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Property, Plant and Equipment - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Abstract]    
Intangible Drilling Cost $ 5,247,800 $ 4,965,252
Gas Gathering Equipment 2,483,561 2,510,917
Proved Gas Properties 1,312,706 1,253,094
Gas Wells and Related Equipment 1,202,731 1,120,061
Unproved Gas Properties 730,400 725,705
Surface Land and Other Equipment 194,655 199,322
Other 190,249 189,645
Total 11,362,102 10,963,996
Less: Accumulated Depreciation, Depletion and Amortization 4,372,619 3,938,451
Total Property, Plant and Equipment—Net $ 6,989,483 $ 7,025,545