Supplemental Information on Oil and Natural Gas Operations (Unaudited) - Narrative (Details) Boe in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2021 Boe	Dec. 31, 2021 $ / bbl	Dec. 31, 2021 $ / MMBTU	Dec. 31, 2021 $ / Mcf	Dec. 31, 2022 Boe $ / Mcf $ / bbl $ / MMBTU	Sep. 30, 2021 Boe	Sep. 30, 2021 $ / bbl	Sep. 30, 2021 $ / MMBTU	Sep. 30, 2021 $ / Mcf
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Revisions	133				(6,331)	4,772
Extensions and discoveries	2,026				14,796	13,759
Result of drilling successful wells that were previously classified as unproved locations					7,759	6,564
Result of drilling successful wells offsetting locations that were previously unproven locations					7,037	7,195
West Texas Intermediate (WTI)
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Oil and natural gas liquids, average WTI intermediate spot price (USD per bbl) | $ / bbl		66.55			94.14		57.64
Henry Hub
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Gas, average henry hub spot price (USD per mmbtu) | $ / MMBTU			3.60		6.36			2.94
Oil
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Percentage of reserves	64.10%	64.10%	64.10%	64.10%	62.90%	64.10%	64.10%	64.10%	64.10%
Price (USD per bbl/mcf) | $ / bbl		64.60			91.96		55.73
Natural Gas
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Percentage of reserves	17.60%	17.60%	17.60%	17.60%	18.50%	17.60%	17.60%	17.60%	17.60%
Price (USD per bbl/mcf)		1.65		1.65	3.16		0.99		0.99
NGLs
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Percentage of reserves	18.30%	18.30%	18.30%	18.30%	18.60%	18.30%	18.30%	18.30%	18.30%
Price (USD per bbl/mcf)		13.75		13.75	25.55		9.83		9.83