Derivative Financial Instruments (Schedule Of Open Oil Derivative Positions) (Details)	3 Months Ended
	Mar. 31, 2022 $ / bbl bbl
NYMEX West Texas Intermediate Price Swaps Oil Q2-Q4 2022 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	35,258
Weighted Average Price Swap	44.50
NYMEX West Texas Intermediate Price Collars Oil Q1-Q4 2023 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	6,193
Weighted Average Floor Price	61.32
Weighted Average Ceiling Price	97.65
NYMEX West Texas Intermediate Price Collars Oil Q2-Q4 2022 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	37,658
Weighted Average Floor Price	55.56
Weighted Average Ceiling Price	74.84
BRENT Basis Swaps Oil Q2-Q4 2022 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	1,000
Oil Basis Swaps	(7.75)
NYMEX Roll Basis Swaps Oil Q2-Q4 2022 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	29,000
Oil Basis Swaps	0.45
Midland Sweet Q1 Q4 2023 [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	3,000
Oil Basis Swaps	0.73