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Consolidated Condensed Schedule of Investments - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 51.33% 54.41%
Investments Owned, cost $ 101,007,230 $ 116,001,074
Investments Owned, Fair Value 101,310,345 116,297,654
Open long contracts | Futures, Forward, and Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ 5,714,212 $ (376,403)
Percent of Partners' Capital (Net Asset Value) 2.89% (0.18%)
Open long contracts | Forward Contracts | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (195,686) $ 7,642
Percent of Partners' Capital (Net Asset Value) [1] (0.10%) 0.00%
Open long contracts | Futures Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 9,296,574 $ (1,552,145)
Percent of Partners' Capital (Net Asset Value) [1] 4.71% (0.73%)
Open long contracts | Futures Contracts | U.S. Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 4,454,752 $ (632,461)
Open long contracts | Futures Contracts | U.S. Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 33,737 $ (186,020)
Percent of Partners' Capital (Net Asset Value) [1] 0.02% (0.09%)
Open long contracts | Futures Contracts | U.S. Futures Positions | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 434,110 $ 97,771
Percent of Partners' Capital (Net Asset Value) [1] 0.22% 0.05%
Open long contracts | Futures Contracts | U.S. Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 131,537 $ 11,957
Percent of Partners' Capital (Net Asset Value) [1] 0.07% 0.01%
Open long contracts | Futures Contracts | U.S. Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 2,410,745 $ (407,958)
Percent of Partners' Capital (Net Asset Value) [1] 1.22% (0.19%)
Open long contracts | Futures Contracts | U.S. Futures Positions | Meats    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (67,605) $ (860)
Percent of Partners' Capital (Net Asset Value) [1] (0.03%) 0.00%
Open long contracts | Futures Contracts | U.S. Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 692,394 $ (29,400)
Percent of Partners' Capital (Net Asset Value) [1] 0.35% (0.01%)
Open long contracts | Futures Contracts | U.S. Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 210,304 $ (48,181)
Percent of Partners' Capital (Net Asset Value) [1] 0.11% (0.02%)
Open long contracts | Futures Contracts | U.S. Futures Positions | Stock indices and single stock futures    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 609,530 $ (69,770)
Percent of Partners' Capital (Net Asset Value) [1] 0.30% (0.03%)
Open long contracts | Futures Contracts | Foreign Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 4,841,822 $ (919,684)
Open long contracts | Futures Contracts | Foreign Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (3,404) $ 29,425
Percent of Partners' Capital (Net Asset Value) [1] 0.00% 0.01%
Open long contracts | Futures Contracts | Foreign Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (26,293)  
Percent of Partners' Capital (Net Asset Value) [1] (0.01%) 0.00%
Open long contracts | Futures Contracts | Foreign Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 3,197,845 $ (827,562)
Percent of Partners' Capital (Net Asset Value) [1] 1.62% (0.39%)
Open long contracts | Futures Contracts | Foreign Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 1,061,726 $ (110,937)
Percent of Partners' Capital (Net Asset Value) [1] 0.54% (0.05%)
Open long contracts | Futures Contracts | Foreign Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 16,366 $ 161
Percent of Partners' Capital (Net Asset Value) [1] 0.01% 0.00%
Open long contracts | Futures Contracts | Foreign Futures Positions | Stock indices    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 595,582 $ (10,771)
Percent of Partners' Capital (Net Asset Value) [1] 0.31% (0.01%)
Open long contracts | Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ (3,386,676)  
Percent of Partners' Capital (Net Asset Value) (1.72%)  
Open long contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating March 29, 2019    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ 114,970  
Percent of Partners' Capital (Net Asset Value) 0.05%  
Open long contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating July 1, 2020    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ (3,501,646) $ 1,168,100
