Statements of Changes in Partners' Capital (USD $)	Total	Limited Partners [Member]	Special Limited Partner [Member]	General Partner [Member]
Beginning Balance at Dec. 31, 2009	$ 282,292,123	$ 277,770,129	$ 1,303,118	$ 3,218,876
Redemptions of 2,871.0299, 4,862.4076 and 3,931.9621 Redeemable Units for the year 2010, 2011 and 2012 respectively	(29,872,324)	(29,872,324)
Redemptions of 49.7338, 24.1950 and 59.5110 General Partner unit equivalents for the year 2010, 2011 and 2012 respectively	(524,997)			(524,997)
Allocation of net income (loss)
Net income (loss)	(20,473,281)	(20,153,417)	(97,681)	(222,183)
Ending Balance at Dec. 31, 2010	231,421,521	227,744,388	1,205,437	2,471,696
Redemptions of 2,871.0299, 4,862.4076 and 3,931.9621 Redeemable Units for the year 2010, 2011 and 2012 respectively	(49,641,472)	(49,641,472)
Redemptions of 49.7338, 24.1950 and 59.5110 General Partner unit equivalents for the year 2010, 2011 and 2012 respectively	(250,000)			(250,000)
Allocation of net income (loss)
Net income (loss)	6,474,255	6,351,612	41,723	80,920
Ending Balance at Dec. 31, 2011	188,004,304	184,454,528	1,247,160	2,302,616
Redemptions of 2,871.0299, 4,862.4076 and 3,931.9621 Redeemable Units for the year 2010, 2011 and 2012 respectively	(40,442,418)	(40,442,418)
Redemptions of 49.7338, 24.1950 and 59.5110 General Partner unit equivalents for the year 2010, 2011 and 2012 respectively	(600,807)			(600,807)
Allocation of net income (loss)
Net income (loss)	(4,471,030)	(4,375,302)	(29,961)	(65,767)
Ending Balance at Dec. 31, 2012	$ 142,490,049	$ 139,636,808	$ 1,217,199	$ 1,636,042