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DISCLOSURES ABOUT OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) - Discounted Future Net Cash Flows Relating to Proved Oil and Natural Gas Reserves (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Results of Operations, Revenue from Oil and Gas Producing Activities [Abstract] |  |  |
Future net cash flow discount rate | 10.00% |  |
Standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves |  |  |
Future cash flows | $ 14,401,814 | $ 2,230,012 | $ 3,827,009
Future production costs | (5,054,695) | (675,755) | (1,029,140)
Future development costs | (1,107,576) | (530,970) | (850,327)
Future income tax expense | (1,465,949) | 0 | 0
Future net cash flows | 6,773,594 | 1,023,287 | 1,947,542
10% annual discount for estimated timing of cash flows | (2,361,490) | (586,233) | (1,089,395)
Standardized measure of discounted future net cash flows | 4,412,104 | 437,054 | 858,147
Changes in the standardized measure of discounted future net cash flows relating to proved oil and natural gas reserves |  |  |
Beginning of period | 437,054 | 858,147 | 954,980
Sale of oil and gas produced, net of production costs | (773,711) | (160,466) | (233,677)
Net changes in prices and production costs | 874,155 | (641,137) | (372,233)
Net changes in extensions, discoveries and improved recoveries | 855 | (54,269) | 45,728
Development costs incurred | 108,113 | 42,325 | 185,086
Changes in estimated development cost | 106,788 | 220,964 | 81,358
Purchases of minerals in place | 4,484,125 | 12,372 | 10,135
Sales of minerals in place | 0 | 0 | (309)
Revisions of previous quantity estimates | (84,126) | 60,754 | 79,637
Net change in income taxes | (915,053) | 0 | 0
Accretion of discount | 43,705 | 85,815 | 95,498
Changes in production rates and other | 130,199 | 12,549 | 11,944
End of period | $ 4,412,104 | $ 437,054 | $ 858,147

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- Definition Amount of decrease in standardized measure of discounted future net cash flow as a result of sales of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35A -URI http://asc.fasb.org/extlink&oid=123377692&loc=SL6807758-109447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63123-109448 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e62500-109447 + Details
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration