Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation, depletion and amortization	$ 461,215	$ 515,118	$ 501,821
Gas Properties
Property, Plant and Equipment [Line Items]
Depreciation, depletion and amortization	$ 359,761	$ 415,069	$ 400,948
Buildings and Improvements \| Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	10 years
Buildings and Improvements \| Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	45 years
Machinery and Equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	3 years
Machinery and Equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	25 years
Gathering and Transmission \| Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	30 years
Gathering and Transmission \| Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	40 years
Purchased Software
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	7 years