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Derivative Financial Instruments (Schedule Of Open Natural Gas Derivative Positions) (Details)	6 Months Ended
	Jun. 30, 2019 MMBTU $ / MMBTU
FERC Henry Hub Price Swaps Natural Gas Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	257,800
Weighted Average Price Swap	2.80
FERC Henry Hub Price Swaps Natural Gas Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	81,409
Weighted Average Price Swap	2.77
FERC Henry Hub Price Collars Natural Gas Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	200,500
Weighted Average Floor Price	2.63
Weighted Average Ceiling Price	3.02
FERC Henry Hub Price Collars Natural Gas Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	42,557
Weighted Average Floor Price	2.73
Weighted Average Ceiling Price	3.03
PEPL Basis Swaps Natural Gas Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	20,000
Weighted Average Differential To Henry Hub	(0.56)
El Paso Natural Gas Basis Swaps Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	130,000
Weighted Average Differential To Henry Hub	(1.46)
Houston Ship Channel Natural Gas Basis Swaps Q3-Q4 2019 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	162,500
Weighted Average Differential To Henry Hub	0.01
PEPL Basis Swaps Natural Gas Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	30,000
Weighted Average Differential To Henry Hub	(0.47)
El Paso Natural Gas Basis Swaps Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	40,000
Weighted Average Differential To Henry Hub	(0.67)
Houston Ship Channel Natural Gas Basis Swaps Q1-Q4 2020 [Member]
Derivative [Line Items]
Volume Per Day (MMBtu/d) | MMBTU	10,000
Weighted Average Differential To Henry Hub	0.02

X

- Definition

Weighted Average Differential To Henry Hub

+ References

No definition available.

+ Details

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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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- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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- Definition

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.

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

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+ Details

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- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

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- Details

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