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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details) | 9 Months Ended
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Sep. 30, 2021 MMBTU $ / MMBTU
FERC Henry Hub Price Swaps Natural Gas Q4 2021 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 254,000 | [1]
Weighted Average Price Swap | 2.63 | [1]
FERC Henry Hub Price Swaps Natural Gas Q1-Q4 2022 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 3,452 | [1]
Weighted Average Price Swap | 2.85 | [1]
FERC Henry Hub Price Swaptions Natural Gas Q1-Q4 2022 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 100,000 | [2]
Weighted Average Price Swap | 2.70 | [2]
FERC Henry Hub Price Collars Natural Gas Q4 2021 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 133,000 | [2]
Weighted Average Floor Price | 2.55 | [2]
Weighted Average Ceiling Price | 3.05 | [2]
FERC Henry Hub Price Collars Natural Gas Q1-Q4 2022 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 145,507 | [2]
Weighted Average Floor Price | 2.69 | [2]
Weighted Average Ceiling Price | 3.40 | [2]
FERC Henry Hub Price Collars Natural Gas Q1-Q4 2023 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 10,603 | [2]
Weighted Average Floor Price | 3.11 | [2]
Weighted Average Ceiling Price | 4.56 | [2]
FERC Henry Hub Call Options Sold Natural Gas Q4 2021 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 50,000 | [2]
Weighted Average Price Swap | 2.68 | [2]
El Paso Natural Gas Basis Swaps Q4 2021 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 35,000 |
Weighted Average Differential To Henry Hub | (0.92) |
WAHA Natural Gas Basis Swaps Q4 2021 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 80,000 |
Weighted Average Differential To Henry Hub | (0.65) |
WAHA Natural Gas Basis Swaps Q1-Q4 2022 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 70,000 |
Weighted Average Differential To Henry Hub | (0.57) |
WAHA Natural Gas Basis Swaps Q1-Q4 2023 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 70,000 |
Weighted Average Differential To Henry Hub | (0.51) |
WAHA Natural Gas Basis Swaps Q1-Q4 2024 [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Volume Per Day (MMBtu/d) | MMBTU | 40,000 |
Weighted Average Differential To Henry Hub | (0.51) |
[1] | Related to the 2021 open positions, 14,000 MMBtu/d settle against the Inside FERC first of month Henry Hub index at an average price of $2.85 and 240,000 MMBtu/d settle against the end of month NYMEX index at an average price of $2.62. All 2022 open positions settle against the Inside FERC first of month Henry Hub index.
[2] | Price swaptions and call options settle against end of month NYMEX index. Price collars settle against the Inside FERC first of month Henry Hub Index.

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- Definition The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
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