Percent of Partners' Capital (Net Asset Value) (1.77%) 0.55%
Open short contracts | Futures, Forward, and Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ (266,127) $ 2,131,439
Percent of Partners' Capital (Net Asset Value) (0.13%) 1.00%
Open short contracts | Forward Contracts | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 919,456 $ (248,301)
Percent of Partners' Capital (Net Asset Value) [1] 0.47% (0.12%)
Open short contracts | Futures Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (1,185,583) $ 2,379,740
Percent of Partners' Capital (Net Asset Value) [1] (0.60%) 1.12%
Open short contracts | Futures Contracts | U.S. Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 327,617 $ 1,348,748
Open short contracts | Futures Contracts | U.S. Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 185,176 $ 660,432
Percent of Partners' Capital (Net Asset Value) [1] 0.09% 0.31%
Open short contracts | Futures Contracts | U.S. Futures Positions | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 556,317 $ 1,000,158
Percent of Partners' Capital (Net Asset Value) [1] 0.28% 0.46%
Open short contracts | Futures Contracts | U.S. Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 24,848 $ (227,645)
Percent of Partners' Capital (Net Asset Value) [1] 0.01% (0.11%)
Open short contracts | Futures Contracts | U.S. Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (159,929) $ 78,618
Percent of Partners' Capital (Net Asset Value) [1] (0.08%) 0.04%
Open short contracts | Futures Contracts | U.S. Futures Positions | Meats    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (30,589) $ (146,785)
Percent of Partners' Capital (Net Asset Value) [1] (0.02%) (0.07%)
Open short contracts | Futures Contracts | U.S. Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (70,723) $ 156,442
Percent of Partners' Capital (Net Asset Value) [1] (0.04%) 0.07%
Open short contracts | Futures Contracts | U.S. Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 29,570 $ (129,485)
Percent of Partners' Capital (Net Asset Value) [1] 0.01% (0.06%)
Open short contracts | Futures Contracts | U.S. Futures Positions | Stock indices and single stock futures    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (207,053) $ (42,987)
Percent of Partners' Capital (Net Asset Value) [1] (0.10%) (0.02%)
Open short contracts | Futures Contracts | Foreign Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (1,513,200) $ 1,030,992
Open short contracts | Futures Contracts | Foreign Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 4,850 $ 12,799
Percent of Partners' Capital (Net Asset Value) [1] 0.00% 0.01%
Open short contracts | Futures Contracts | Foreign Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (15,346) $ 1,041,906
Percent of Partners' Capital (Net Asset Value) [1] (0.01%) 0.49%
Open short contracts | Futures Contracts | Foreign Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (134,160) $ (108,667)
Percent of Partners' Capital (Net Asset Value) [1] (0.07%) (0.05%)
Open short contracts | Futures Contracts | Foreign Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (1,554,552) $ 277,638
Percent of Partners' Capital (Net Asset Value) [1] (0.79%) 0.13%
Open short contracts | Futures Contracts | Foreign Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (78) $ 5,103
Percent of Partners' Capital (Net Asset Value) [1] 0.00% 0.00%
Open short contracts | Futures Contracts | Foreign Futures Positions | Stock indices    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 186,086 $ (197,787)
Percent of Partners' Capital (Net Asset Value) [1] 0.09% (0.09%)
Open short contracts | Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 0.00%  
Open short contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating March 29, 2019    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 0.00%  
Open short contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating July 1, 2020    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 0.00% 0.00%
Open contracts | Futures, Forward, and Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ 5,448,085 $ 1,755,036
Percent of Partners' Capital (Net Asset Value) 2.76% 0.82%
