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Oil and Gas Reserves Information (Unaudited) - Summary of Changes in Net Quantities of Crude Oil and Natural Gas Reserves (Detail) | 12 Months Ended |
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Dec. 31, 2021 MMcf MMBbls | Dec. 31, 2020 MMBbls MMcf | Dec. 31, 2019 MMcf MMBbls | Dec. 31, 2018 MMcf MMBbls
Oil (MBbls) |  |  |  |
Proved Reserves: |  |  |  |
Beginning of period | 11,000 | 16,747 | 23,612 |
Revisions of previous estimates | 145 | (4,241) | (4,621) |
Extensions and discoveries | 0 | 2 | 259 |
Acquisitions of minerals in place | 0 | 0 | 240 |
Sales of minerals in place | (9,308) | 0 | (58) |
Production | (1,210) | (1,508) | (2,685) |
End of period | 627 | 11,000 | 16,747 |
Proved Developed Reserves: |  |  |  |
Proved developed reserves | 627 | 11,000 | 15,104 | 21,466
Proved Undeveloped Reserves: |  |  |  |
Proved undeveloped reserves | 0 | 0 | 1,643 | 2,146
Natural Gas (MMcf) |  |  |  |
Proved Reserves: |  |  |  |
Beginning of period | MMcf | 5,562,876 | 5,341,497 | 2,282,758 |
Revisions of previous estimates | MMcf | 88,546 | 306,552 | 62,697 |
Extensions and discoveries | MMcf | 797,198 | 365,663 | 315,286 |
Acquisitions of minerals in place | 202,588 | 0 | 3,023,109 |
Sales of minerals in place | MMcf | (43,851) | 0 | (49,520) |
Production | MMcf | (489,274) | (450,836) | (292,833) |
End of period | MMcf | 6,118,083 | 5,562,876 | 5,341,497 |
Proved Developed Reserves: |  |  |  |
Proved developed reserves | MMcf | 2,245,660 | 1,967,288 | 1,890,357 | 583,107
Proved Undeveloped Reserves: |  |  |  |
Proved undeveloped reserves | MMcf | 3,872,423 | 3,595,588 | 3,451,140 | 1,699,651

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- Definition Proved developed reserves abstract. + References No definition available. + Details
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- Definition Proved reserves abstract. + References No definition available. + Details
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- Definition Proved undeveloped reserves. + References No definition available. + Details
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- Definition Proved undeveloped reserves abstract. + References No definition available. + Details
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- Definition Additions to proved reserves 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 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 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61831-109447 + Details
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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + 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 4 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61797-109447 + Details
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- Definition Production of proved reserves. + 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 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61831-109447 + Details
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- Definition Purchase 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 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61831-109447 + Details
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- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + 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 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61831-109447 + Details
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