Consolidated Statement of Changes in Unitholders' Capital (USD $)	9 Months Ended
	Sep. 30, 2011
Beginning Balances	$ 56,035,898
Net income (loss)	(902,842)
Ending Balances	42,343,770
Trading
Beginning Balances (in units)	515,377
Unitholders' contributions (in units)	6,040
Unitholders' redemptions (in units)	(139,524)
Ending Balances (in units)	381,893
Beginning Balances	51,921,871
Net income (loss)	(2,289,983)
Unitholders' contributions	602,000
Unitholders' redemptions	(13,391,286)
Ending Balances	36,842,602
Trading | Beneficial owners | Class A
Beginning Balances (in units)	490,278
Unitholders' contributions (in units)	3,974
Unitholders' redemptions (in units)	(126,036)
Ending Balances (in units)	368,216
Beginning Balances	49,340,822
Net income (loss)	(2,151,381)
Unitholders' contributions	392,000
Unitholders' redemptions	(12,127,373)
Ending Balances	35,454,068
Trading | Beneficial owners | Class B
Beginning Balances (in units)	13,420
Unitholders' contributions (in units)	2,066
Unitholders' redemptions (in units)	(2,344)
Ending Balances (in units)	13,142
Beginning Balances	1,405,692
Net income (loss)	(41,585)
Unitholders' contributions	210,000
Unitholders' redemptions	(237,086)
Ending Balances	1,337,021
Trading | Managing owner | Class A
Beginning Balances (in units)	11,679
Unitholders' redemptions (in units)	(11,144)
Ending Balances (in units)	535
Beginning Balances	1,175,357
Net income (loss)	(97,017)
Unitholders' redemptions	(1,026,827)
Ending Balances	51,513
Trading | Class A
Net Asset Value Per Unit-Beginning Balance	$ 100.64
Net change per unit	$ (4.35)
Net Asset Value Per Unit-Ending Balance	$ 96.29
Trading | Class B
Net Asset Value Per Unit-Beginning Balance	$ 104.75
Net change per unit	$ (3.01)
Net Asset Value Per Unit-Ending Balance	$ 101.74
LLC equity/Non-Trading
Beginning Balances (in units)	2,273,288
Ending Balances (in units)	2,273,288
Beginning Balances	4,114,027
Net income (loss)	1,387,141
Ending Balances	5,501,168
Net Asset Value Per Unit-Beginning Balance	$ 1.81
Net change per unit	$ 0.61
Net Asset Value Per Unit-Ending Balance	$ 2.42
LLC equity/Non-Trading | Participating owners
Beginning Balances (in units)	407,463
Unitholders' redemptions (in units)	(87,094)
Ending Balances (in units)	320,369
Beginning Balances	737,509
Net income (loss)	196,205
Unitholders' redemptions	(158,421)
Ending Balances	775,293
LLC equity/Non-Trading | Nonparticipating owners
Beginning Balances (in units)	1,865,825
Unitholders' redemptions (in units)	87,094
Ending Balances (in units)	1,952,919
Beginning Balances	3,376,518
Net income (loss)	1,190,936
Unitholders' redemptions	158,421
Ending Balances	$ 4,725,875