  |  |  |  |  |
Senior Notes | Senior Notes Due 2026, 7.50% | HighPoint Merger | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Redemption price, percentage | 100.00% |  |  |  |  |  |  |  |  |

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