Gross and Net Unrealized Gains and Losses by Long and Short Positions (Detail) (USD $) | Jun. 30, 2014 | Dec. 31, 2013 |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | $232,980 | | $817,800 | |
Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -44 | |
Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 57,923 | | 153,049 | |
Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 62,517 | | 147,163 | |
Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 52,262 | | 43,596 | |
Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 16,936 | | 592,965 | |
Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 9,543 | | 39,930 | |
Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 68,150 | | -17,370 | |
Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -34,351 | | -141,489 | |
Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 436,139 | | 1,125,807 | |
Gains percentage of net assets | 2.00% | | 4.10% | |
Losses | -242,018 | | -447,541 | |
Loss percentage of net assets | -1.10% | | -1.60% | |
Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 78,649 | | 65,637 | |
Gains percentage of net assets | 0.40% | | 0.20% | |
Losses | -23,563 | | -27,081 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 88,345 | | 4,949 | |
Gains percentage of net assets | 0.40% | | 0.00% | [1] |
Losses | ' | | -15,428 | |
Loss percentage of net assets | ' | | -0.10% | |
Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 7,091 | | 14,080 | |
Gains percentage of net assets | 0.00% | [1] | 0.10% | |
Losses | -25,507 | | -92,471 | |
Loss percentage of net assets | -0.10% | | -0.30% | |
Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 108,624 | | 643,153 | |
Gains percentage of net assets | 0.50% | | 2.30% | |
Losses | -87,760 | | -31,623 | |
Loss percentage of net assets | -0.40% | | -0.10% | |
Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 14,499 | | 275,909 | |
Gains percentage of net assets | 0.10% | | 1.00% | |
Losses | -2,316 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 68,150 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | ' | | -17,370 | |
Loss percentage of net assets | ' | | -0.10% | |
Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 70,781 | | 122,079 | |
Gains percentage of net assets | 0.30% | | 0.40% | |
Losses | -102,872 | | -263,568 | |
Loss percentage of net assets | -0.50% | | -0.90% | |
Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 73,638 | | 567,289 | |
Gains percentage of net assets | 0.30% | | 2.00% | |
Losses | -34,779 | | -427,755 | |
Loss percentage of net assets | -0.20% | | -1.50% | |
Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | ' | | -44 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,837 | | 122,158 | |
Gains percentage of net assets | 0.00% | [1] | 0.40% | |
Losses | ' | | -7,665 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 176,082 | |
Gains percentage of net assets | ' | | 0.60% | |
Losses | -25,828 | | -18,440 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 70,801 | | 122,152 | |
Gains percentage of net assets | 0.30% | | 0.40% | |
Losses | -123 | | -165 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 168 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -3,928 | | -18,733 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 146,729 | |
Gains percentage of net assets | ' | | 0.50% | |
Losses | -2,640 | | -382,708 | |
Loss percentage of net assets | 0.00% | [1] | -1.40% | |
Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -2,260 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES A | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 97,417 | | 293,051 | |
SERIES A | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -12 | |
SERIES A | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 21,823 | | 55,136 | |
SERIES A | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 20,211 | | 62,076 | |
SERIES A | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 19,295 | | 17,927 | |
SERIES A | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 8,966 | | 219,313 | |
SERIES A | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 3,581 | | 3,604 | |
SERIES A | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 28,860 | | -6,620 | |
SERIES A | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -5,319 | | -58,373 | |
SERIES A | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 169,152 | | 419,558 | |
Gains percentage of net assets | 1.60% | | 3.20% | |
Losses | -85,649 | | -177,313 | |
Loss percentage of net assets | -0.80% | | -1.40% | |
SERIES A | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 29,994 | | 25,369 | |
Gains percentage of net assets | 0.30% | | 0.20% | |
Losses | -9,213 | | -10,850 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES A | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 32,083 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | ' | | -5,977 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES A | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,799 | | 4,790 | |
Gains percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Losses | -10,688 | | -35,406 | |
Loss percentage of net assets | -0.10% | | -0.30% | |
SERIES A | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 41,466 | | 240,531 | |
Gains percentage of net assets | 0.40% | | 1.90% | |
Losses | -31,512 | | -15,443 | |
Loss percentage of net assets | -0.30% | | -0.10% | |
SERIES A | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 5,452 | | 104,224 | |
Gains percentage of net assets | 0.10% | | 0.80% | |
Losses | -1,059 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES A | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 28,860 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | ' | | -6,620 | |