Open contracts | Forward Contracts | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 723,770 $ (240,659)
Percent of Partners' Capital (Net Asset Value) [1] 0.37% (0.12%)
Open contracts | Futures Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 8,110,991 $ 827,595
Percent of Partners' Capital (Net Asset Value) [1] 4.11% 0.39%
Open contracts | Futures Contracts | U.S. Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 4,782,369 $ 716,287
Open contracts | Futures Contracts | U.S. Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 218,913 $ 474,412
Percent of Partners' Capital (Net Asset Value) [1] 0.11% 0.22%
Open contracts | Futures Contracts | U.S. Futures Positions | Currencies    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 990,427 $ 1,097,929
Percent of Partners' Capital (Net Asset Value) [1] 0.50% 0.51%
Open contracts | Futures Contracts | U.S. Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 156,385 $ (215,688)
Percent of Partners' Capital (Net Asset Value) [1] 0.08% (0.10%)
Open contracts | Futures Contracts | U.S. Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 2,250,816 $ (329,340)
Percent of Partners' Capital (Net Asset Value) [1] 1.14% (0.15%)
Open contracts | Futures Contracts | U.S. Futures Positions | Meats    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (98,194) $ (147,645)
Percent of Partners' Capital (Net Asset Value) [1] (0.05%) (0.07%)
Open contracts | Futures Contracts | U.S. Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 621,671 $ 127,042
Percent of Partners' Capital (Net Asset Value) [1] 0.31% 0.06%
Open contracts | Futures Contracts | U.S. Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 239,874 $ (177,666)
Percent of Partners' Capital (Net Asset Value) [1] 0.12% (0.08%)
Open contracts | Futures Contracts | U.S. Futures Positions | Stock indices and single stock futures    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 402,477 $ (112,757)
Percent of Partners' Capital (Net Asset Value) [1] 0.20% (0.05%)
Open contracts | Futures Contracts | Foreign Futures Positions    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 3,328,622 $ 111,308
Open contracts | Futures Contracts | Foreign Futures Positions | Agriculturals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 1,446 $ 42,224
Percent of Partners' Capital (Net Asset Value) [1] 0.00% 0.02%
Open contracts | Futures Contracts | Foreign Futures Positions | Energy    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (41,639) $ 1,041,906
Percent of Partners' Capital (Net Asset Value) [1] (0.02%) 0.49%
Open contracts | Futures Contracts | Foreign Futures Positions | Interest rates    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 3,063,685 $ (936,229)
Percent of Partners' Capital (Net Asset Value) [1] 1.55% (0.44%)
Open contracts | Futures Contracts | Foreign Futures Positions | Metals    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ (492,826) $ 166,701
Percent of Partners' Capital (Net Asset Value) [1] (0.25%) 0.08%
Open contracts | Futures Contracts | Foreign Futures Positions | Soft commodities    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 16,288 $ 5,264
Percent of Partners' Capital (Net Asset Value) [1] 0.01% 0.00%
Open contracts | Futures Contracts | Foreign Futures Positions | Stock indices    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts [1] $ 781,668 $ (208,558)
Percent of Partners' Capital (Net Asset Value) [1] 0.40% (0.10%)
Open contracts | Swap Contracts    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ (3,386,676)  
Percent of Partners' Capital (Net Asset Value) (1.72%)  
Open contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating March 29, 2019    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ 114,970  
Percent of Partners' Capital (Net Asset Value) 0.05%  
Open contracts | Swap Contracts | Deutsche Bank Total Return Swap Terminating July 1, 2020    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Net unrealized gain/(loss) on open contracts $ (3,501,646) $ 1,168,100
Percent of Partners' Capital (Net Asset Value) (1.77%) 0.55%
Securities owned | Commercial paper    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 8.12% [2] 8.97%
Investments Owned, cost $ 15,995,579 [2] $ 19,158,638
Investments Owned, Fair Value $ 16,025,526 [2] $ 19,181,775
