Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Proved Developed and Undeveloped Reserves (Detail)		12 Months Ended
		Dec. 31, 2024 MMcfe MMBbls MMcf	Dec. 31, 2023 MMcfe MMBbls MMcf	Dec. 31, 2022 MMcfe MMBbls MMcf	Dec. 31, 2021 MMBbls MMcf
Natural Gas
Reserve Quantities [Line Items]
Beginning Balance | MMcf		11,610,748	11,797,972	11,452,081
Revisions | MMcf		17,299	326,783	(393,165)
Extensions, discoveries and additions | MMcf		578,660	24,078	1,278,499
Property sales | MMcf		(10,542)
Production | MMcf		(545,416)	(538,085)	(539,443)
Ending Balance | MMcf		11,650,749	11,610,748	11,797,972
Proved developed reserves:
Proved developed reserves | MMcf		7,929,452	7,631,202	7,230,313	6,809,849
Proved undeveloped reserves:
Proved undeveloped reserve | MMcf		3,721,297	3,979,546	4,567,659	4,642,232
NGLs
Reserve Quantities [Line Items]
Beginning Balance		1,040,767	1,003,958	1,001,305
Revisions		16,530	44,515	(20,251)
Extensions, discoveries and additions		25,659	30,234	59,296
Property sales		0
Production		(39,623)	(37,940)	(36,392)
Ending Balance		1,043,333	1,040,767	1,003,958
Proved developed reserves:
Proved developed reserves		647,430	629,379	594,931	577,507
Proved undeveloped reserves:
Proved undeveloped reserve		395,903	411,388	409,027	423,798
Crude Oil and Condensate
Reserve Quantities [Line Items]
Beginning Balance		42,962	42,656	52,596
Revisions		(6,785)	2,485	(12,885)
Extensions, discoveries and additions		2,792	296	5,661
Property sales		0
Production		(2,181)	(2,475)	(2,716)
Ending Balance		36,788	42,962	42,656
Proved developed reserves:
Proved developed reserves		19,460	21,396	22,213	23,833
Proved undeveloped reserves:
Proved undeveloped reserve		17,328	21,566	20,443	28,763
Natural Gas Equivalents
Proved developed reserves:
Proved developed reserves | MMcf	[1]	11,930,793	11,535,852	10,933,180	10,417,887
Proved undeveloped reserves:
Proved undeveloped reserve | MMcf	[1]	6,200,682	6,577,273	7,144,476	7,357,597
Beginning Balance | MMcfe	[1]	18,113,125	18,077,656	17,775,484
Revisions | MMcfe	[1]	75,765	608,784	(591,983)
Extensions, discoveries and additions | MMcfe	[1]	749,362	207,260	1,668,244
Property Sales | MMcfe	[1]	(10,542)
Production | MMcfe	[1]	(796,235)	(780,575)	(774,089)
Ending Balance | MMcfe	[1]	18,131,475	18,113,125	18,077,656

[1] (a) 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.