Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Parenthetical) (Details)	3 Months Ended
Mar. 31, 2021 $ / MMBTU bbl
FERC Henry Hub Natural Gas [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	30,636
Weighted Average Price Swap \| $ / MMBTU	2.76
NYMEX West Texas Intermediate [Member]
Derivative [Line Items]
Volume Per Day (Bbls/d) \| bbl	240,000
Weighted Average Price Swap \| $ / MMBTU	2.62

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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