Derivatives (Subsequent Schedule of Derivatives Outstanding) (Details) - Natural Gas [Member] - IF - NYMEX (HH) [Member]	1 Months Ended	9 Months Ended
Nov. 06, 2018 $ / Unit MMBTU	Sep. 30, 2018 $ / Unit MMBTU
Swap [Member] \| Jan'19 - Dec'19 [Member]
Derivative [Line Items]
Weighted average price		2.810
Hedged volume (MMBtu/day) \| MMBTU		10,000
Subsequent Event [Member] \| Swap [Member] \| Jan'19 - Dec'19 [Member]
Derivative [Line Items]
Weighted average price	2.850
Hedged volume (MMBtu/day) \| MMBTU	10,000
Subsequent Event [Member] \| Collar [Member] \| Jan'19 - Dec'19 [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) \| MMBTU	20,000
Floor Price	2.63
Cap Price	3.03
Subsequent Event [Member] \| Three-way collar [Member] \| Jan'19 - Mar'19 [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) \| MMBTU	10,000
Floor Price	3.00
Cap Price	4.35
Subfloor price	2.75

Non Designated Derivative Instrument Weighted Average Fixed Price For Swaps

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- Definition

Not Designated as Hedging Instrument Hedged Volume of Natural Gas

+ References

No definition available.

+ Details

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- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

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No definition available.

+ Details

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- Definition

Floor rate on a price risk derivative such as a floor or a collar. 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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No definition available.

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- Definition

The strike price on the price risk option contract such as a put option or a call option.

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No definition available.

+ Details

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