Property and Equipment, Net (Full Cost Method) - Narrative (Details)	3 Months Ended			6 Months Ended				9 Months Ended
	Jun. 30, 2022 USD ($) $ / bbl	Jun. 30, 2021 USD ($) $ / bbl	Mar. 31, 2021 USD ($)	Jun. 30, 2022 USD ($) $ / bbl	Jun. 30, 2022 USD ($) $ / bbl $ / bbl	Jun. 30, 2022 USD ($) $ / Mcf $ / bbl	Jun. 30, 2021 USD ($) $ / bbl	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Unproved oil and gas property excluded	$ 54,000,000			$ 54,000,000	$ 54,000,000	$ 54,000,000		$ 57,900,000
Undeveloped leasehold costs transferred				7,700,000			$ 13,500,000
Capitalized costs, proved properties	$ 2,600,000	$ 1,700,000		2,600,000	$ 2,600,000	$ 2,600,000	1,700,000
Interest costs capitalized				$ 2,200,000			$ 1,600,000
Amortization expense per physical unit of production | $ / bbl	15.25	12.82		15.25	15.25	15.25	12.82
Impairments of oil and gas properties	$ 0	$ 0	$ 1,800,000	$ 0			$ 1,811,000	$ 0
West Texas Intermediate
Property, Plant and Equipment [Line Items]
Oil price per barrel (in dollars per barrel)					120	9