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Consolidated Condensed Schedule of Investments - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Investments Owned, Cost $ 63,997,878 $ 74,547,232
Investments Owned, Fair Value 63,107,730 74,642,951
Grant Park Absolute Return Fund, Class I    
Unrealized gain/(loss), percent of partners' capital (net asset value), face value and fair value of Investments Owned    
Investments Owned, Fair Value 4,964,176 7,683,587
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 $ 2,928,035 $ 4,518,063
Percent of Partners' Capital (Net Asset Value) 3.41% 3.98%
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] $ 22,377 $ 179,608
Percent of Partners' Capital (Net Asset Value) [1] 0.03% 0.16%
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] $ 1,306,864 $ 3,159,143
Percent of Partners' Capital (Net Asset Value) [1] 1.52% 2.78%
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] $ 825,728 $ 2,644,054
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] $ (7,068) $ (11,912)
Percent of Partners' Capital (Net Asset Value) [1] (0.01%) (0.01%)
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] $ 7,207 $ 391,917
Percent of Partners' Capital (Net Asset Value) [1] 0.01% 0.35%
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] $ 859,414 $ 1,144,493
Percent of Partners' Capital (Net Asset Value) [1] 1.00% 1.01%
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] $ (228,511) $ 19,476
Percent of Partners' Capital (Net Asset Value) [1] (0.26%) 0.02%
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] $ 33,213 $ 30,083
Percent of Partners' Capital (Net Asset Value) [1] 0.04% 0.03%
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] $ (50,548) $ 497,533
Percent of Partners' Capital (Net Asset Value) [1] (0.06%) 0.44%
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] $ (15,515) $ 217,286
Percent of Partners' Capital (Net Asset Value) [1] (0.02%) 0.19%
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] $ 227,536 $ 355,178
Percent of Partners' Capital (Net Asset Value) [1] 0.26% 0.31%
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] $ 481,136 $ 515,089
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] 1,450  
Open long contracts | Futures Contracts | Foreign 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]   $ 19,742
Percent of Partners' Capital (Net Asset Value) [1]   0.02%
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] $ 11,935 $ (484)
Percent of Partners' Capital (Net Asset Value) [1] 0.01%  
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] $ (359,063) $ (580,554)
Percent of Partners' Capital (Net Asset Value) [1] (0.42%) (0.51%)
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] $ 59,786 $ 922,460
Percent of Partners' Capital (Net Asset Value) [1] 0.07% 0.81%
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] $ 767,028 $ 153,925
Percent of Partners' Capital (Net Asset Value) [1] 0.89% 0.14%
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 $ 1,598,794 $ 1,179,312
Percent of Partners' Capital (Net Asset Value) 1.86% 1.04%
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 $ (34,349) $ 56,614
Percent of Partners' Capital (Net Asset Value) (0.04%) 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 $ 1,633,143 $ 1,122,698
Percent of Partners' Capital (Net Asset Value) 1.90% 0.99%
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 $ 646,766 $ (668,465)
Percent of Partners' Capital (Net Asset Value) 0.75% (0.59%)
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] $ (135,976) $ (153,981)
Percent of Partners' Capital (Net Asset Value) [1] (0.16%) (0.14%)
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] $ 782,742 $ (514,484)
Percent of Partners' Capital (Net Asset Value) [1] 0.91% (0.45%)
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] $ 888,488 $ 84,023
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] $ 64,534 $ 149,021
Percent of Partners' Capital (Net Asset Value) [1] 0.08% 0.13%
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] $ 93,907 $ (65,662)
Percent of Partners' Capital (Net Asset Value) [1] 0.11% (0.06%)
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] $ (3,700) $ (98,244)
Percent of Partners' Capital (Net Asset Value) [1]   (0.09%)
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] $ 457,132 $ 274,668
Percent of Partners' Capital (Net Asset Value) [1] 0.53% 0.24%
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] $ (8,596) $ 963
Percent of Partners' Capital (Net Asset Value) [1] (0.01%)  
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] $ 28,208 $ (111,735)
Percent of Partners' Capital (Net Asset Value) [1] 0.03% (0.10%)
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] $ 285,423 $ (23,266)
Percent of Partners' Capital (Net Asset Value) [1] 0.33% (0.02%)
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] $ (28,420) $ (41,722)
Percent of Partners' Capital (Net Asset Value) [1] (0.03%) (0.03%)
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] $ (105,746) $ (598,507)
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] 2,801 $ 13,080
Percent of Partners' Capital (Net Asset Value) [1]   0.01%
Open short contracts | Futures Contracts | Foreign 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] 1,934 $ 47,586
Percent of Partners' Capital (Net Asset Value) [1]   0.04%
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] $ 7,679 $ (53,365)
Percent of Partners' Capital (Net Asset Value) [1] 0.01% (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] $ (89,924) $ (672,078)
Percent of Partners' Capital (Net Asset Value) [1] (0.10%) (0.59%)
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] $ 14,363 $ 15,274
Percent of Partners' Capital (Net Asset Value) [1] 0.02% 0.01%
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] $ (42,599) $ 50,996
Percent of Partners' Capital (Net Asset Value) [1] (0.05%) 0.04%
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 $ 3,574,801 $ 3,849,598
Percent of Partners' Capital (Net Asset Value) 4.16% 3.39%
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] $ (113,599) $ 25,627
Percent of Partners' Capital (Net Asset Value) [1] (0.13%) 0.02%
