STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (Unaudited) (USD $)	Total	Limited Partners [Member]	General Partner [Member]
Balance at Dec. 31, 2009	$ 464,645,047	$ 459,902,047	$ 4,743,000
Balance (in units) at Dec. 31, 2009	12,241,800.475
Net Loss	(52,676,086)	(52,141,069)	(535,017)
Redemptions	(24,116,879)	(23,808,181)	(308,698)
Redemptions (in units)	(689,867.698)
Balance at Jun. 30, 2010	387,852,082	383,952,797	3,899,285
Balance (in units) at Jun. 30, 2010	11,551,932.777
Balance at Dec. 31, 2010	409,250,860	404,921,242	4,329,618
Balance (in units) at Dec. 31, 2010	10,760,255.711
Net Loss	(41,156,688)	(40,722,391)	(434,297)
Redemptions	(29,712,322)	(29,312,344)	(399,978)
Redemptions (in units)	(815,247.904)
Balance at Jun. 30, 2011	$ 338,381,850	$ 334,886,507	$ 3,495,343
Balance (in units) at Jun. 30, 2011	9,945,007.807