Consolidated Statements of Changes in Members' Capital (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Members' capital, beginning balance	$ 76,659,546	$ 93,947,400
Subscriptions	11,652,795	2,467,801
Redemptions	(20,262,759)	(28,314,081)
Net income	10,496,665	8,558,426
Members' capital, ending balance	78,546,247	76,659,546
Class 0 Units [Member]
Members' capital, beginning balance	58,310,022	75,558,523
Members' capital, beginning balance (in units)	456,544.588	657,725.570
Subscriptions	8,734,000	705,000
Subscriptions (in units)	68,503.746	5,806.281
Redemptions	(16,433,428)	(24,940,235)
Redemptions (in units)	(134,740.565)	(206,987.263)
Net income	7,690,247	6,986,734
Members' capital, ending balance	58,300,841	58,310,022
Members' capital, ending balance (in units)	390,307.769	456,544.588
Class 2 Units [Member]
Members' capital, beginning balance	18,349,524	18,388,877
Members' capital, beginning balance (in units)	186,461.512	203,657.512
Subscriptions	2,918,795	1,762,801
Subscriptions (in units)	31,364.710	18,904.473
Redemptions	(3,829,331)	(3,373,846)
Redemptions (in units)	(39,580.431)	(36,100.473)
Net income	2,806,418	1,571,692
Members' capital, ending balance	$ 20,245,406	$ 18,349,524
Members' capital, ending balance (in units)	178,245.791	186,461.512