Commodity Price Risk Activities - Additional Information (Details)	1 Months Ended	6 Months Ended
	Jul. 31, 2018 $ / bbl bbl	Jun. 30, 2018 DeliveryObligation $ / bbl bbl
Derivative [Line Items]
Number of open physical obligations | DeliveryObligation		0
Oil -WTI Swaps January-December 2019
Derivative [Line Items]
Total Volume | bbl		4,930
Weighted Average Price - Swap | $ / bbl		51.21
Oil -WTI Swaps January-December 2020
Derivative [Line Items]
Total Volume | bbl		1,684
Weighted Average Price - Swap | $ / bbl		53.02
Subsequent Event | Oil -WTI Swaps January-December 2019
Derivative [Line Items]
Total Volume | bbl	182,500
Weighted Average Price - Swap | $ / bbl	65.20
Subsequent Event | Oil -WTI Swaps January-December 2020
Derivative [Line Items]
Total Volume | bbl	183,000
Weighted Average Price - Swap | $ / bbl	61.65