Certain Relationships and Related Party Transactions (Narrative) (Details) - MGP and Affiliates	12 Months Ended
	Dec. 31, 2015 $ / 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	329
Transportation fees
Related Party Transaction [Line Items]
Transportation Fees Rate As Percentage Of Natural Gas Sales Price	13.00%