SUPPLEMENTAL GAS DATA (unaudited) - Capitalized Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Extractive Industries [Abstract]
Intangible Drilling Cost	$ 6,171,177	$ 5,902,498
Gas Gathering Assets	2,660,668	2,631,110
Proved Gas Properties	1,396,631	1,374,685
Unproved Gas Properties	721,692	724,401
Gas Wells and Related Equipment	1,657,272	1,513,945
Other Gas Assets	136,138	119,163
Total Property, Plant and Equipment	12,743,578	12,265,802
Accumulated Depreciation, Depletion and Amortization	(5,561,023)	(5,110,938)
Net Capitalized Costs	$ 7,182,555	$ 7,154,864

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Drilling Cost

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Amount of accumulated depreciation, depletion, amortization, and valuation allowance for capitalized cost in oil- and gas-producing activities.

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Amount, before accumulated depreciation, depletion, amortization, and valuation allowance, of capitalized cost in oil- and gas-producing activities.

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Amount, after accumulated depreciation, depletion, amortization, and valuation allowance, of capitalized cost in oil- and gas-producing activities.

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Amount, before accumulated depreciation, depletion, amortization, and valuation allowance, of capitalized cost for support equipment and facility in oil- and gas-producing activities. Includes, but is not limited to, seismic, drilling, construction, and grading equipment, vehicle, repair shop, warehouse, supply point, camp, division, district, and field office.

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Amount, before accumulated depreciation, depletion, amortization, and valuation allowance, of capitalized cost for well and related equipment and facility in oil- and gas-producing activities. Includes, but is not limited to, cost incurred to drill and equip exploratory well and exploratory-type stratigraphic test well that has found proved reserve and cost incurred to obtain access to proved reserve and provide facility for extracting, treating, gathering, and storing oil and gas, including the drilling and equipping of development well, development-type stratigraphic test well, and service well.

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Amount, before accumulated depreciation, depletion, amortization, and impairment, of oil and gas properties with proved reserve accounted for under successful efforts method.

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Amount, before accumulated depreciation, depletion, amortization, and impairment, of oil and gas properties with unproved reserve accounted for under successful efforts method.

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