Derivative Instruments (Details)	Dec. 31, 2015 bbl / d MMBTU / d $ / gal $ / MMBTU
TCOminusNYMEX | Year ending December 31, 2016 | Basis Differential Positions
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	290,000
Weighted average index price | $ / MMBTU	(0.42)
TCOminusNYMEX | Year ending December 31, 2017 | Basis Differential Positions
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	125,000
Weighted average index price | $ / MMBTU	(0.49)
Natural gas | NYMEXminusTCO | Year ending December 31, 2016 | Basis Differential Positions
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price | $ / MMBTU	0.26
Natural gas | NYMEXminusTCO | Year ending December 31, 2017 | Basis Differential Positions
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	125,000
Weighted average index price | $ / MMBTU	0.30
Swaps | Natural gas | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,612,500
Swaps | Natural gas | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,612,500
Swaps | Natural gas | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,612,500
Swaps | Natural gas | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,612,500
Swaps | Natural gas | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,860,000
Swaps | Natural gas | Year ending December 31, 2018
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	2,002,500
Swaps | Natural gas | TCO | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	60,000
Weighted average index price | $ / MMBTU	5.07
Swaps | Natural gas | TCO | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	60,000
Weighted average index price | $ / MMBTU	4.77
Swaps | Natural gas | TCO | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	60,000
Weighted average index price | $ / MMBTU	4.81
Swaps | Natural gas | TCO | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	60,000
Weighted average index price | $ / MMBTU	5.01
Swaps | Natural gas | Dominion South | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	272,500
Weighted average index price | $ / MMBTU	5.54
Swaps | Natural gas | Dominion South | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	272,500
Weighted average index price | $ / MMBTU	5.17
Swaps | Natural gas | Dominion South | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	272,500
Weighted average index price | $ / MMBTU	5.24
Swaps | Natural gas | Dominion South | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	272,500
Weighted average index price | $ / MMBTU	5.47
Swaps | Natural gas | NYMEX | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,110,000
Weighted average index price | $ / MMBTU	3.58
Swaps | Natural gas | NYMEX | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,110,000
Weighted average index price | $ / MMBTU	3.38
Swaps | Natural gas | NYMEX | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,110,000
Weighted average index price | $ / MMBTU	3.44
Swaps | Natural gas | NYMEX | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,110,000
Weighted average index price | $ / MMBTU	3.57
Swaps | Natural gas | NYMEX | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,370,000
Weighted average index price | $ / MMBTU	3.39
Swaps | Natural gas | NYMEX | Year ending December 31, 2018
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	2,002,500
Weighted average index price | $ / MMBTU	3.91
Swaps | Natural gas | NYMEX | Year ending December 31, 2019
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,960,000
Weighted average index price | $ / MMBTU	3.87
Swaps | Natural gas | NYMEX | Year ending December 31, 2020
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	1,287,500
Weighted average index price | $ / MMBTU	3.72
Swaps | Natural gas | NYMEX | Year Ending December 31, 2021
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	480,000
Weighted average index price | $ / MMBTU	3.48
Swaps | Natural gas | NYMEX | Year ending December 31, 2022
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	10,000
Weighted average index price | $ / MMBTU	3.30
Swaps | Natural gas | CGTLA | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price | $ / MMBTU	4.21
Swaps | Natural gas | CGTLA | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price | $ / MMBTU	3.94
Swaps | Natural gas | CGTLA | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price | $ / MMBTU	4.03
Swaps | Natural gas | CGTLA | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price | $ / MMBTU	4.20
Swaps | Natural gas | CGTLA | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	420,000
Weighted average index price | $ / MMBTU	4.27
Swaps | Natural gas | CCG | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day)	70,000
Weighted average index price | $ / MMBTU	4.57
Swaps | Propane | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Swaps | Propane | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Swaps | Propane | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Swaps | Propane | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Swaps | Propane | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	35,500
Swaps | Propane | Year ending December 31, 2018
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	2,000
Swaps | Propane | Mont Belvieu-TET | Three months ending March 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Weighted average index price | $ / gal	0.58
Swaps | Propane | Mont Belvieu-TET | Three months ending June 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Weighted average index price | $ / gal	0.57
Swaps | Propane | Mont Belvieu-TET | Three months ending September 30, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Weighted average index price | $ / gal	0.58
Swaps | Propane | Mont Belvieu-TET | Three months ending December 31, 2016
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	30,000
Weighted average index price | $ / gal	0.61
Swaps | Propane | Mont Belvieu-TET | Year ending December 31, 2017
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	35,500
Weighted average index price | $ / gal	0.43
Swaps | Propane | Mont Belvieu-TET | Year ending December 31, 2018
Derivative Instruments
Notional amount (MMBtu/Bbls per day) | bbl / d	2,000
Weighted average index price | $ / gal	0.65