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LONG-TERM DEBT - NARRATIVE (Details) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 01, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2020 | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Aug. 09, 2021 USD ($) | Jul. 20, 2021 USD ($) | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  | $ 3,800,000 | $ 1,400,000 | $ 4,300,000 | $ 2,600,000 |  |  |
Capitalized interest expense |  |  |  | 600,000 | $ 400,000 | 600,000 | $ 1,400,000 |  |  |
Amended Credit Agreement | Revolver |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowing base | $ 500,000,000.0 |  |  |  |  |  |  |  |  |
Elected commitments | 400,000,000.0 |  |  |  |  |  |  |  |  |
Amended Credit Agreement | Revolver | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Borrowing base |  |  |  |  |  |  |  |  | $ 500,000,000.0 |
Elected commitments |  |  |  |  |  |  |  |  | $ 400,000,000.0 |
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 | 500,000,000.0 | $ 260,000,000.0 |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 1,000,000,000.0 | $ 750,000,000.0 |  |  |  |  |  |  |  |
Maximum net leverage ratio | 3.0 | 3.50 |  |  |  |  |  |  |  |
Minimum current ratio covenant | 1.00 |  |  |  |  |  |  |  |  |
Credit facility outstanding |  |  |  | 99,000,000.0 |  | 99,000,000.0 |  |  |  | $ 0
Deferred financing costs | $ 3,700,000 |  |  |  |  |  |  |  |  |
Amended Credit Agreement | HighPoint Merger | Revolver | Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  | 2,500,000 |  | 2,500,000 |  |  |  | 700,000
Amended Credit Agreement | HighPoint Merger | Revolver | Prepaid Expenses and Other |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  | $ 1,700,000 |  | $ 1,700,000 |  |  |  | $ 400,000
Amended Credit Agreement | HighPoint Merger | Revolver | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Credit facility outstanding |  |  |  |  |  |  |  | $ 85,000,000.0 |  |
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% |  |  |  |  |  |  |  |
Senior Notes | Senior Notes Due 2026 | HighPoint Merger |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 100,000,000 |  |  |  |  |  |  |  |  |
Interest rate | 7.50% |  |  |  |  |  |  |  |  |

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