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
Derivative, Nonmonetary Notional Amount, Volume				1,706
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				345
Derivative, Swap Type, Average Fixed Price | $ / Barrels				26.04
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				345
Subsequent Event [Member] | OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				87
Derivative, Swap Type, Average Fixed Price | $ / Barrels				31.71
Subsequent Event [Member] | OPIS Normal Butane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				87
Subsequent Event [Member] | OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				69
Derivative, Swap Type, Average Fixed Price | $ / Barrels				30.35
Subsequent Event [Member] | OPIS Isobutane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				69
Subsequent Event [Member] | OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter 2017 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				0
Derivative, Swap Type, Average Fixed Price | $ / Barrels				0.00
Subsequent Event [Member] | OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contract 2018 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				116
Derivative, Swap Type, Average Fixed Price | $ / Barrels				47.36
Subsequent Event [Member] | OPIS Natural Gasoline Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume				116

[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.