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Supplemental Information on Oil and Gas Operations (Unaudited) (Proved Developed and Undeveloped Reserves) (Details)
MMcf in Thousands, MMBbls in Thousands
 12 Months Ended
Dec. 31, 2023
MMBoe
MMcfe
MMBbls
MMcf
Dec. 31, 2022
MMBoe
MMBbls
MMcf
Dec. 31, 2021
MMBoe
MMBbls
MMcf
Dec. 31, 2020
MMBoe
MMBbls
MMcf
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance | MMBoe 1,815 1,625 752  
Proved developed and undeveloped reserves, revisions due to prices | MMBoe (78) 34 155  
Proved developed and undeveloped reserves, revisions other than price | MMBoe (1) (49) 43  
Proved developed and undeveloped reserves, extensions and discoveries | MMBoe 322 278 228  
Proved developed and undeveloped reserves, Purchase of reserves | MMBoe   153 663  
Proved developed and undeveloped reserves, production | MMBoe (240) (223) (209)  
Proved developed and undeveloped reserves, sale of reserves | MMBoe (1) (3) (7)  
Proved developed and undeveloped reserves, ending balance 1,817 1,815 1,625  
Proved developed reserves | MMBoe 1,425 1,419 1,285 574
Proved developed producing reserves | MMBoe 1,390 1,397 1,260 564
Proved undeveloped reserves | MMBoe 392 396 340 178
Conversion rate of gas reserves from barrels of oil to Boe 6      
Oil [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance 793 709 282  
Proved developed and undeveloped reserves, revisions due to prices (25) 15 55  
Proved developed and undeveloped reserves, revisions other than price (12) (55) (23)  
Proved developed and undeveloped reserves, extensions and discoveries 147 127 112  
Proved developed and undeveloped reserves, Purchase of reserves   106 393  
Proved developed and undeveloped reserves, production (117) (109) (106)  
Proved developed and undeveloped reserves, sale of reserves 0 0 (4)  
Proved developed and undeveloped reserves, ending balance 786 793 709  
Proved developed reserves 603 596 544 194
Proved developed producing reserves 586 585 533 190
Proved undeveloped reserves 183 197 165 88
Natural Gas [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance | MMcf [1] 3,175,000 2,878,000 1,512,000  
Proved developed and undeveloped reserves, revisions due to prices [1] (189,000) 61,000 382,000  
Proved developed and undeveloped reserves, revisions other than price | MMcf [1] 58,000 13,000 11,000  
Proved developed and undeveloped reserves, extensions and discoveries | MMcf [1] 525,000 449,000 348,000  
Proved developed and undeveloped reserves, Purchase of reserves | MMcf [1]   137,000 961,000  
Proved developed and undeveloped reserves, production | MMcf [1] (385,000) (356,000) (325,000)  
Proved developed and undeveloped reserves, sale of reserves | MMcf [1] (2,000) (7,000) (11,000)  
Proved developed and undeveloped reserves, ending balance [1] 3,182,000 3,175,000 2,878,000  
Proved developed reserves | MMcf [1] 2,560,000 2,595,000 2,361,000 1,244,000
Proved developed producing reserves | MMcf [1] 2,505,000 2,553,000 2,316,000 1,223,000
Proved undeveloped reserves | MMcf [1] 622,000 580,000 517,000 268,000
Natural Gas Liquids [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance 493 437 218  
Proved developed and undeveloped reserves, revisions due to prices (22) 8 36  
Proved developed and undeveloped reserves, revisions other than price 1 3 64  
Proved developed and undeveloped reserves, extensions and discoveries 87 76 58  
Proved developed and undeveloped reserves, Purchase of reserves   24 110  
Proved developed and undeveloped reserves, production (59) (54) (48)  
Proved developed and undeveloped reserves, sale of reserves 0 (1) (1)  
Proved developed and undeveloped reserves, ending balance 500 493 437  
Proved developed reserves 395 391 348 173
Proved developed producing reserves 386 387 341 171
Proved undeveloped reserves 105 102 89 45
[1] Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. NGL reserves are converted to Boe on a one-to-one basis with oil. The conversion rates are not necessarily indicative of the relationship of oil, natural gas and NGL prices.