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DISCLOSURES ABOUT OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) - Change in Quantities of Proved Oil, Natural Gas Liquids, and Natural Gas Reserves (Details) bbl in Thousands, Mcf in Thousands, MBoe in Millions, Boe in Millions | 12 Months Ended
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Dec. 31, 2022 Boe $ / bbl $ / MMBTU Mcf bbl | Dec. 31, 2021 Boe $ / MMBTU $ / bbl bbl Mcf | Dec. 31, 2020 Boe MBoe $ / MMBTU $ / bbl bbl Mcf | Dec. 31, 2019 MBoe $ / MMBTU $ / bbl Mcf bbl
Proved reserves demoted to non-proved |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe | (0.2) | (24.1) | (22.9) |
Proved developed and undeveloped reserve, drilling program, term | 5 years |  |  |
Wattenberg Field, Rocky Mountain Region |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe | 25.4 | (20.0) | 7.5 |
Wattenberg Field, Rocky Mountain Region | Price-Related Revisions |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe | 11.8 |  |  |
Wattenberg Field, Rocky Mountain Region | Well Performance Forecasts and NGL Yields |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe | 13.6 |  |  |
Wattenberg Field, Rocky Mountain Region | Changes in Well Operating Cost Methodology |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe |  | (13.1) |  |
Wattenberg Field, Rocky Mountain Region | Engineering Revisions |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe |  | (6.9) | 12.3 |
Revisions to previous estimates - increase (decrease) | MBoe |  |  | 7.1 | (4.8)
Wattenberg Field, Rocky Mountain Region | Fuel, Gas, Interest, and Other Negative Revisions |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Proved developed and undeveloped reserve, revision upward (reduction) of previous estimate (energy) | Boe |  | (7.1) |  |
Horizontal development | Wattenberg Field, Rocky Mountain Region |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Extensions, discoveries, and other additions | Boe | 27.9 | 0.0 | 18.0 |
Oil contracts |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Balance at the beginning of the period | 143,579 | 52,793 | 64,413 |
Extensions, discoveries and other additions | 12,408 | 19 | 9,376 |
Production | (27,651) | (4,523) | (5,019) |
Removed from capital program | (105) | (12,249) | (14,120) |
Purchases of minerals in place | 17,479 | 114,379 | 1,430 |
Revisions to previous estimates | 6,892 | (6,840) | (3,287) |
Balance at the end of the period | 152,602 | 143,579 | 52,793 | 64,413
Proved developed reserves | 117,768 | 104,078 | 24,320 |
Proved undeveloped reserves | 34,834 | 39,501 | 28,473 |
Oil contracts | Wattenberg Field, Rocky Mountain Region |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Oil and gas commodity, price increase (in dollars per share) | $ / bbl | 27.11 |  |  |
Oil and gas commodity price (in dollars per share) | $ / bbl | 93.67 | 66.56 | 39.57 | 55.85
Gas contracts |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Balance at the beginning of the period | Mcf | 888,499 | 235,728 | 212,200 |
Extensions, discoveries and other additions | Mcf | 51,358 | 103 | 32,172 |
Production | Mcf | (112,478) | (13,852) | (14,166) |
Removed from capital program | Mcf | (459) | (43,918) | (33,886) |
Purchases of minerals in place | Mcf | 31,872 | 767,504 | 5,457 |
Revisions to previous estimates | Mcf | 8,708 | (57,066) | 33,951 |
Balance at the end of the period | Mcf | 867,500 | 888,499 | 235,728 | 212,200
Proved developed reserves | Mcf | 750,793 | 748,762 | 123,220 |
Proved undeveloped reserves | Mcf | 116,707 | 139,737 | 112,508 |
Gas contracts | Wattenberg Field, Rocky Mountain Region |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Oil and gas commodity, price increase (in dollars per share) | $ / MMBTU | 2.76 |  |  |
Oil and gas commodity price (in dollars per share) | $ / MMBTU | 6.36 | 3.60 | 1.99 | 2.58
Natural gas liquids (per Bbl) |  |  |  |
Changes in quantities of proved oil, natural gas liquids and natural gas reserves |  |  |  |
Balance at the beginning of the period | 106,028 | 26,111 | 22,161 |
Extensions, discoveries and other additions | 6,936 | 0 | 3,269 |
Production | (15,666) | (1,763) | (1,858) |
Removed from capital program | (46) | (4,485) | (3,141) |
Purchases of minerals in place | 4,478 | 89,797 | 570 |
Revisions to previous estimates | 17,104 | (3,632) | 5,110 |
Balance at the end of the period | 118,834 | 106,028 | 26,111 | 22,161
Proved developed reserves | 102,004 | 88,967 | 14,315 |
Proved undeveloped reserves | 16,830 | 17,061 | 11,796 |

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- Definition Additions to proved reserves, measured in energy equivalents, that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References No definition available. + Details
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- Definition Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447 + Details
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