FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Condensed Statements of Operations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	$ (12,161,650)	$ (7,653,100)	$ (9,574,510)
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income	7,676,740	(6,408,260)	(3,837,730)
Commodity Contracts | Futures | Realized gain (loss) on closed positions
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	(12,161,650)	(7,653,100)	(9,574,510)
Commodity Contracts | Futures | Change in unrealized gain on open positions
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income	$ 7,676,740	$ (6,408,260)	$ (3,837,730)