Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Parenthetical) (Details)	3 Months Ended
	Mar. 31, 2022 $ / MMBTU bbl
FERC Henry Hub Natural Gas [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	10,000
Weighted Average Price Swap | $ / MMBTU	3.65
NYMEX West Texas Intermediate [Member]
Derivatives, Fair Value [Line Items]
Volume Per Day (Bbls/d) | bbl	100,000
Weighted Average Price Swap | $ / MMBTU	2.70