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Supplemental Gas Data (unaudited) - Change in Standardized Measure of Discounted Future Net Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 10,762,699 | $ 5,881,576 | $ 2,635,736
Net Changes in Sales Prices and Production Costs | (10,722,238) | 6,774,652 | 5,272,386
Sales Net of Production Costs | (992,030) | (1,358,052) | (1,220,971)
Net Change Due to Revisions in Quantity Estimates | (155,807) | (472,831) | (334,660)
Net Change Due to Extensions, Discoveries and Improved Recovery | 32,876 | 1,853,496 | 699,710
Development Costs Incurred During the Period | 637,711 | 526,092 | 393,641
Difference in Previously Estimated Development Costs Compared to Actual Costs Incurred During the Period | (149,770) | (167,298) | (33,175)
Changes in Estimated Future Development Costs | (211,592) | (257,458) | 31,406
Net Change in Future Income Taxes | 2,647,842 | (1,539,146) | (1,231,883)
Accretion | 1,403,417 | 766,899 | 329,782
Timing and Other | (143,073) | (1,245,231) | (660,396)
Total Discounted Cash Flow at End of Period | $ 3,110,035 | $ 10,762,699 | $ 5,881,576

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- Definition Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of extensions, discoveries and improved recovery 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 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482245/932-235-55-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 35 -Subparagraph (d) -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-35 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 35A -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-35A + Details
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- Definition Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in the estimated future income tax on future pretax net cash flows related to the entity's 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 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482245/932-235-55-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 35A -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-35A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 35 -Subparagraph (j) -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-35 + Details
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