Derivatives - Open Commodity Derivative Contracts (Details) - Jun. 30, 2015	$ / Mcf $ / bbl MBbls MMcf
July 2015 - December 2015 \| Oil Price Swaps
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MBbls	1,570
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf)	93.02
July 2015 - December 2015 \| Natural Gas Price Swaps
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MMcf	3,680
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) \| $ / Mcf	4.20
July 2015 - December 2015 \| Natural Gas Basis Swaps
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MMcf	31,280
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) \| $ / Mcf	(0.30)
July 2015 - December 2015 \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MBbls	3,128
July 2015 - December 2015 \| Natural Gas Collars
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MMcf	509
Collar Range, minimum \| $ / Mcf	4.00
Collar Range, maximum \| $ / Mcf	8.55
July 2015 - December 2015 \| Sold Put \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, minimum	78.15
July 2015 - December 2015 \| Purchased Put \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, minimum	90.03
July 2015 - December 2015 \| Sold Call \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, maximum	103.65
January 2016 - December 2016 \| Oil Price Swaps
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MBbls	1,464
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf)	88.36
January 2016 - December 2016 \| Natural Gas Basis Swaps
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MMcf	10,980
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) \| $ / Mcf	(0.38)
January 2016 - December 2016 \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) \| MBbls	2,556
January 2016 - December 2016 \| Sold Put \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, minimum	83.14
January 2016 - December 2016 \| Purchased Put \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, minimum	90.00
January 2016 - December 2016 \| Sold Call \| Oil Collars - Three Way
Derivative Instruments and Hedging Activities Disclosure
Collar Range, maximum	100.85

Derivative Instruments and Hedging Activities Disclosure [Line Items]

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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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- 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.

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Nominal volume used to calculate payments on a derivative instrument.

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- Definition

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

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