Derivatives Derivatives (Schedule of Subsequent Derivatives Outstanding (Details) - Jan'17 - Oct'17 [Member] - Natural Gas [Member] - Collar [Member] - IF - NYMEX (HH) [Member]	1 Months Ended	6 Months Ended
	Aug. 04, 2016 MMBTU $ / Unit	Jun. 30, 2016 MMBTU $ / Unit
Derivative [Line Items]
Hedged volume (MMBtu/day) | MMBTU		10,000
Floor Price		2.75
Cap Price		2.95
Subsequent Event [Member]
Derivative [Line Items]
Hedged volume (MMBtu/day) | MMBTU	10,000
Floor Price	3.00
Cap Price	3.24