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Derivative Financial Instruments (Details) | Sep. 30, 2013 bbl
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Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 19,800,000
Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 224,400,000
Natural Gas Liquids |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 900,000
NYMEX WTI [Member] |
Derivative Financial Instruments |
Index percent of oil fixed swap | 93.00%
Argus LLS [Member] |
Derivative Financial Instruments |
Index percent of oil fixed swap | 7.00%
IF El Paso Permian [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 3.00%
Index percent of natural gas collars | 2.00%
IF HSC [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 72.00%
Index percent of natural gas collars | 54.00%
IF NGPL TXOK [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 3.00%
Index percent of natural gas collars | 4.00%
IF NNG Ventura [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 2.00%
Index percent of natural gas collars | 5.00%
IF PEPL [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 8.00%
Index percent of natural gas collars | 7.00%
IF Reliant N/S [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 10.00%
Index percent of natural gas collars | 15.00%
IF NGPL MidCont [Member] |
Derivative Financial Instruments |
Index percent of natural gas fixed swaps | 2.00%
IF TETCO STX [Member] |
Derivative Financial Instruments |
Index percent of natural gas collars | 13.00%
OPIS Mont. Belvieu Ethane Purity [Member] |
Derivative Financial Instruments |
Index percent of NGL fixed swaps | 7.00%
OPIS Mont. Belvieu LDH Propane [Member] |
Derivative Financial Instruments |
Index percent of NGL fixed swaps | 45.00%
OPIS Mont. Belvieu Non LDH Isobutane [Member] |
Derivative Financial Instruments |
Index percent of NGL fixed swaps | 13.00%
OPIS Mont. Belvieu Non-LDH Normal Butane [Member] |
Derivative Financial Instruments |
Index percent of NGL fixed swaps | 16.00%
OPIS Mont. Belvieu Non-LDH Natural Gasoline [Member] |
Derivative Financial Instruments |
Index percent of NGL fixed swaps | 19.00%
Swap | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 11,897,000
Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 202,584,000
Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 915,000
Collar | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 7,868,000
Collar | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 21,854,000
Remainder of 2013 [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 1,118,000
Weighted-Average Contract Price | 97.09
Remainder of 2013 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 19,047,000
Weighted-Average Contract Price | 4.06
Remainder of 2013 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 511,000
Weighted-Average Contract Price | 53.16
Remainder of 2013 [Member] | Collar | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 1,480,000
Weighted-Average Floor Price | 88.14
Weighted-Average Ceiling Price | 114.12
Remainder of 2013 [Member] | Collar | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 1,640,000
Weighted-Average Floor Price | 4.39
Weighted-Average Ceiling Price | 5.31
2014 [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 5,164,000
Weighted-Average Contract Price | 95.25
2014 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 64,453,000
Weighted-Average Contract Price | 4.06
2014 [Member] | Swap | Natural Gas Liquids |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 404,000
Weighted-Average Contract Price | 58.42
2014 [Member] | Collar | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 3,022,000
Weighted-Average Floor Price | 84.07
Weighted-Average Ceiling Price | 105.46
2014 [Member] | Collar | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 5,734,000
Weighted-Average Floor Price | 4.38
Weighted-Average Ceiling Price | 5.36
2015 [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 2,911,000
Weighted-Average Contract Price | 89.06
2015 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 49,328,000
Weighted-Average Contract Price | 4.04
2015 [Member] | Collar | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 3,366,000
Weighted-Average Floor Price | 85.00
Weighted-Average Ceiling Price | 94.25
2015 [Member] | Collar | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 14,480,000
Weighted-Average Floor Price | 3.96
Weighted-Average Ceiling Price | 4.30
2016 [Member] | Swap | Crude oil |
Derivative Financial Instruments |
Portion of future oil and NGL production hedged | 2,704,000
Weighted-Average Contract Price | 85.19
2016 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 36,126,000
Weighted-Average Contract Price | 4.18
2017 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 23,430,000
Weighted-Average Contract Price | 4.21
2018 [Member] | Swap | Natural Gas |
Derivative Financial Instruments |
Portion of Gas Production Being Hedged | 10,200,000
Weighted-Average Contract Price | 4.31

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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=6601679&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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