Supplemental Information On Oil And Gas Exploration And Production Activities (Unaudited) - Changes in Quantities of Proved Oil and natural Gas Reserves (Details) bbl in Thousands, MMcf in Thousands, Boe in Thousands	12 Months Ended
	Dec. 31, 2021 Boe bbl MMcf	Dec. 31, 2020 Boe bbl MMcf	Dec. 31, 2019 Boe MMcf bbl	Dec. 31, 2018 Boe bbl MMcf
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning balance | Boe	78,875	94,336	98,847
Extensions and discoveries | Boe	21,856	860	5,065
Sales of minerals in place | Boe	(8)		(32)
Purchases of minerals in place | Boe	59,973
Production | Boe	(9,055)	(5,630)	(4,902)
Revision to previous estimates | Boe	(4,054)	(10,691)	(4,642)
Ending Balance | Boe	147,587	78,875	94,336
Proved developed reserves: | Boe	93,575	38,298	31,521	23,646
Proved undeveloped reserves: | Boe	54,012	40,577	62,815	75,201
Oil (MBbl)
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning balance	40,090	52,650	59,034
Extensions and discoveries	7,016	420	3,598
Sales of minerals in place	(8)		(31)
Purchases of minerals in place	25,114
Production	(4,381)	(3,180)	(3,086)
Revision to previous estimates	(6,756)	(9,800)	(6,865)
Ending balance	61,075	40,090	52,650
Proved developed reserves:	35,824	18,878	18,220	14,325
Proved undeveloped reserves:	25,251	21,212	34,430	44,709
Natural Gas (MMcf)
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning balance | MMcf	111,215	107,990	113,217
Extensions and discoveries | MMcf	49,846	1,258	4,476
Sales of minerals in place | MMcf	(1)		(4)
Purchases of minerals in place | MMcf	106,539
Production | MMcf	(14,505)	(7,282)	(4,760)
Revision to previous estimates | MMcf	31,787	9,249	(4,939)
Ending Balance | MMcf	284,881	111,215	107,990
Proved developed reserves: | MMcf	190,999	55,764	35,120	26,110
Proved undeveloped reserves: | MMcf	93,882	55,450	72,870	87,107
NGLs (MBbl)
Proved Developed and Undeveloped Reserves [Roll Forward]
Beginning balance	20,249	23,688	20,943
Extensions and discoveries	6,532	230	721
Sales of minerals in place	0		(1)
Purchases of minerals in place	17,103
Production	(2,257)	(1,237)	(1,022)
Revision to previous estimates	(2,596)	(2,432)	3,047
Ending balance	39,031	20,249	23,688
Proved developed reserves:	25,917	10,125	7,447	4,969
Proved undeveloped reserves:	13,114	10,123	16,241	15,974