Derivatives Derivatives (Schedule of Subsequent Derivatives Outstanding) (Details) - WTI - NYMEX [Member] - Crude Oil [Member] - Jan'18 - Dec'18 [Member]	1 Months Ended	6 Months Ended
Aug. 03, 2017 $ / Unit bbl	Jun. 30, 2017 $ / Unit bbl
Swap [Member] \| Subsequent Event [Member]
Derivative [Line Items]
Weighted average price	50.00
Hedged volume (Bbl/day) \| bbl	500
Three-way collar [Member]
Derivative [Line Items]
Hedged volume (Bbl/day) \| bbl		1,000
Cap Price		56.65
Subfloor price		40.00
Floor Price		50.00
Three-way collar [Member] \| Subsequent Event [Member]
Derivative [Line Items]
Hedged volume (Bbl/day) \| bbl	1,000
Cap Price	55.50
Subfloor price	35.00
Floor Price	45.00

Non Designated Derivative Instrument Weighted Average Fixed Price For Swaps

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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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