Commodity Price Risk Activities (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Schedule of Derivative Transactions Outstanding

As of December 31, 2017, the following derivative transactions were outstanding:

Instrument	Total Volume	Settlement Period	Fixed Price
Oil – WTI Fixed Price Swap	365,000 Bbl	January – December 2018	$	54.18
Oil – WTI Fixed Price Swap	182,500 Bbl	January – December 2018		55.65
Oil – WTI Fixed Price Swap	182,500 Bbl	January – December 2018		55.50
Oil – WTI Fixed Price Swap	292,000 Bbl	January – December 2018		47.10
Oil – WTI Fixed Price Swap	509,000 Bbl	January – December 2018		50.17
Oil – WTI Fixed Price Swap	508,900 Bbl	January – December 2019		50.40
Oil – WTI Fixed Price Swap	560,700 Bbl	January – December 2019		48.04
Oil – WTI Fixed Price Swap	401,500 Bbl	January – December 2019		50.90
Oil – WTI Fixed Price Swap	203,600 Bbl	January – June 2020		48.90
Natural Gas – Henry Hub NYMEX Fixed Price Swap	1,825,000 MMBtu	January – December 2018		3.09

Instrument	Total Volume	Settlement Period	Puts		Calls
Oil – 2 Way Collar	182,500 Bbl	January – December 2018	$	50.00	$	59.45