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] $ 2,089,606 $ 2,644,659
Percent of Partners' Capital (Net Asset Value) [1] 2.43% 2.33%
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] $ 1,714,216 $ 2,728,077
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] $ 57,466 $ 137,109
Percent of Partners' Capital (Net Asset Value) [1] 0.07% 0.12%
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] $ 101,114 $ 326,255
Percent of Partners' Capital (Net Asset Value) [1] 0.12% 0.29%
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] $ 855,714 $ 1,046,249
Percent of Partners' Capital (Net Asset Value) [1] 1.00% 0.92%
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] $ 228,621 $ 294,144
Percent of Partners' Capital (Net Asset Value) [1] 0.27% 0.26%
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] $ 24,617 $ 31,046
Percent of Partners' Capital (Net Asset Value) [1] 0.03% 0.03%
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] $ (22,340) $ 385,798
Percent of Partners' Capital (Net Asset Value) [1] (0.03%) 0.34%
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] $ 269,908 $ 194,020
Percent of Partners' Capital (Net Asset Value) [1] 0.31% 0.17%
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] $ 199,116 $ 313,456
Percent of Partners' Capital (Net Asset Value) [1] 0.23% 0.28%
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] $ 375,390 $ (83,418)
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] 4,251 $ 13,080
Percent of Partners' Capital (Net Asset Value) [1]   0.01%
Open contracts | Futures Contracts | Foreign 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] 1,934 $ 67,328
Percent of Partners' Capital (Net Asset Value) [1]   0.06%
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] $ 11,935 $ (484)
Percent of Partners' Capital (Net Asset Value) [1] 0.01%  
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] $ (351,384) $ (633,919)
Percent of Partners' Capital (Net Asset Value) [1] (0.41%) (0.56%)
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] $ (30,138) $ 250,382
Percent of Partners' Capital (Net Asset Value) [1] (0.03%) 0.22%
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] $ 14,363 $ 15,274
Percent of Partners' Capital (Net Asset Value) [1] 0.02% 0.01%
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] $ 724,429 $ 204,921
Percent of Partners' Capital (Net Asset Value) [1] 0.84% 0.18%
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 $ 1,598,794 $ 1,179,312
Percent of Partners' Capital (Net Asset Value) 1.86% 1.04%
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 $ (34,349) $ 56,614
Percent of Partners' Capital (Net Asset Value) (0.04%) 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 $ 1,633,143 $ 1,122,698
Percent of Partners' Capital (Net Asset Value) 1.90% 0.99%
Securities owned    
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) 73.49% 65.77%
Investments Owned, Cost $ 63,997,878 $ 74,547,232
Investments Owned, Fair Value $ 63,107,730 $ 74,642,951
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) 61.31% 52.59%
Investments Owned, Cost $ 52,497,750 $ 59,497,750
Investments Owned, Fair Value $ 52,648,318 $ 59,683,241
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) 39.69% 33.58%
Investments Owned, Face Value $ 34,000,000 $ 38,000,000
Investments Owned, Rate of Return Range Minimum 1.10% 1.10%
Investments Owned, Rate of Return Range Maximum 1.30% 1.30%
Investments Owned, Fair Value $ 34,084,792 $ 38,103,115
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) 18.70% 16.80%
Investments Owned, Face Value $ 16,000,000 $ 19,000,000
Investments Owned, Rate of Return Range Minimum 1.10% 1.10%
Investments Owned, Rate of Return Range Maximum 1.50% 1.50%
Investments Owned, Fair Value $ 16,057,826 $ 19,067,301
Securities owned | Federal Agricultural Mortgage Corp. | 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) 2.92% 2.21%
Investments Owned, Face Value $ 2,500,000 $ 2,500,000
Investments Owned, Rate of Return 1.10% 1.10%
Investments Owned, Fair Value $ 2,505,700 $ 2,512,825
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)   3.58%
Investments Owned, Cost   $ 4,040,501
Investments Owned, Fair Value   $ 4,066,723
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)   1.77%
Investments Owned, Face Value   $ 2,000,000
Investments Owned, Rate of Return   1.50%
Investments Owned, Fair Value   $ 2,012,166
Securities owned | Wells Fargo and 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)   1.81%
Investments Owned, Face Value   $ 2,000,000
Investments Owned, Rate of Return   1.70%
Investments Owned, Fair Value   $ 2,054,557
Securities owned | Grant Park Absolute Return Fund, Class I    
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) 5.78% 6.77%
Investments Owned, Shares 532,066 689,730
Investments Owned, Cost $ 6,001,576 $ 7,779,984
Investments Owned, Fair Value $ 4,964,176 $ 7,683,587
Securities owned | U.S. Exchange Traded Funds    
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) 5.25% 2.83% [2]
Investments Owned, Shares [2]   110,000
Investments Owned, Cost $ 4,518,052 $ 3,228,997 [2]
Investments Owned, Fair Value $ 4,505,125 $ 3,209,400 [2]
Securities owned | Highland/iBoxx Senior Loan ETF    
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) 1.59%  
Investments Owned, Shares 75,000  
Investments Owned, Fair Value $ 1,369,125  
Securities owned | PIMCO Enhanced Short Maturity Active ETF    
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) 2.37%  
Investments Owned, Shares 20,000  
Investments Owned, Fair Value $ 2,032,400  
Securities owned | SPDR Bloomberg Barclays Short Term High Yield Bond ETF    
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) 1.29%  
Investments Owned, Shares 40,000  
Investments Owned, Fair Value $ 1,103,600  
Securities owned | U.S. Treasury Bills | U.S. Government securities    
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) 1.15%  
Investments Owned, Face Value $ 1,000,000  
Investments Owned, Rate of Return 2.10%  
Investments Owned, Cost $ 980,500  
Investments Owned, Fair Value $ 990,111  
[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).