Certain Relationships and Related Party Transactions (Narrative) (Details) - MGP and Affiliates	6 Months Ended
	Jun. 30, 2016 $ / mo
Administrative costs
Related Party Transaction [Line Items]
Monthly Administrative Costs Per Well	75
Supervision fees
Related Party Transaction [Line Items]
Monthly Supervision Fees Per Well	376
Transportation fees
Related Party Transaction [Line Items]
Transportation Fees Rate As Percentage Of Natural Gas Sales Price	13.00%