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Derivative Financial Instruments (Details) - Jun. 30, 2015 | MMBTU $ / EnergyContent $ / Barrels bbl
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Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 9,700,000
Natural Gas [Member] |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | MMBTU | 167,000,000
Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 9,500,000
IF El Paso Permian [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 3.00%
Index percent of natural gas collars | 5.00%
IF HSC [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 93.00%
Index percent of natural gas collars | 88.00%
IF NGPL TXOK [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 1.00%
IF NNG Ventura [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 3.00%
Index percent of natural gas collars | 7.00%
OPIS Ethane Purity Mont Belvieu [Member] |
Derivative Financial Instruments |
Index percent of natural gas liquid swaps | 52.00%
OPIS Propane Mont Belvieu Non-TET [Member] |
Derivative Financial Instruments |
Index percent of natural gas liquid swaps | 29.00%
OPIS Normal Butane Mont Belvieu Non-TET [Member] |
Derivative Financial Instruments |
Index percent of natural gas liquid swaps | 10.00%
OPIS Isobutane Mont Belvieu Non-TET [Member] |
Derivative Financial Instruments |
Index percent of natural gas liquid swaps | 9.00%
Swap | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 7,961,000
Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | MMBTU | 159,862,000
Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 9,497,000
Collar [Member] | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,775,000
Collar [Member] | Natural Gas [Member] |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | MMBTU | 7,162,000
Third Quarter Current Year [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,254,000
Weighted-Average Contract Price | $ / Barrels | 90.78
Third Quarter Current Year [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.03
Portion of Gas Production Being Hedged | MMBTU | 12,835,000
Third Quarter Current Year [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,739,000
Weighted-Average Contract Price | $ / Barrels | 21.61
Third Quarter Current Year [Member] | Collar [Member] | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 906,000
Weighted-Average Floor Price | $ / Barrels | 85.00
Weighted-Average Ceiling Price | $ / Barrels | 91.25
Third Quarter Current Year [Member] | Collar [Member] | Natural Gas [Member] |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | MMBTU | 2,005,000
Weighted-Average Floor Price | $ / EnergyContent | 4.00
Weighted-Average Ceiling Price | $ / EnergyContent | 4.30
Fourth Quarter Current Year [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,137,000
Weighted-Average Contract Price | $ / Barrels | 90.15
Fourth Quarter Current Year [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.01
Portion of Gas Production Being Hedged | MMBTU | 12,499,000
Fourth Quarter Current Year [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,539,000
Weighted-Average Contract Price | $ / Barrels | 21.73
Fourth Quarter Current Year [Member] | Collar [Member] | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 869,000
Weighted-Average Floor Price | $ / Barrels | 85.00
Weighted-Average Ceiling Price | $ / Barrels | 92.19
Fourth Quarter Current Year [Member] | Collar [Member] | Natural Gas [Member] |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | MMBTU | 5,157,000
Weighted-Average Floor Price | $ / EnergyContent | 3.99
Weighted-Average Ceiling Price | $ / EnergyContent | 4.29
2016 [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 5,570,000
Weighted-Average Contract Price | $ / Barrels | 88.01
2016 [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.13
Portion of Gas Production Being Hedged | MMBTU | 45,172,000
2016 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 2,017,000
Weighted-Average Contract Price | $ / Barrels | 17.70
2017 [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.19
Portion of Gas Production Being Hedged | MMBTU | 34,335,000
2017 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 792,000
Weighted-Average Contract Price | $ / Barrels | 9.98
2018 [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.27
Portion of Gas Production Being Hedged | MMBTU | 30,606,000
2018 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,671,000
Weighted-Average Contract Price | $ / Barrels | 10.65
2019 [Member] | Swap | Natural Gas [Member] |
Derivative Financial Instruments |
Weighted-Average Contract Price | $ / EnergyContent | 4.34
Portion of Gas Production Being Hedged | MMBTU | 24,415,000
2019 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 1,200,000
Weighted-Average Contract Price | $ / Barrels | 10.92
2020 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of Future Oil and Gas Production Being Hedged | 539,000
Weighted-Average Contract Price | $ / Barrels | 11.13

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- Definition The quantity of future oil and gas production being hedged. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 12.D.3(b)) -URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 12 -Section D -Paragraph b -Subsection 3 + Details
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