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Property, Plant and Equipment - Components (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Intangible Drilling Cost	$ 5,327,242	$ 5,247,800
Gas Gathering Equipment	2,494,440	2,483,561
Proved Gas Properties	1,316,143	1,312,706
Gas Wells and Related Equipment	1,230,617	1,202,731
Unproved Gas Properties	733,440	730,400
Surface Land and Other Equipment	192,973	194,655
Other	189,595	190,249
Total Property, Plant and Equipment	11,484,450	11,362,102
Less: Accumulated Depreciation, Depletion and Amortization	4,488,326	4,372,619
Total Property, Plant and Equipment—Net	$ 6,996,124	$ 6,989,483

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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