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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Proved Developed and Undeveloped Reserves (Detail)
 12 Months Ended
Dec. 31, 2022
MMcfe
MMBbls
MMcf
Dec. 31, 2021
MMcfe
MMBbls
MMcf
Dec. 31, 2020
MMcfe
MMBbls
MMcf
Proved undeveloped reserves:      
Proved undeveloped reserves | MMcfe 7,144,476 7,357,597  
Natural Gas      
Reserve Quantities [Line Items]      
Beginning Balance | MMcf 11,452,081 11,148,560 12,114,977
Revisions | MMcf (393,165) (311,410) (789,992)
Extensions, discoveries and additions | MMcf 1,278,499 1,155,952 1,007,415
Property sales | MMcf     (609,311)
Production | MMcf (539,443) (541,021) (574,529)
Ending Balance | MMcf 11,797,972 11,452,081 11,148,560
Proved developed reserves:      
Proved developed reserves | MMcf 7,230,313 6,809,849 6,350,057
Proved undeveloped reserves:      
Proved undeveloped reserves | MMcf 4,567,659 4,642,232 4,798,503
NGLs      
Reserve Quantities [Line Items]      
Beginning Balance 1,001,305 951,466 938,236
Revisions (20,251) 16,845 42,741
Extensions, discoveries and additions 59,296 69,367 38,298
Property sales     (30,317)
Production (36,392) (36,373) (37,492)
Ending Balance 1,003,958 1,001,305 951,466
Proved developed reserves:      
Proved developed reserves 594,931 577,506 550,771
Proved undeveloped reserves:      
Proved undeveloped reserves 409,027 423,798 400,695
Crude Oil and Condensate      
Reserve Quantities [Line Items]      
Beginning Balance 52,596 57,626 74,532
Revisions (12,885) (7,089) (12,444)
Extensions, discoveries and additions 5,661 5,103 4,512
Property sales     (6,145)
Production (2,716) (3,044) (2,829)
Ending Balance 42,656 52,596 57,626
Proved developed reserves:      
Proved developed reserves 22,213 23,833 22,976
Proved undeveloped reserves:      
Proved undeveloped reserves 20,443 28,762 34,650
Natural Gas Equivalents      
Proved developed reserves:      
Proved developed reserves | MMcfe [1] 10,933,180 10,417,887 9,792,540
Proved undeveloped reserves:      
Proved undeveloped reserves | MMcfe [1] 7,144,476 7,357,597 7,410,574
Beginning Balance | MMcfe [1] 17,775,484 17,203,114 18,191,583
Revisions | MMcfe [1] (591,983) (252,876) (608,211)
Extensions, discoveries and additions | MMcfe [1] 1,668,244 1,602,769 1,264,282
Property sales | MMcfe [1]     (828,084)
Production | MMcfe [1] (774,089) (777,523) (816,456)
Ending Balance | MMcfe [1] 18,077,656 17,775,484 17,203,114
[1] Oil and NGLs volumes are converted to mcfe at the rate of one barrel equals six mcf based upon the approximate relative energy content of oil to natural gas, which is not indicative of the relationship between oil and natural gas prices.