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Derivative Financial Instruments (Details) bbl in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2017 MMBTU $ / EnergyContent $ / Barrels bbl | Apr. 26, 2017 MMBTU $ / EnergyContent $ / Barrels bbl | Dec. 31, 2016 MMBTU $ / EnergyContent
Derivative Financial Instruments |  |  |  |  |
Percentage of Proved Property Secured for Credit Facility Borrowing |  | 90.00% |  |  |
NYMEX Oil Swap Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 1,444 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 46.44 |  |  |
NYMEX Oil Swap Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 1,340 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 46.66 |  |  |
NYMEX Oil Swap Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 1,254 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 46.35 |  |  |
NYMEX Oil Swap Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 4,038 |  |  |
NYMEX Oil Collar Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 636 |  |  |
Derivative, Floor Price | $ / Barrels |  | 45.00 |  |  |
Derivative, Cap Price | $ / Barrels |  | 54.10 |  |  |
NYMEX Oil Collar Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 583 |  |  |
Derivative, Floor Price | $ / Barrels |  | 45.00 |  |  |
Derivative, Cap Price | $ / Barrels |  | 54.05 |  |  |
NYMEX Oil Collar Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 540 |  |  |
Derivative, Floor Price | $ / Barrels |  | 45.00 |  |  |
Derivative, Cap Price | $ / Barrels |  | 54.01 |  |  |
NYMEX Oil Collar Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 3,343 |  |  |
Derivative, Floor Price | $ / Barrels |  | 50.00 |  |  |
Derivative, Cap Price | $ / Barrels |  | 58.55 |  |  |
NYMEX Oil Collar Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 2,660 |  |  |
Derivative, Floor Price | $ / Barrels |  | 50.00 |  |  |
Derivative, Cap Price | $ / Barrels |  | 59.31 |  |  |
NYMEX Oil Collar Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 7,762 |  |  |
Oil Basis Swap Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 2,080 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [1] | (1.27) |  |  |
Oil Basis Swap Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 1,588 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [1] | (1.45) |  |  |
Oil Basis Swap [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 3,668 |  |  |
Gas Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  | 3.98 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  | 26,205,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU | [2] | 0 |  |  |
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  | 0.00 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU |  | 26,205,000 |  |  |
Gas Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  | 4.01 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  | 23,657,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU | [2] | 0 |  |  |
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  | 0.00 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU |  | 23,657,000 |  |  |
Gas Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  | 3.98 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  | 22,001,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU | [2] | 0 |  |  |
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  | 0.00 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU |  | 22,001,000 |  |  |
Gas Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  | 3.54 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  | 75,778,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU | [2] | (30,606,000) |  |  |
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  | 4.27 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU |  | 45,172,000 |  |  |
Gas Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  | 4.02 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  | 32,016,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU | [2] | (24,415,000) |  |  |
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  | 4.34 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU |  | 7,601,000 |  |  |
Gas Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU | [3] | 179,657,000 |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU |  | (55,021,000) | [2],[3] |  | (55,021,000)
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU | [3] | 124,636,000 |  |  |
Gas Swaps Contract 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  |  |  |  | 38,600,000
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent |  |  |  |  | 4.43
IF El Paso Permian [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Index percent of natural gas fixed swaps |  | 2.00% |  |  |
IF HSC [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Index percent of natural gas fixed swaps |  | 95.00% |  |  |
IF NNG Ventura [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Index percent of natural gas fixed swaps |  | 3.00% |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 787 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 8.86 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 736 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 9.14 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 692 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 9.10 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 2,434 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 10.18 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 2,176 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 11.95 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2020 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 539 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 11.13 |  |  |
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 7,364 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 634 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 21.90 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 588 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 21.91 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 550 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 21.91 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 1,442 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 22.86 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 3,214 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 182 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 32.53 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 163 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 32.42 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 149 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 32.34 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 138 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 35.41 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 632 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 157 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 33.38 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 140 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 33.28 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 128 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 33.23 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 119 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 35.44 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 544 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 249 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 48.47 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 222 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 48.43 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 203 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 48.41 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 189 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 49.40 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 0 |  |  |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  | 0.00 |  |  |
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  | 863 |  |  |
Subsequent Event [Member] | NYMEX Oil Collar Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 546 |
Derivative, Floor Price | $ / Barrels |  |  |  | 50.00 |
Derivative, Cap Price | $ / Barrels |  |  |  | 58.08 |
Subsequent Event [Member] | NYMEX Oil Collar Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 1,687 |
Derivative, Floor Price | $ / Barrels |  |  |  | 50.00 |
Derivative, Cap Price | $ / Barrels |  |  |  | 57.12 |
Subsequent Event [Member] | NYMEX Oil Collar Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 468 |
Derivative, Floor Price | $ / Barrels |  |  |  | 50.00 |
Derivative, Cap Price | $ / Barrels |  |  |  | 56.20 |
Subsequent Event [Member] | NYMEX Oil Collar Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 2,701 |
Subsequent Event [Member] | Oil Basis Swap Contract Third Quarter 2017 [Domain] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 566 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [4] |  |  | (1.62) |
Subsequent Event [Member] | Oil Basis Swap Contract Fourth Quarter 2017 [Domain] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 1,403 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [4] |  |  | (1.55) |
Subsequent Event [Member] | Oil Basis Swap Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 3,584 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [4] |  |  | (1.50) |
Subsequent Event [Member] | Oil Basis Swap Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 2,375 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels | [4] |  |  | (1.45) |
Subsequent Event [Member] | Oil Basis Swap [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 7,928 |
Subsequent Event [Member] | Gas Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  |  |  | 2.87 |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  |  |  | 17,236,000 |
Subsequent Event [Member] | Gas Swaps Contract 2019 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / EnergyContent |  |  |  | 2.88 |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU |  |  |  | 9,378,000 |
Subsequent Event [Member] | Gas Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU | [3] |  |  | 26,614,000 |
Subsequent Event [Member] | OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Second Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 105 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  |  |  | 10.97 |
Subsequent Event [Member] | OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Third Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 170 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  |  |  | 10.98 |
Subsequent Event [Member] | OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 274 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  |  |  | 11.04 |
Subsequent Event [Member] | OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2018 [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume |  |  |  | 1,157 |
Derivative, Swap Type, Average Fixed Price | $ / Barrels |  |  |  | 12.23 |
Subsequent Event [Member] | OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contracts [Member] |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
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Derivative Financial Instruments |  |  |  |  |
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[1] | Represents the price differential between WTI prices at Midland, Texas and WTI prices at Cushing, Oklahoma.
[2] | During 2016, the Company restructured certain of its gas derivative contracts by buying fixed price volumes to offset existing 2018 and 2019 fixed price swap contracts totaling 55.0 million MMBtu. The Company then entered into new 2017 fixed price swap contracts totaling 38.6 million MMBtu with a contract price of $4.43 per MMBtu. No other cash or other consideration was included as part of the restructuring.
[3] | Total net volumes of natural gas swaps are comprised of IF El Paso Permian (2%), IF HSC (95%), and IF NNG Ventura (3%).
[4] | Represents the price differential between WTI prices at Midland, Texas and WTI prices at Cushing, Oklahoma.

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