Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Line Items]
Future discounted net cash flows discounted							10.00%
Capitalized costs of unproved properties included in amortization, cumulative				$ 226,500	$ 50,000			$ 50,000
Non-cash Ceiling Test Write-Down Net of Tax				220,800	127,900
Loss on abandonment of assets	$ 0	$ 1,179			0	$ 18,733		$ 0
Oil and Natural Gas [Member]
Property, Plant and Equipment [Line Items]
Impairment of Oil and Gas Properties	$ 13,200	16,600	$ 109,300	267,800	$ 169,300
Loss on abandonment of assets				17,600
Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Loss on abandonment of assets		$ 1,100
Mid-Stream [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use				64,000
BOSS drilling rigs [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Carrying value of asset group				242,500
SCR drilling rigs [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use				407,100
Other drilling equipment [Member] | Drilling Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use				$ 3,000