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FRESH START ACCOUNTING (Reorganization Adjustment to Liabilities Subject to Compromise and Gain on Liabilities Subject to Compromise) (Details) - USD ($) $ in Thousands | 5 Months Ended |  |
--- | --- | --- | ---
May 17, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | $ 2,224,449 | $ 0 | $ 2,293,480
General Unsecured Claims settled via Class 4A, 4B, and 5B distributions |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 74,098 |  |
Predecessor Senior Notes and associated interest |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 1,842,035 |  |
Pre-Petition Revolving Credit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 197,500 |  |
Reinstatement of Predecessor Claims as Successor liabilities |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 45,475 |  |
Reinstatement of Predecessor asset retirement obligations |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 65,341 |  |
Reorganization Adjustments |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | (2,224,449) |  |
Pre-petition General Unsecured Claims Settled at Emergence | 74,098 |  |
Predecessor Senior Notes Claims settled at Emergence | 1,842,035 |  |
Pre-Petition Revolving Credit Facility | 197,500 |  |
Rollover of Pre-Petition Revolving Credit Facility into Exit RBL Facility | (197,500) |  |
Accrued payable for claims to be settled via Unsecured Claims Distribution Trust | (1,000) |  |
Accrued payable for claims to be settled via Convenience Claims Cash Pool | (3,000) |  |
Accrued payable for claims to be settled via Parent Cash Pool | (10,000) |  |
Accrued payable for shares to be transferred to trust | (54,109) |  |
Issuance of New Common Stock to settle Predecessor liabilities | (639,666) |  |
Issuance of Successor Senior Notes in settlement of Class 4B and 5B claims | (550,000) |  |
Gain on settlement of liabilities subject to compromise | $ 658,358 |  |

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