Supplemental Gas and Oil Information (Unaudited) (Changes In Proved Reserve Quantities) (Details)	12 Months Ended
	Dec. 31, 2015 Mcf bbl		Dec. 31, 2014 Mcf bbl
Gas (Mcf)
Reserve Quantities [Line Items]
Balance | Mcf	1,340,900		1,628,400
Revisions | Mcf	(1,064,300)	[1]	(61,900)	[2]
Production | Mcf	(185,400)		(225,600)
Balance | Mcf	91,200	[3]	1,340,900
Oil (Bbls)
Reserve Quantities [Line Items]
Balance | bbl	5,500		5,700
Revisions | bbl	(4,300)	[1]	400	[2]
Production | bbl	(600)		(600)
Balance | bbl	600	[3]	5,500

[1] The downward revision in natural gas forecasts is primarily due to forecast adjustments in order to reflect actual production; the downward revision in oil forecasts is primarily due to a decrease in the SEC base pricing from the prior year, resulting in a shorter economic life.

[2] The downward revision in natural gas forecasts is primarily due to forecasts adjustments in order to reflect actual production. The upward revision in oil forecasts is primarily due to forecast adjustments in order to better reflect actual production.

[3] We have experienced significant downward revisions of our natural gas and oil reserves volumes and values in 2015 due to the recent significant declines in commodity prices. The proved reserves quantities and future net cash flows were estimated under the SEC’s standardized measure using an unweighted 12-month average pricing based on the gas and oil prices on the first day of each month during the year ended December 31, 2015, including adjustments related to regional price differentials and energy content. The SEC’s standardized measure of reserve quantities and discounted future net cash flows may not represent the fair market value of the Partnership’s gas and oil equivalent reserves due to anticipated future changes in gas and oil commodity prices. Accordingly, such information should not serve as a basis in making any judgment on the potential value of recoverable reserves or in estimating future results of operations.