Derivative Financial Instruments (Details)			2 Months Ended
		Dec. 31, 2016 MMBTU $ / EnergyContent $ / Barrels bbl	Feb. 15, 2017 $ / Barrels bbl
NYMEX Oil Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		11,300,000
NGL Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		13,400,000
NYMEX Oil Swap Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		46.41
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,574,000
NYMEX Oil Swap Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		46.44
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,444,000
NYMEX Oil Swap Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		46.66
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,340,000
NYMEX Oil Swap Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		46.35
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,254,000
NYMEX Oil Swap Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		5,612,000
NYMEX Oil Collar Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Floor Price		45.00
Derivative, Cap Price		54.17
Derivative, Nonmonetary Notional Amount, Volume | bbl		704,000
NYMEX Oil Collar Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Floor Price		45.00
Derivative, Cap Price		54.10
Derivative, Nonmonetary Notional Amount, Volume | bbl		636,000
NYMEX Oil Collar Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Floor Price		45.00
Derivative, Cap Price		54.05
Derivative, Nonmonetary Notional Amount, Volume | bbl		583,000
NYMEX Oil Collar Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Floor Price		45.00
Derivative, Cap Price		54.01
Derivative, Nonmonetary Notional Amount, Volume | bbl		540,000
NYMEX Oil Collar Contract 2018 [Member]
Derivative Financial Instruments
Derivative, Floor Price		50.00
Derivative, Cap Price		59.24
Derivative, Nonmonetary Notional Amount, Volume | bbl		2,312,000
NYMEX Oil Collar Contract 2019 [Member]
Derivative Financial Instruments
Derivative, Floor Price		50.00
Derivative, Cap Price		61.15
Derivative, Nonmonetary Notional Amount, Volume | bbl		943,000
NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		5,718,000
Gas Swaps Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU		29,420,000
Weighted- Average Contract Price | $ / EnergyContent		3.76
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	0
Derivative, Swap Type, Average Fixed Price, Purchased Volumes | $ / EnergyContent		0.00
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU		29,420,000
Gas Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU		26,205,000
Weighted- Average Contract Price | $ / EnergyContent		3.98
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	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, Nonmonetary Notional Amount, Energy Measure | MMBTU		23,657,000
Weighted- Average Contract Price | $ / EnergyContent		4.01
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	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, Nonmonetary Notional Amount, Energy Measure | MMBTU		22,001,000
Weighted- Average Contract Price | $ / EnergyContent		3.98
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	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, Nonmonetary Notional Amount, Energy Measure | MMBTU		63,166,000
Weighted- Average Contract Price | $ / EnergyContent		3.68
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	(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		32,560,000
Gas Swaps Contract 2019 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU		27,743,000
Weighted- Average Contract Price | $ / EnergyContent		4.20
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1]	(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		3,328,000
Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | MMBTU	[2]	192,192,000
Derivative, Nonmonetary Notional Amount, Energy Measure, Purchased Volumes | MMBTU	[1],[2]	(55,021,000)
Derivative, Nonmonetary Notional Amount, Energy Measure, Net of Purchased Volumes | MMBTU	[2]	137,171,000
Gas Swaps Contract 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price | $ / EnergyContent		4.43
Derivative, Nonmonetary Notional Amount, Energy Measure, Sold Volumes | MMBTU		38,600,000
IF El Paso Permian [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps		3.00%
IF HSC [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps		94.00%
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 First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		8.63
Derivative, Nonmonetary Notional Amount, Volume | bbl		847,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		8.86
Derivative, Nonmonetary Notional Amount, Volume | bbl		787,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		9.14
Derivative, Nonmonetary Notional Amount, Volume | bbl		736,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		9.10
Derivative, Nonmonetary Notional Amount, Volume | bbl		692,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		10.18
Derivative, Nonmonetary Notional Amount, Volume | bbl		2,434,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2019 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		11.95
Derivative, Nonmonetary Notional Amount, Volume | bbl		2,176,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract 2020 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		11.13
Derivative, Nonmonetary Notional Amount, Volume | bbl		539,000
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		8,211,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		21.90
Derivative, Nonmonetary Notional Amount, Volume | bbl		692,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		21.90
Derivative, Nonmonetary Notional Amount, Volume | bbl		634,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		21.91
Derivative, Nonmonetary Notional Amount, Volume | bbl		588,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		21.91
Derivative, Nonmonetary Notional Amount, Volume | bbl		550,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		22.86
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,442,000
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		3,906,000
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		30.69
Derivative, Nonmonetary Notional Amount, Volume | bbl		122,000
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		30.69
Derivative, Nonmonetary Notional Amount, Volume | bbl		112,000
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		30.70
Derivative, Nonmonetary Notional Amount, Volume | bbl		104,000
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		30.70
Derivative, Nonmonetary Notional Amount, Volume | bbl		98,000
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		436,000
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		31.12
Derivative, Nonmonetary Notional Amount, Volume | bbl		94,000
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		31.12
Derivative, Nonmonetary Notional Amount, Volume | bbl		86,000
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		31.12
Derivative, Nonmonetary Notional Amount, Volume | bbl		80,000
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		31.12
Derivative, Nonmonetary Notional Amount, Volume | bbl		74,000
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		334,000
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract First Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		47.54
Derivative, Nonmonetary Notional Amount, Volume | bbl		156,000
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		47.56
Derivative, Nonmonetary Notional Amount, Volume | bbl		143,000
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		47.59
Derivative, Nonmonetary Notional Amount, Volume | bbl		133,000
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		47.61
Derivative, Nonmonetary Notional Amount, Volume | bbl		124,000
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2019 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2020 [Member]
Derivative Financial Instruments
Weighted- Average Contract Price		0.00
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		556,000
Subsequent Event [Member] | NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Floor Price			50.00
Derivative, Nonmonetary Notional Amount, Volume | bbl			2,700,000
Subsequent Event [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl			1,100,000
Subsequent Event [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl			3,700,000
Minimum [Member] | Subsequent Event [Member] | NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Cap Price			57.00
Minimum [Member] | Subsequent Event [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Swap Type, Fixed Price			35.07
Minimum [Member] | Subsequent Event [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Weighted Average Differential to WTI			(1.23)
Maximum [Member] | Subsequent Event [Member] | NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Cap Price			58.40
Maximum [Member] | Subsequent Event [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Swap Type, Fixed Price			49.88
Maximum [Member] | Subsequent Event [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Weighted Average Differential to WTI			(1.45)

[1] 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 cash or other consideration was included as part of the restructuring.

[2] Total net volumes of natural gas swaps are comprised of IF El Paso Permian (3%), IF HSC (94%), and IF NNG Ventura (3%).