Impairments (Details) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Aug. 31, 2020	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Loss on abandonment of assets	$ 0	$ 1,179,000	$ 0		$ 18,733,000	$ 0
Oil and Natural Gas [Member]
Property, Plant and Equipment [Line Items]
Pre-tax non-cash ceiling impairment	13,200,000
Capitalized costs of unproved properties included in amortization, cumulative	226,500,000			$ 226,500,000
Impairment of Oil and Gas Properties				267,800,000
Non-cash Ceiling Test Write-Down Net of Tax				220,800,000
Loss on abandonment of assets				17,600,000
Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use			0			0
Write-off equipment		$ 1,100,000
Mid-Stream [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use			$ 0	64,000,000		$ 0
SCR drilling rigs [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use				407,100,000
Other drilling equipment [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use				3,000,000
BOSS drilling rigs [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Carrying value of asset group	$ 242,500,000			$ 242,500,000