Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Derivative [Line Items]

Fair Value of Derivative Instruments [Table Text Block]

		Fair Value
Derivatives in Cash Flow Hedging Relationships	Balance Sheet Location	June 30, 2012
Derivative Commodity Contracts	Current Assets	$        6,800
	Long-Term Assets	35,600
	Current liabilities	—
	Long-term liabilities	—
	Total	$      42,400

Effects of Derivative Instruments on Statements of Operations [Table Text Block]

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2012	2011	2012	2011
(Loss) Gain recognized in accumulated OCI	$     (3,600)	$              —	$    (3,600)	$         24,100
Gain reclassified from accumulated OCI into income	$    19,300	$      63,100	$   78,200	$       134,800

Gross Fair Values of Receivable and Payable Affiliate Balances [Table Text Block]

	Gross Amounts	Gross Amounts	Net Amount of Assets
	of Recognized	Offset in the	Presented in the
	Assets	Balance Sheets	Balance Sheets
Offsetting Derivative Assets
As of June 30, 2012
Accounts receivable monetized gains-affiliate	$                           190,000	$                           (9,400)	$                                          180,600
Long-term accounts receivable monetized gains-affiliate	87,000	(36,500)	50,500
Total	$                           277,000	$                           (45,900)	$                                          231,100
As of December 31, 2011
Accounts receivable monetized gains-affiliate	$                           248,500	$                           —	$                                          248,500
Long-term accounts receivable monetized gains-affiliate	163,100	—	163,100
Total	$                           411,600	$                           —	$                                          411,600
	Gross Amounts	Gross Amounts	Net Amount of Liabilities
	of Recognized	Offset in the	Presented in the
	Liabilities	Balance Sheets	Balance Sheets
Offsetting Derivative Liabilities
As of June 30, 2012
Put premiums payable-affiliate	$                          (9,400)	$                          9,400	$                                          —
Long-term put premiums payable-affiliate	(36,500)	36,500	—
Total	$                          (45,900)	$                          45,900	$                                          —
As of December 31, 2011
Put premiums payable-affiliate	$                          —	$                          —	$                                          —
Long-term put premiums payable-affiliate	—	—	—
Total	$                          —	$                          —	$                                          —

Natural Gas Put Options [Member]

Derivative [Line Items]

Commodity Derivatives [Table Text Block]

Natural Gas Put Options

Production
Period Ending		Average	Fair Value
December 31,	Volumes	Strike	Asset  (2)
	(mmbtu) (1)	(per mmbtu) (1)
2012	14,522	$                        2.80	$                     2,515
2013	21,782	3.45	8,718
2014	18,152	3.80	9,408
2015	14,522	4.00	9,860
2016	14,522	4.15	11,881
			$                  42,382

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(1)"Mmbtu" represents million British Thermal Units.

(2)Fair value based on forward NYMEX natural gas prices, as applicable.