STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (NET ASSET VALUE) (Unaudited) (USD $)	General Partner [Member]	Limited Partner [Member]	Total
Balance at Dec. 31, 2009	$ 15,893,851	$ 1,692,597,767	$ 1,708,491,618
Balance (in units) at Dec. 31, 2009	6,637.982	706,905.488	713,543.470
Net income (loss)	(866,639)	(90,237,432)	(91,104,071)
Redemptions	(34,815)	(242,073,954)	(242,108,769)
Redemptions (in units)	(14.821)	(106,023.132)	(106,037.953)
Offering costs	(12,463)	(1,242,811)	(1,255,274)
Balance at Jun. 30, 2010	14,979,934	1,359,043,570	1,374,023,504
Balance (in units) at Jun. 30, 2010	6,623.161	600,882.356	607,505.517
Balance at Dec. 31, 2010	17,239,400	1,400,606,228	1,417,845,628
Balance (in units) at Dec. 31, 2010	6,602.933	536,451.595	543,054.528
Net income (loss)	(675,216)	(87,687,584)	(88,362,800)
Redemptions	(6,000,000)	(110,713,407)	(116,713,407)
Redemptions (in units)	(2,272.331)	(43,571.786)	(45,844.117)
Offering costs	(14,318)	(1,488,918)	(1,503,236)
Balance at Jun. 30, 2011	$ 10,549,866	$ 1,200,716,319	$ 1,211,266,185
Balance (in units) at Jun. 30, 2011	4,330.602	492,879.809	497,210.411