Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Commodity derivatives (Details)

v3.10.0.1
Derivative Instruments - Commodity derivatives (Details) - Swaps
Jun. 30, 2018
bbl / d
MMBTU / d
$ / bbl
$ / gal
$ / MMBTU
Natural gas | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 2,002,500
Natural gas | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 2,002,500
Natural gas | NYMEX | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 2,002,500
Weighted average index price | $ / MMBTU 3.45
Natural gas | NYMEX | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 2,002,500
Weighted average index price | $ / MMBTU 3.53
Natural gas | NYMEX | Year ending December 31, 2019  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 2,330,000
Weighted average index price | $ / MMBTU 3.50
Natural gas | NYMEX | Year ending December 31, 2020  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 1,417,500
Weighted average index price | $ / MMBTU 3.25
Natural gas | NYMEX | Year Ending December 31, 2021  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 710,000
Weighted average index price | $ / MMBTU 3.00
Natural gas | NYMEX | Year ending December 31, 2022  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 850,000
Weighted average index price | $ / MMBTU 3.00
Natural gas | NYMEX | Year ending December 31, 2023  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | MMBTU / d 90,000
Weighted average index price | $ / MMBTU 2.91
Natural gas | Mont Belvieu-Propane | Three months ending September 30, 2018  
Derivative Instruments  
Weighted average index price | $ / MMBTU 0.76
Natural gas | WTI-NYMEX member | Three months ending September 30, 2018  
Derivative Instruments  
Weighted average index price | $ / MMBTU 56.99
Natural gas liquids | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 26,000
Natural gas liquids | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 26,000
Natural gas liquids | Mont Belvieu-Propane | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 26,000
Propane | Mont Belvieu-Propane | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 26,000
Weighted average index price | $ / gal 0.77
Oil | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 6,000
Oil | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 6,000
Oil | WTI-NYMEX member | Three months ending September 30, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 6,000
Oil | WTI-NYMEX member | Three months ending December 31, 2018  
Derivative Instruments  
Notional amount (MMBtu/Bbls per day) | bbl / d 6,000
Weighted average index price | $ / bbl 56.99