Summary of Significant Accounting Policies - Other Property and equipment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property and Equipment
Depreciation expense		$ 742,009	$ 861,870	$ 914,867
Oil and Gas Properties
Impairment of oil and gas properties		90,523	223,770	1,300,444
Impairment of unproved oil and gas properties		91,000	224,000	393,000
Depreciation, depletion, and amortization expense for oil and gas properties		736,000	854,000	884,000
Impairment of long-lived assets other than oil and gas properties		0	0	15,000
Deferred Financing Costs
Unamortized debt issuance costs		22,000	16,000
Amounts amortized and the write-off of previously deferred debt issuance costs		7,000	8,000	11,000
Utica Shale
Oil and Gas Properties
Impairment of oil and gas properties	$ 881,000
Other long term assets
Deferred Financing Costs
Unamortized debt issuance costs			3,000
Long-term debt
Deferred Financing Costs
Unamortized debt issuance costs		8,000
Other property and equipment
Property and Equipment
Depreciation expense		$ 6,000	8,000	8,000
Other property and equipment | Minimum
Property and Equipment
Estimated useful life		P2Y
Other property and equipment | Maximum
Property and Equipment
Estimated useful life		20 years
Oil and gas property wells
Oil and Gas Properties
Impairment of oil and gas properties		$ 0	$ 0	$ 26,000