Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Purchased options on futures contracts, premiums paid	$ 1,001,094	$ 33,376
Fixed income securities, cost	14,710,463	21,993,704
Options written on futures contracts, premiums received	$ 819,660	$ 14,375
Trading [Member]
Unitholders' capital, units outstanding Shares	305,669	369,090
LLC Equity/Non-Trading [Member]
Unitholders' capital, units outstanding Shares	2,273,288	2,273,288
Participating Owners [Member] | LLC Equity/Non-Trading [Member]
Unitholders' capital, units outstanding Shares	254,976	306,807
Nonparticipating Owners [Member] | LLC Equity/Non-Trading [Member]
Unitholders' capital, units outstanding Shares	2,018,312	1,966,481
Class A [Member] | Beneficial Owners [Member] | Trading [Member]
Unitholders' capital, units outstanding Shares	295,067	355,858
Class A [Member] | Managing Owner [Member] | Trading [Member]
Unitholders' capital, units outstanding Shares	535	535
Class B [Member] | Beneficial Owners [Member] | Trading [Member]
Unitholders' capital, units outstanding Shares	10,067	12,697