Oil and Natural Gas Properties - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Oil And Natural Gas Properties [Line Items]
Impairment of oil and gas properties	$ 0	$ 2,100,000	$ 0	$ 62,548,000
Proved properties
Oil And Natural Gas Properties [Line Items]
Depletion expenses	$ 26,900,000	$ 28,400,000	$ 77,000,000	75,700,000
Impairment of oil and gas properties				25,252,000
Unproved properties
Oil And Natural Gas Properties [Line Items]
Impairment of oil and gas properties				$ 11,311,000
Unproved properties | Minimum
Oil And Natural Gas Properties [Line Items]
Unproved oil and gas lease term			3 years
Unproved properties | Maximum
Oil And Natural Gas Properties [Line Items]
Unproved oil and gas lease term			5 years