Derivative Commodity - Reclassification (Details)	3 Months Ended
Mar. 31, 2016 MBbls Mcf $ / Mcf $ / bbl
2016 \| NYMEX Swaps \| Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes \| MBbls	5,495,000
Average Contract Price (dollars per Bbl) \| $ / bbl	44.78
2016 \| WTI/WTI Basis Swaps \| Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes \| MBbls	5,643,000
Average Contract Price (dollars per Bbl) \| $ / bbl	(1.92)
2016 \| WTS/WTI Basis Swaps \| Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes \| MBbls	1,572,000
Average Contract Price (dollars per Bbl) \| $ / bbl	(1.64)
2016 \| Basin Specific Swaps - Permian \| Natural Gas
Derivatives, Fair Value [Line Items]
Total Hedged Volumes \| Mcf	5,400,000.0
Average contract price (dollars per Mcf) \| $ / Mcf	2.30
2017 \| NYMEX Swaps \| Crude Oil
Derivatives, Fair Value [Line Items]
Total Hedged Volumes \| MBbls	1,080,000
Average Contract Price (dollars per Bbl) \| $ / bbl	45.05

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ 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

Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract but not the derivative contract itself.

+ References

No definition available.

+ Details

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- Definition

Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in volume but not the derivative contract itself.

+ 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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