Commodity Price Risk Activities - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017 bbl / d MMBTU / d MMBTU DeliveryObligation bbl
Derivative [Line Items]
Number of open physical obligations | DeliveryObligation	0
Derivative Contracts, Remainder of 2017
Derivative [Line Items]
Derivative contracts, aggregate volume | bbl	364,600
Derivative contracts, aggregate volume per day | bbl / d	3,963
Derivative Contracts, 2018
Derivative [Line Items]
Derivative contracts, aggregate volume | bbl	1,713,500
Derivative contracts, aggregate volume per day | bbl / d	4,695
Derivative Contracts, 2019
Derivative [Line Items]
Derivative contracts, aggregate volume | bbl	1,069,600
Derivative contracts, aggregate volume per day | bbl / d	2,930
Natural Gas Derivative Contracts, 2017
Derivative [Line Items]
Derivative contracts, aggregate energy | MMBTU	644,000
Derivative contracts, aggregate volume per day | MMBTU / d	7,000
Derivative Contracts, Thru June 2020
Derivative [Line Items]
Derivative contracts, aggregate volume | bbl	203,600
Derivative contracts, aggregate volume per day | bbl / d	1,119
Natural Gas Derivative Contracts, 2018
Derivative [Line Items]
Derivative contracts, aggregate energy | MMBTU	1,825,000
Derivative contracts, aggregate volume per day | MMBTU / d	5,000