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DERIVATIVE INSTRUMENTS (Gain and Loss on Derivative Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 4 Months Ended | 5 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | May 17, 2021 | Sep. 30, 2020
Derivative [Line Items] |  |  |  |  |
Net (loss) gain on derivative instruments | $ (622,476) | $ (53,823) | $ (762,134) | $ (137,239) | $ 71,414
Total losses on natural gas derivatives |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Fair value (losses) gains | (517,799) | (84,390) | (638,063) | (123,080) | (147,661)
Settlement (losses) gains | (82,566) | 31,742 | (89,255) | (3,362) | 176,555
Net (loss) gain on derivative instruments | (600,365) | (52,648) | (727,318) | (126,442) | 28,894
Total losses on oil and condensate derivatives |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Fair value (losses) gains | (1,590) | 723 | (6,947) | (6,126) | (4,289)
Settlement (losses) gains | (4,336) | (1,505) | (4,336) | 0 | 48,444
Net (loss) gain on derivative instruments | (5,926) | (782) | (11,283) | (6,126) | 44,155
Total losses on NGL derivatives |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Fair value (losses) gains | (10,201) | (288) | (17,549) | (4,671) | (620)
Settlement (losses) gains | (5,984) | (105) | (5,984) | 0 | 366
Net (loss) gain on derivative instruments | $ (16,185) | $ (393) | (23,533) | (4,671) | (254)
Contingent consideration arrangement - fair value losses |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Net (loss) gain on derivative instruments |  |  | $ 0 | $ 0 | $ (1,381)

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- Definition Gain (Loss) On Derivative Instruments, Fair Value, Net + References No definition available. + Details
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- Definition Gain (Loss) On Derivative Instruments, Settlements, Net + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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