Consolidated Statements of Changes in Members' Capital (unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Members' capital, beginning balance			$ 169,981,297	$ 169,187,110
Subscriptions			13,384,887	56,923,993
Redemptions			(44,513,968)	(17,117,926)
Net loss	(2,208,566)	(3,809,956)	(7,846,716)	(14,239,210)
Members' capital, ending balance	131,005,500	194,753,967	131,005,500	194,753,967
Blended Strategies Portfolio [Member]
Members' capital, beginning balance			146,634,313	147,900,169
Subscriptions			12,785,608	42,293,399
Redemptions			(39,162,869)	(10,587,791)
Net loss			(6,907,646)	(9,837,887)
Members' capital, ending balance	113,349,406	169,767,890	113,349,406	169,767,890
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital, beginning balance			119,087,637	121,701,356
Members' capital, beginning balance (in units)			966,888.461	875,825.668
Subscriptions			10,894,754	33,408,396
Subscriptions (in units)			88,488.116	242,552.526
Redemptions			(31,828,251)	(7,879,927)
Redemptions (in units)			(262,085.920)	(58,046.780)
Net loss			(5,415,553)	(7,711,265)
Members' capital, ending balance	92,738,587	139,518,560	92,738,587	139,518,560
Members' capital, ending balance (in units)	793,290.657	1,060,331.414	793,290.657	1,060,331.414
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital, beginning balance			27,546,676	26,198,813
Members' capital, beginning balance (in units)			278,890.248	230,452.833
Subscriptions			1,890,854	8,885,003
Subscriptions (in units)			19,176.245	79,224.471
Redemptions			(7,334,618)	(2,707,864)
Redemptions (in units)			(74,885.757)	(24,457.680)
Net loss			(1,492,093)	(2,126,622)
Members' capital, ending balance	20,610,819	30,249,330	20,610,819	30,249,330
Members' capital, ending balance (in units)	223,180.736	285,219.624	223,180.736	285,219.624
Systematic Strategies Portfolio [Member]
Members' capital, beginning balance			23,346,984	21,286,941
Subscriptions			599,279	14,630,594
Redemptions			(5,351,099)	(6,530,135)
Net loss			(939,070)	(4,401,323)
Members' capital, ending balance	17,656,094	24,986,077	17,656,094	24,986,077
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital, beginning balance			9,117,153	12,648,247
Members' capital, beginning balance (in units)			112,079.324	122,899.506
Subscriptions			363,279	4,369,009
Subscriptions (in units)			4,452.995	43,311.027
Redemptions			(2,152,721)	(5,281,272)
Redemptions (in units)			(26,515.357)	(58,207.379)
Net loss			(307,289)	(2,082,580)
Members' capital, ending balance	7,020,422	9,653,404	7,020,422	9,653,404
Members' capital, ending balance (in units)	90,016.962	108,003.154	90,016.962	108,003.154
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital, beginning balance			14,229,831	8,638,694
Members' capital, beginning balance (in units)			184,238.954	86,626.635
Subscriptions			236,000	10,261,585
Subscriptions (in units)			3,074.637	106,334.600
Redemptions			(3,198,378)	(1,248,863)
Redemptions (in units)			(41,507.139)	(13,202.894)
Net loss			(631,781)	(2,318,743)
Members' capital, ending balance	$ 10,635,672	$ 15,332,673	$ 10,635,672	$ 15,332,673
Members' capital, ending balance (in units)	145,806.452	179,758.341	145,806.452	179,758.341