Consolidated Statements of Changes in Members' Capital (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Members' capital, beginning balance			$ 93,947,400	$ 146,634,313
Subscriptions			1,939,801	12,785,608
Redemptions			(20,784,548)	(39,162,869)
Net income (loss)	(3,222,545)	(2,162,967)	1,681,207	(6,907,646)
Members' capital, ending balance	76,783,860	113,349,406	76,783,860	113,349,406
Class 0 Units [Member]
Members' capital, beginning balance			75,558,523	119,087,637
Members' capital, beginning balance (in units)			657,725.570	966,888.461
Subscriptions			695,000	10,894,754
Subscriptions (in units)			5,721.256	88,488.116
Redemptions			(18,448,585)	(31,828,251)
Redemptions (in units)			(153,966.769)	(262,085.920)
Net income (loss)			1,649,549	(5,415,553)
Members' capital, ending balance	59,454,487	92,738,587	59,454,487	92,738,587
Members' capital, ending balance (in units)	509,480.057	793,290.657	509,480.057	793,290.657
Class 2 Units [Member]
Members' capital, beginning balance			18,388,877	27,546,676
Members' capital, beginning balance (in units)			203,657.512	278,890.248
Subscriptions			1,244,801	1,890,854
Subscriptions (in units)			13,212.727	19,176.245
Redemptions			(2,335,963)	(7,334,618)
Redemptions (in units)			(25,111.988)	(74,885.757)
Net income (loss)			31,658	(1,492,093)
Members' capital, ending balance	$ 17,329,373	$ 20,610,819	$ 17,329,373	$ 20,610,819
Members' capital, ending balance (in units)	191,758.251	223,180.736	191,758.251	223,180.736