Derivative Instruments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Fair Value Asset/(Liability)	$ 15,100
Gain Recognized On Settled Commodity Contracts	71,300	254,000
Gain (Loss) on Fair Value Hedge Ineffectiveness, Net	0	0
Affiliate Balances, Offsetting Derivative Assets, Gross Amounts Of Recognized Assets	82,800	210,700
Affiliate Balances, Offsetting Derivative Liabilities, Gross Amounts Of Recognized Liabilities	22,500
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,900)	0
Distributions to Managing General Partner	0	82,400
Net production revenues	333,100	711,500
Net Deferred Gain To Be Reclassified Into Net Income Over The Next Twelve Months	(2,800)
Net Deferred Gain To Be Reclassified Into Net Income In Later Periods	(5,100)
Net Deferred Gain [Member] | Net Amount of Cash Received for Monetized Gains and Reversal of Prior Period Gains Recognized [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,900)
Unrealized Gain [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(65,400)
Accumulated Other Comprehensive Income (Loss), Prior Periods, Net Of Tax		(17,900)
Noncash Distribution [Member] | Net Amount of Cash Received for Monetized Gains and Reversal of Prior Period Gains Recognized [Member]
Derivative [Line Items]
Distributions to Managing General Partner		82,400
Accounts Receivable Monetized Gains Affiliate [Member]
Derivative [Line Items]
Affiliate Balances, Offsetting Derivative Assets, Gross Amounts Of Recognized Assets	69,000	127,400
Long Term Accounts Receivable Monetized [Member]
Derivative [Line Items]
Affiliate Balances, Offsetting Derivative Assets, Gross Amounts Of Recognized Assets	13,800	83,300
Put Premiums Payable Affiliate [Member]
Derivative [Line Items]
Affiliate Balances, Offsetting Derivative Liabilities, Gross Amounts Of Recognized Liabilities	5,600
Long Term Put Premiums Payable Affiliate [Member]
Derivative [Line Items]
Affiliate Balances, Offsetting Derivative Liabilities, Gross Amounts Of Recognized Liabilities	$ 16,900