Statements Of Comprehensive (Loss) Income (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Statements Of Comprehensive (Loss) Income [Abstract]
Net (loss) income	$ (51,830,000)	$ 247,500
Other comprehensive income (loss):
Changes in fair value of derivative instruments accounted for as cash flow hedges: Unrealized holding gain on hedging contracts	131,500	452,800
Changes in fair value of derivative instruments accounted for as cash flow hedges: MGP portion of non-cash loss on hedge instruments	0	54,600
Changes in fair value of derivative instruments accounted for as cash flow hedges: Difference in estimated hedge gains receivable	(891,500)	(175,300)
Less: reclassification adjustment for gains realized in net	(1,612,000)	(4,657,200)
Total other comprehensive loss	(2,372,000)	(4,325,100)
Comprehensive loss	$ (54,202,000)	$ (4,077,600)