Gross and Net Unrealized Gains and Losses by Long and Short Positions (Detail) (USD $) | Sep. 30, 2014 | Dec. 31, 2013 |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | $397,499 | | $817,800 | |
Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 91,642 | | 153,049 | |
Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -44 | |
Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 72,797 | | 147,163 | |
Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 117,248 | | 43,596 | |
Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -98,397 | | 592,965 | |
Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 138,631 | | 39,930 | |
Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 42,770 | | -17,370 | |
Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 32,808 | | -141,489 | |
Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 222,589 | | 1,125,807 | |
Gains percentage of net assets | 0.90% | | 4.00% | |
Losses | -364,776 | | -447,541 | |
Loss percentage of net assets | -1.70% | | -1.60% | |
Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,500 | | 65,637 | |
Gains percentage of net assets | 0.00% | [1] | 0.20% | |
Losses | -19,675 | | -27,081 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 90,931 | | 4,949 | |
Gains percentage of net assets | 0.40% | | 0.00% | [1] |
Losses | -21,290 | | -15,428 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,015 | | 14,080 | |
Gains percentage of net assets | 0.00% | [1] | 0.10% | |
Losses | -6,370 | | -92,471 | |
Loss percentage of net assets | 0.00% | [1] | -0.30% | |
Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 47,853 | | 643,153 | |
Gains percentage of net assets | 0.20% | | 2.30% | |
Losses | -170,587 | | -31,623 | |
Loss percentage of net assets | -0.80% | | -0.10% | |
Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 5,085 | | 275,909 | |
Gains percentage of net assets | 0.00% | [1] | 1.00% | |
Losses | -79,922 | | ' | |
Loss percentage of net assets | -0.40% | | ' | |
Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 46,650 | | ' | |
Gains percentage of net assets | 0.20% | | ' | |
Losses | -3,880 | | -17,370 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 25,555 | | 122,079 | |
Gains percentage of net assets | 0.10% | | 0.40% | |
Losses | -63,052 | | -263,568 | |
Loss percentage of net assets | -0.30% | | -0.90% | |
Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 566,714 | | 567,289 | |
Gains percentage of net assets | 2.50% | | 2.00% | |
Losses | -27,028 | | -427,755 | |
Loss percentage of net assets | -0.10% | | -1.60% | |
Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 112,078 | | 122,158 | |
Gains percentage of net assets | 0.50% | | 0.40% | |
Losses | -3,261 | | -7,665 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | ' | | -44 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 10,241 | | 176,082 | |
Gains percentage of net assets | 0.00% | [1] | 0.60% | |
Losses | -7,085 | | -18,440 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 130,534 | | 122,152 | |
Gains percentage of net assets | 0.60% | | 0.40% | |
Losses | -10,931 | | -165 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 27,014 | | 168 | |
Gains percentage of net assets | 0.10% | | 0.00% | [1] |
Losses | -2,677 | | -18,733 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 215,120 | | 146,729 | |
Gains percentage of net assets | 1.00% | | 0.50% | |
Losses | -1,652 | | -382,708 | |
Loss percentage of net assets | 0.00% | [1] | -1.40% | |
Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 71,727 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | -1,422 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES A | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 129,987 | | 293,051 | |
SERIES A | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 25,796 | | 55,136 | |
SERIES A | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -12 | |
SERIES A | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 25,000 | | 62,076 | |
SERIES A | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 43,733 | | 17,927 | |
SERIES A | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -31,749 | | 219,313 | |
SERIES A | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 44,600 | | 3,604 | |
SERIES A | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 16,480 | | -6,620 | |
SERIES A | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 6,127 | | -58,373 | |
SERIES A | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 75,363 | | 419,558 | |
Gains percentage of net assets | 0.70% | | 3.20% | |
Losses | -134,205 | | -177,313 | |
Loss percentage of net assets | -1.20% | | -1.40% | |
SERIES A | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,000 | | 25,369 | |
Gains percentage of net assets | 0.00% | [1] | 0.20% | |
Losses | -7,488 | | -10,850 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES A | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 32,297 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | -8,756 | | -5,977 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES A | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,410 | | 4,790 | |
Gains percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Losses | -1,005 | | -35,406 | |
Loss percentage of net assets | 0.00% | [1] | -0.30% | |
SERIES A | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 15,470 | | 240,531 | |
Gains percentage of net assets | 0.10% | | 1.90% | |
Losses | -57,186 | | -15,443 | |
Loss percentage of net assets | -0.50% | | -0.10% | |
SERIES A | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,349 | | 104,224 | |
Gains percentage of net assets | 0.00% | [1] | 0.80% | |
Losses | -34,622 | | ' | |
Loss percentage of net assets | -0.30% | | ' | |
SERIES A | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 16,590 | | ' | |
Gains percentage of net assets | 0.20% | | ' | |
