Organization and Summary of Significant Accounting Policies (Oil and Gas, Average Sale Price and Production Cost) (Details)	12 Months Ended
	Dec. 31, 2022 $ / MMBTU	Dec. 31, 2022 $ / barrel	Dec. 31, 2022 $ / bbl	Dec. 31, 2021 $ / MMBTU	Dec. 31, 2021 $ / barrel	Dec. 31, 2021 $ / bbl	Dec. 31, 2020 $ / MMBTU	Dec. 31, 2020 $ / barrel	Dec. 31, 2020 $ / bbl
Natural Gas
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Average sales price (in dollars per unit)	6.36			3.60			1.98
Oil
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Average sales price (in dollars per unit)		93.67	93.67		66.56	66.56		39.57	39.57
NGL
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Average sales price (in dollars per unit)		34.35	34.35		28.65	28.65		10.27	10.27