Supplemental Schedules of Oil and Gas Information - Working Interest Reserve Quantity Information (Details) - bbl	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Oil and Condensate (Bbls) [Member]
Beginning of Year (Barrel of Oil)	363,198	376,396
Revisions of Previous Estimates (Barrel of Oil)	(4,587)	26,063
Extensions and Discoveries (Barrel of Oil)	9,383	13,699
Purchase of Reserves (Barrel of Oil)	19,219
Production (Barrel of Oil)	(56,051)	(52,960)
End of Year (Barrel of Oil)	331,162	363,198
Beginning of Year (Barrel of Oil)	326,752	341,152
End of Year (Barrel of Oil)	314,932	326,752
Gas (MCF) [Member]
Beginning of Year (Barrel of Oil)	2,831,861	3,191,511
Revisions of Previous Estimates (Barrel of Oil)	(281,944)	75,610
Extensions and Discoveries (Barrel of Oil)	377,521	8,094
Purchase of Reserves (Barrel of Oil)	7,860
Production (Barrel of Oil)	(474,865)	(443,354)
End of Year (Barrel of Oil)	2,460,433	2,831,861
Beginning of Year (Barrel of Oil)	2,576,738	2,944,804
End of Year (Barrel of Oil)	2,298,135	2,576,738