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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Standardized Measure of Discounted Future Cash Flows (Unaudited) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Extractive Industries [Abstract] |  |  |  |
Future cash inflows from production | $ 1,204,568 | $ 2,795,762 | $ 1,579,734 |
Future production costs (1) | (627,715) | (1,131,145) | (735,904) |
Future development costs | (39,288) | (36,730) | (66,732) |
Future income tax expenses | 0 | (17,780) | 0 |
Undiscounted future net cash flows | 537,565 | 1,610,107 | 777,098 |
10% annual discount | (241,272) | (803,242) | (344,184) |
Standardized measure of discounted future net cash flows | $ 296,293 | $ 806,865 | $ 432,914 | $ 104,986

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- Definition Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Form 20-F -Section Item 18 -Subsection Instruction 2 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482245/932-235-55-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 33 -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-33 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Subparagraph (a) -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-31 + Details
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