Losses | -110 | | -6,620 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES A | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 6,247 | | 44,644 | |
Gains percentage of net assets | 0.10% | | 0.30% | |
Losses | -25,038 | | -103,017 | |
Loss percentage of net assets | -0.20% | | -0.80% | |
SERIES A | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 199,479 | | 217,928 | |
Gains percentage of net assets | 1.80% | | 1.70% | |
Losses | -10,650 | | -167,122 | |
Loss percentage of net assets | 0.00% | [1] | -1.30% | |
SERIES A | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 33,581 | | 43,758 | |
Gains percentage of net assets | 0.30% | | 0.30% | |
Losses | -1,297 | | -3,141 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
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 | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,067 | | 75,733 | |
Gains percentage of net assets | 0.00% | [1] | 0.60% | |
Losses | -2,608 | | -7,680 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES A | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 47,438 | | 48,543 | |
Gains percentage of net assets | 0.50% | | 0.40% | |
Losses | -4,110 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES A | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 11,133 | | 56 | |
Gains percentage of net assets | 0.10% | | 0.00% | [1] |
Losses | -1,166 | | -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 | 77,754 | | 49,838 | |
Gains percentage of net assets | 0.70% | | 0.40% | |
Losses | -881 | | -150,458 | |
Loss percentage of net assets | 0.00% | [1] | -1.20% | |
SERIES A | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 25,506 | | ' | |
Gains percentage of net assets | 0.20% | | ' | |
Losses | -588 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES B | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 267,512 | | 524,749 | |
SERIES B | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 65,849 | | 97,913 | |
SERIES B | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | ' | | -32 | |
SERIES B | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 47,797 | | 85,087 | |
SERIES B | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 73,515 | | 25,669 | |
SERIES B | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -66,648 | | 373,652 | |
SERIES B | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 94,031 | | 36,326 | |
SERIES B | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 26,290 | | -10,750 | |
SERIES B | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 26,681 | | -83,116 | |
SERIES B | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 147,226 | | 706,249 | |
Gains percentage of net assets | 1.30% | | 4.80% | |
Losses | -230,571 | | -270,228 | |
Loss percentage of net assets | -1.90% | | -1.70% | |
SERIES B | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,500 | | 40,268 | |
Gains percentage of net assets | 0.00% | [1] | 0.30% | |
Losses | -12,187 | | -16,231 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 58,634 | | 4,949 | |
Gains percentage of net assets | 0.50% | | 0.00% | [1] |
Losses | -12,534 | | -9,451 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,605 | | 9,290 | |
Gains percentage of net assets | 0.00% | [1] | 0.10% | |
Losses | -5,365 | | -57,065 | |
Loss percentage of net assets | 0.00% | [1] | -0.40% | |
SERIES B | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 32,383 | | 402,622 | |
Gains percentage of net assets | 0.30% | | 2.70% | |
Losses | -113,401 | | -16,180 | |
Loss percentage of net assets | -1.00% | | -0.10% | |
SERIES B | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,736 | | 171,685 | |
Gains percentage of net assets | 0.00% | [1] | 1.20% | |
Losses | -45,300 | | ' | |
Loss percentage of net assets | -0.40% | | ' | |
SERIES B | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 30,060 | | ' | |
Gains percentage of net assets | 0.30% | | ' | |
Losses | -3,770 | | -10,750 | |
Loss percentage of net assets | 0.00% | [1] | 0.10% | |
SERIES B | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 19,308 | | 77,435 | |
Gains percentage of net assets | 0.20% | | 0.50% | |
Losses | -38,014 | | -160,551 | |
Loss percentage of net assets | -0.30% | | -1.10% | |
SERIES B | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 367,235 | | 349,361 | |
Gains percentage of net assets | 3.30% | | 2.40% | |
Losses | -16,378 | | -260,633 | |
Loss percentage of net assets | -0.10% | | -1.80% | |
SERIES B | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 78,497 | | 78,400 | |
Gains percentage of net assets | 0.70% | | 0.50% | |
Losses | -1,964 | | -4,524 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
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 | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 6,174 | | 100,349 | |
Gains percentage of net assets | 0.10% | | 0.70% | |
Losses | -4,477 | | -10,760 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES B | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 83,096 | | 73,609 | |
Gains percentage of net assets | 0.80% | | 0.50% | |
Losses | -6,821 | | -165 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES B | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 15,881 | | 112 | |
Gains percentage of net assets | 0.10% | | 0.00% | [1] |
Losses | -1,511 | | -12,902 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES B | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 137,366 | | 96,891 | |
Gains percentage of net assets | 1.20% | | 0.70% | |
Losses | -771 | | -232,250 | |
Loss percentage of net assets | 0.00% | [1] | -1.60% | |
SERIES B | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 46,221 | | ' | |
Gains percentage of net assets | 0.40% | | ' | |
Losses | ($834) | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
|
[1] | Due to rounding - amount is less than 0.05% |