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INCOME TAXES (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Oct. 01, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 08, 2020
Deferred: |  |  |  |  |  |  |  |  |
Federal |  |  |  | $ 95,791 |  |  |  | $ (95,791) |
Total deferred income tax benefit (provision) |  |  |  | 95,791 |  |  |  | (95,791) |
Total income tax benefit (provision) |  | $ (95,800) |  | 95,791 |  | $ 0 |  | $ (95,791) |
Differences between the actual income tax benefit (provision) and the expected income tax benefit (provision) |  |  |  |  |  |  |  |  |
Federal statutory rate (as a percent) | 21.00% |  | 21.00% |  | 21.00% | 21.00% |  | 21.00% |
Expected tax benefit (provision) |  |  | $ 2,196 | 262,888 |  | $ 48,238 |  | $ (29,767) |
Stock-based compensation |  |  |  | (6,093) |  |  |  | (350) |
Capital loss |  |  |  | (271,248) |  |  |  |  |
Increase (reduction) in deferred tax asset |  |  |  | (9,287) |  |  |  | (201,903) |
Change in valuation allowance and related items |  |  | (1,506) | (186,851) |  | (10,849) |  | 136,432 |
Attribute reduction |  |  |  | (229,385) |  | (37,985) |  |  |
Permanent adjustments |  |  | (690) | (7,241) |  | 577 |  | (203) |
Other |  |  |  | 512 |  | 19 |  |  |
Total income tax benefit (provision) |  | $ (95,800) |  | $ 95,791 |  | 0 |  | $ (95,791) |
Deferred noncurrent income tax assets: |  |  |  |  |  |  |  |  |
Net operating loss carry-forwards |  |  | 46,382 |  |  | 94,742 | $ 46,382 |  |
Net operating loss limitation under IRC Section 382 |  |  |  |  |  | 451,000 |  |  |
Built in loss adjustment Section 382 |  |  | 142,285 |  |  | 98,416 | 142,285 |  |
Capital loss carryforward |  |  | 74,848 |  |  | 74,848 | 74,848 |  |
Stock-based compensation expense |  |  |  |  |  | 1,448 |  |  |
Asset retirement obligations |  |  | 2,224 |  |  | 2,347 | 2,224 |  |
Book-tax differences in property basis |  |  | 200,478 |  |  | 199,170 | 200,478 |  |
Unrealized hedging transactions |  |  | 1,618 |  |  | 2,908 | 1,618 |  |
Disallowed interest Section 163(j) |  |  | 7,722 |  |  | 13,579 | 7,722 |  |
Basis difference in debt |  |  | 2,142 |  |  | 1,687 | 2,142 |  |
Operating lease liability |  |  | 666 |  |  | 85 | 666 |  |
Other |  |  | 991 |  |  | 374 | 991 |  |
Gross deferred noncurrent income tax assets |  |  | 479,356 |  |  | 489,604 | 479,356 |  |
Valuation allowance |  |  | (478,690) |  |  | (489,539) | (478,690) |  |
Deferred noncurrent income tax assets |  |  | 666 |  |  | 65 | 666 |  |
Deferred noncurrent income tax liabilities: |  |  |  |  |  |  |  |  |
Lease right of use |  |  | (666) |  |  | (65) | (666) |  |
Deferred noncurrent income tax liabilities |  |  | 666 |  |  | 65 | 666 |  |
Net noncurrent deferred income tax assets (liabilities) |  |  | $ 0 |  |  | $ 0 | $ 0 |  |
Market value of equity upon emergence from bankruptcy |  |  |  |  |  |  |  |  | $ 524,800
Financial Designation, Predecessor and Successor [Fixed List] | Predecessor |  | Successor | Predecessor | Predecessor | Successor | Successor | Predecessor |

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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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