Condensed Statements of Changes in Members' Capital (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Members’ capital start of period			$ 68,415,986	$ 16,200,829
Members’ capital start of period (in Shares)			61,814.26	15,160.08
Member subscriptions			25,717,291	25,079,658
Member subscriptions (in Shares)			23,292.44	22,949.54
Member redemptions			(2,611,186)	(413,875)
Member redemptions (in Shares)			(2,438.00)	(378.91)
Net investment income (loss)	(850,529)	(360,490)	(1,636,311)	(674,339)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041	(2,863,497)	(1,024,129)	(3,319,643)	(464,428)
Members’ capital end of period	86,566,137	39,727,845	86,566,137	39,727,845
Members’ capital end of period (in Shares)	82,668.70	37,730.71	82,668.70	37,730.71
B 0 Members [Member] \| WC Diversified Series [Member]
Members’ capital start of period			39,780,045	7,562,143
Members’ capital start of period (in Shares)			35,445.16	7,030.08
Member subscriptions			18,699,813	14,542,679
Member subscriptions (in Shares)			16,752.75	13,239.24
Member redemptions			(878,189)	(371,760)
Member redemptions (in Shares)			(798.02)	(340.26)
Net investment income (loss)			(821,722)	(287,546)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(2,086,523)	(227,920)
Members’ capital end of period	54,693,424	21,217,596	54,693,424	21,217,596
Members’ capital end of period (in Shares)	51,399.89	19,929.06	51,399.89	19,929.06
Net asset value per unit start of period (in Dollars per Item)			1,122.299	1,075.684
Change in net asset value per unit (in Dollars per Item)			(58.222)	(11.028)
Net asset value per unit end of period (in Dollars per Item)	1,064.077	1,064.656	1,064.077	1,064.656
B 2 Members [Member] \| WC Diversified Series [Member]
Members’ capital start of period			28,625,081	8,628,060
Members’ capital start of period (in Shares)			26,359.10	8,120.00
Member subscriptions			7,017,478	10,536,979
Member subscriptions (in Shares)			6,539.69	9,710.30
Member redemptions			(1,732,997)	(42,115)
Member redemptions (in Shares)			(1,639.98)	(38.65)
Net investment income (loss)			(814,312)	(386,499)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(1,232,730)	(236,574)
Members’ capital end of period	31,862,520	18,499,851	31,862,520	18,499,851
Members’ capital end of period (in Shares)	31,258.81	17,791.65	31,258.81	17,791.65
Net asset value per unit start of period (in Dollars per Item)			1,085.966	1,062.568
Change in net asset value per unit (in Dollars per Item)			(66.653)	(22.763)
Net asset value per unit end of period (in Dollars per Item)	1,019.313	1,039.805	1,019.313	1,039.805
Sponsor B 2 [Member] \| WC Diversified Series [Member]
Members’ capital start of period			10,860	10,626
Members’ capital start of period (in Shares)			10.00	10.00
Net investment income (loss)			(277)	(294)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(390)	66
Members’ capital end of period	10,193	10,398	10,193	10,398
Members’ capital end of period (in Shares)	10.00	10.00	10.00	10.00
Net asset value per unit start of period (in Dollars per Item)			1,085.966	1,062.568
Change in net asset value per unit (in Dollars per Item)			(66.653)	(22.763)
Net asset value per unit end of period (in Dollars per Item)	1,019.313	1,039.805	1,019.313	1,039.805
WC Diversified Series [Member]
Members’ capital start of period			68,415,986	16,200,829
Members’ capital start of period (in Shares)			61,814.26	15,160.08
Member subscriptions			25,717,291	25,079,658
Member subscriptions (in Shares)			23,292.44	22,949.54
Member redemptions			(2,611,186)	(413,875)
Member redemptions (in Shares)			(2,438.00)	(378.91)
Net investment income (loss)			(1,636,311)	(674,339)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(3,319,643)	(464,428)
Members’ capital end of period	$ 86,566,137	$ 39,727,845	$ 86,566,137	$ 39,727,845
Members’ capital end of period (in Shares)	82,668.70	37,730.71	82,668.70	37,730.71

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