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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
	Dec. 31, 2022 MMBbls MMcf	Dec. 31, 2021 MMBbls MMcf	Dec. 31, 2020 MMBbls MMcf	Dec. 31, 2019 MMBbls MMcf
Oil (MBbls)
Proved Reserves:
Beginning of period	627	11,000	16,747
Revisions of previous estimates	(61)	145	(4,241)
Extensions and discoveries	137	0	2
Acquisitions of minerals in place	6	0	0
Sales of minerals in place	(78)	(9,308)	0
Production	(82)	(1,210)	(1,508)
End of period	549	627	11,000
Proved Developed Reserves:
Proved developed reserves	480	627	11,000	15,104
Proved Undeveloped Reserves:
Proved undeveloped reserves	69	0	0	1,643
Natural Gas (MMcf)
Proved Reserves:
Beginning of period | MMcf	6,118,083	5,562,876	5,341,497
Revisions of previous estimates | MMcf	(6,870)	88,546	306,552
Extensions and discoveries | MMcf	1,090,420	797,198	365,663
Acquisitions of minerals in place	260	202,588	0
Sales of minerals in place | MMcf	(3,707)	(43,851)	0
Production | MMcf	(500,616)	(489,274)	(450,836)
End of period | MMcf	6,697,570	6,118,083	5,562,876
Proved Developed Reserves:
Proved developed reserves | MMcf	2,531,462	2,245,660	1,967,288	1,890,357
Proved Undeveloped Reserves:
Proved undeveloped reserves | MMcf	4,166,108	3,872,423	3,595,588	3,451,140

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Proved developed reserves.

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Proved undeveloped reserves.

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Proved undeveloped reserves abstract.

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e61797-109447

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447

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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 https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447

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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 5
-Subparagraph (f)
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