Oil and Natural Gas Properties - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Oil And Natural Gas Properties [Line Items]
Impairment of oil and gas properties	$ 0	$ 100,000	$ 0	$ 60,433,000
Proved properties
Oil And Natural Gas Properties [Line Items]
Depletion expenses	$ 25,900,000	$ 22,800,000	$ 50,100,000	47,300,000
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