Derivative Instruments (Details) - Swap - Natural Gas:	6 Months Ended
	Jun. 30, 2017 MMBTU $ / shares
July - December 2017
Oil and gas contracts
Daily Volumes | MMBTU	30,000
Weighted Average Price | $ / shares	$ 3.22
October - December 2017
Oil and gas contracts
Daily Volumes | MMBTU	10,000
Weighted Average Price | $ / shares	$ 3.22
January - March 2018
Oil and gas contracts
Daily Volumes | MMBTU	35,000
Weighted Average Price | $ / shares	$ 3.24