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Consolidated Statements of Financial Condition (Parenthetical) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Purchased options on futures contracts, premiums paid $ 33,376  
Fixed income securities, cost 19,978,783 21,993,704
Options written on futures contracts, premiums received $ 34,125 $ 14,375
Trading
   
Unitholders' capital, units outstanding 322,003 369,090
LLC equity/Non-Trading
   
Unitholders' capital, units outstanding 2,273,288 2,273,288
Participating owners | LLC equity/Non-Trading
   
Unitholders' capital, units outstanding 268,424 306,807
Nonparticipating owners | LLC equity/Non-Trading
   
Unitholders' capital, units outstanding 2,004,864 1,966,481
Class A | Beneficial owners | Trading
   
Unitholders' capital, units outstanding 311,056 355,858
Class A | Managing owner | Trading
   
Unitholders' capital, units outstanding 535 535
Class B | Beneficial owners | Trading
   
Unitholders' capital, units outstanding 10,412 12,697