Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Proved Developed and Undeveloped Reserves (Detail)		12 Months Ended
		Dec. 31, 2023 MMcfe MMBbls MMcf	Dec. 31, 2022 MMcfe MMcf MMBbls	Dec. 31, 2021 MMcfe MMcf MMBbls
Proved undeveloped reserves:
Proved undeveloped reserves | MMcfe		6,577,273	7,144,476
Natural Gas
Reserve Quantities [Line Items]
Beginning Balance | MMcf		11,797,972	11,452,081	11,148,560
Revisions | MMcf		326,783	(393,165)	(311,410)
Extensions, discoveries and additions | MMcf		24,078	1,278,499	1,155,952
Production | MMcf		(538,085)	(539,443)	(541,021)
Ending Balance | MMcf		11,610,748	11,797,972	11,452,081
Proved developed reserves:
Proved developed reserves | MMcf		7,631,202	7,230,313	6,809,849
Proved undeveloped reserves:
Proved undeveloped reserves | MMcf		3,979,546	4,567,659	4,642,232
NGLs
Reserve Quantities [Line Items]
Beginning Balance		1,003,958	1,001,305	951,466
Revisions		44,515	(20,251)	16,845
Extensions, discoveries and additions		30,234	59,296	69,367
Production		(37,940)	(36,392)	(36,373)
Ending Balance		1,040,767	1,003,958	1,001,305
Proved developed reserves:
Proved developed reserves		629,379	594,931	577,506
Proved undeveloped reserves:
Proved undeveloped reserves		411,388	409,027	423,798
Crude Oil and Condensate
Reserve Quantities [Line Items]
Beginning Balance		42,656	52,596	57,626
Revisions		2,485	(12,885)	(7,089)
Extensions, discoveries and additions		296	5,661	5,103
Production		(2,475)	(2,716)	(3,044)
Ending Balance		42,962	42,656	52,596
Proved developed reserves:
Proved developed reserves		21,396	22,213	23,833
Proved undeveloped reserves:
Proved undeveloped reserves		21,566	20,443	28,762
Natural Gas Equivalents
Proved developed reserves:
Proved developed reserves | MMcfe	[1]	11,535,852	10,933,180	10,417,887
Proved undeveloped reserves:
Proved undeveloped reserves | MMcfe	[1]	6,577,273	7,144,476	7,357,597
Beginning Balance | MMcfe	[1]	18,077,656	17,775,484	17,203,114
Revisions | MMcfe	[1]	608,784	(591,983)	(252,876)
Extensions, discoveries and additions | MMcfe	[1]	207,260	1,668,244	1,602,769
Production | MMcfe	[1]	(780,575)	(774,089)	(777,523)
Ending Balance | MMcfe	[1]	18,113,125	18,077,656	17,775,484

[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.