Securities owned | U.S. Government-sponsored enterprises    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 34.93% 38.59%
Investments Owned, cost $ 68,738,842 $ 82,242,670
Investments Owned, Fair Value $ 68,939,869 $ 82,472,451
Securities owned | Federal Farm Credit Banks | U.S. Government-sponsored enterprises    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 25.65% 18.06%
Investments Owned, Face Value $ 50,500,000 $ 38,500,000
Investments Owned, Rate of Return Range Minimum 1.10% 1.10%
Investments Owned, Rate of Return Range Maximum 1.30% 1.40%
Investments Owned, Fair Value $ 50,626,465 $ 38,605,179
Securities owned | Federal Home Loan Banks | U.S. Government-sponsored enterprises    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 9.28% 20.53%
Investments Owned, Face Value $ 18,235,000 $ 43,735,000
Investments Owned, Rate of Return Range Minimum 1.20% 1.10%
Investments Owned, Rate of Return Range Maximum 1.30% 1.50%
Investments Owned, Fair Value $ 18,313,404 $ 43,867,272
Securities owned | U.S. Corporate bonds | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 8.28% 6.85%
Investments Owned, cost $ 16,272,809 $ 14,599,766
Investments Owned, Fair Value $ 16,344,950 $ 14,643,428
Securities owned | American Honda Finance | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 1.02%  
Investments Owned, Face Value $ 2,000,000  
Investments Owned, Rate of Return 1.50%  
Investments Owned, Fair Value $ 2,014,113  
Securities owned | Dominion Gas | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 1.01%  
Investments Owned, Face Value $ 2,000,000  
Investments Owned, Rate of Return 1.20%  
Investments Owned, Fair Value $ 2,002,773  
Securities owned | Wells Fargo & Company | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 1.10%  
Investments Owned, Face Value $ 2,000,000  
Investments Owned, Rate of Return 1.70%  
Investments Owned, Fair Value $ 2,173,148  
Securities owned | Wachovia | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value)   1.03%
Investments Owned, Face Value   $ 2,000,000
Investments Owned, Rate of Return   1.70%
Investments Owned, Fair Value   $ 2,211,634
Securities owned | Others | Corporate Bonds    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) [2] 5.15% 5.82%
Investments Owned, Face Value [2] $ 10,034,000 $ 12,284,000
Investments Owned, Rate of Return Range Minimum [2] 1.20% 1.20%
Investments Owned, Rate of Return Range Maximum [2] 1.80% 1.80%
Investments Owned, Fair Value [2] $ 10,154,916 $ 12,431,794
Securities owned | U.S. commercial paper | Commercial paper    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) 5.85% [2] 7.10%
Investments Owned, Face Value [2] $ 11,578,000  
Investments Owned, Rate of Return Range Minimum [2] 0.80%  
Investments Owned, Rate of Return Range Maximum [2] 1.40%  
Investments Owned, Fair Value $ 11,554,627 [2] $ 15,173,266
Securities owned | National Grid PLC | Commercial paper    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value)   1.87%
Investments Owned, Face Value   $ 4,000,000
Investments Owned, Rate of Return   0.50%
Investments Owned, Fair Value   $ 3,999,320
Securities owned | Others | Commercial paper    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) [2]   5.23%
Investments Owned, Face Value [2]   $ 11,180,000
Investments Owned, Rate of Return Range Minimum [2]   0.40%
Investments Owned, Rate of Return Range Maximum [2]   0.90%
Investments Owned, Fair Value [2]   $ 11,173,946
Securities owned | Foreign commercial paper | Commercial paper    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Percent of Partners' Capital (Net Asset Value) [2] 2.27% 1.87%
Investments Owned, Face Value [2] $ 4,480,000 $ 4,010,000
Investments Owned, Rate of Return Range Minimum [2]   0.50%
Investments Owned, Rate of Return Range Maximum [2]   0.80%
Investments Owned, Rate of Return [2] 0.90%  
Investments Owned, Fair Value [2] $ 4,470,899 $ 4,008,509
[1] No individual futures and forward contract position constituted greater than 1 percent of partners’ capital (net asset value). Accordingly, the number of contracts and expiration dates are not presented.
[2] No individual position constituted greater than 1 percent of partners' capital (net asset value).