Loss percentage of net assets | ' | | -0.10% | |
SERIES A | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 28,498 | | 44,644 | |
Gains percentage of net assets | 0.30% | | 0.30% | |
Losses | -33,177 | | -103,017 | |
Loss percentage of net assets | -0.30% | | -0.80% | |
SERIES A | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 28,226 | | 217,928 | |
Gains percentage of net assets | 0.30% | | 1.70% | |
Losses | -14,312 | | -167,122 | |
Loss percentage of net assets | -0.10% | | -1.30% | |
SERIES A | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | ' | | -12 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES A | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,042 | | 43,758 | |
Gains percentage of net assets | 0.00% | [1] | 0.30% | |
Losses | ' | | -3,141 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES A | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 75,733 | |
Gains percentage of net assets | ' | | 0.60% | |
Losses | -11,872 | | -7,680 | |
Loss percentage of net assets | -0.10% | | -0.10% | [1] |
SERIES A | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 27,184 | | 48,543 | |
Gains percentage of net assets | 0.30% | | 0.40% | |
SERIES A | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 56 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -988 | | -5,831 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
SERIES A | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 49,838 | |
Gains percentage of net assets | ' | | 0.40% | |
Losses | -812 | | -150,458 | |
Loss percentage of net assets | 0.00% | [1] | -1.20% | |
SERIES A | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -640 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES B | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 135,563 | | 524,749 | |
SERIES B | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -32 | |
SERIES B | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 36,100 | | 97,913 | |
SERIES B | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 42,306 | | 85,087 | |
SERIES B | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 32,967 | | 25,669 | |
SERIES B | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 7,970 | | 373,652 | |
SERIES B | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 5,962 | | 36,326 | |
SERIES B | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 39,290 | | -10,750 | |
SERIES B | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -29,032 | | -83,116 | |
SERIES B | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 266,987 | | 706,249 | |
Gains percentage of net assets | 2.30% | | 4.80% | |
Losses | -156,369 | | -270,228 | |
Loss percentage of net assets | -1.30% | | -1.80% | |
SERIES B | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 48,655 | | 40,268 | |
Gains percentage of net assets | 0.40% | | 0.30% | |
Losses | -14,350 | | -16,231 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 56,262 | | 4,949 | |
Gains percentage of net assets | 0.50% | | 0.00% | [1] |
Losses | ' | | -9,451 | |
Loss percentage of net assets | ' | | -0.10% | |
SERIES B | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,292 | | 9,290 | |
Gains percentage of net assets | 0.00% | [1] | 0.10% | |
Losses | -14,819 | | -57,065 | |
Loss percentage of net assets | -0.10% | | -0.40% | |
SERIES B | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 67,158 | | 402,622 | |
Gains percentage of net assets | 0.60% | | 2.70% | |
Losses | -56,248 | | -16,180 | |
Loss percentage of net assets | -0.50% | | -0.10% | |
SERIES B | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 9,047 | | 171,685 | |
Gains percentage of net assets | 0.10% | | 1.20% | |
Losses | -1,257 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES B | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 39,290 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | ' | | -10,750 | |
Loss percentage of net assets | ' | | 0.10% | |
SERIES B | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 42,283 | | 77,435 | |
Gains percentage of net assets | 0.40% | | 0.50% | |
Losses | -69,695 | | -160,551 | |
Loss percentage of net assets | -0.60% | | -1.10% | |
SERIES B | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 45,412 | | 349,361 | |
Gains percentage of net assets | 0.40% | | 2.40% | |
Losses | -20,467 | | -260,633 | |
Loss percentage of net assets | -0.20% | | -1.80% | |
SERIES B | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | ' | | -32 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES B | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,795 | | 78,400 | |
Gains percentage of net assets | 0.00% | [1] | 0.50% | |
Losses | ' | | -4,524 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES B | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 100,349 | |
Gains percentage of net assets | ' | | 0.70% | |
Losses | -13,956 | | -10,760 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 43,617 | | 73,609 | |
Gains percentage of net assets | 0.40% | | 0.50% | |
Losses | -123 | | -165 | |
Loss percentage of net assets | 0.00% | | 0.00% | [1] |
SERIES B | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 112 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -2,940 | | -12,902 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES B | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 96,891 | |
Gains percentage of net assets | ' | | 0.70% | |
Losses | -1,828 | | -232,250 | |
Loss percentage of net assets | 0.00% | | -1.60% | |
SERIES B | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | ($1,620) | | ' | |
Loss percentage of net assets | 0.00% | | ' | |
|
[1] | Due to rounding |