Derivatives Derivatives (Schedule of Subsequent Derivatives Outstanding) (Details)	1 Months Ended	3 Months Ended
May 03, 2018 $ / Unit MMBTU bbl	Mar. 31, 2018 $ / Unit MMBTU
Basis swap [Member] \| NGPL Texok [Member] \| Jan'20 - Dec'20 [Member] \| Natural Gas [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) \| MMBTU		20,000
Weighted average price		(0.280)
Basis swap [Member] \| NGPL Texok [Member] \| Jan'19 - Dec'19 [Member] \| Natural Gas [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) \| MMBTU		30,000
Weighted average price		(0.265)
Basis swap [Member] \| Subsequent Event [Member] \| NGPL Texok [Member] \| Jan'20 - Dec'20 [Member] \| Natural Gas [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) \| MMBTU	10,000
Weighted average price	(0.265)
Three-way collar [Member] \| Subsequent Event [Member] \| WTI - NYMEX [Member] \| Jan'19 - Dec'19 [Member] \| Crude Oil [Member]
Derivative [Line Items]
Hedged volume (Bbl/day) \| bbl	1,000
Subfloor price	45.00
Floor Price	55.00
Cap Price	70.25

Non Designated Derivative Instrument Weighted Average Fixed Price For Swaps

No definition available.

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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

Not Designated as Hedging Instrument Hedged Volume of Oil

+ 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.

+ References

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.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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