Gross and Net Unrealized Gains and Losses by Long and Short Positions (Detail) (USD $) | Mar. 31, 2014 | Dec. 31, 2013 |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | $496,884 | | $817,800 | |
Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -492 | | -44 | |
Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -2,004 | | 153,049 | |
Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 14,837 | | 147,163 | |
Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 198,128 | | 43,596 | |
Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 22,131 | | 592,965 | |
Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 237,829 | | 39,930 | |
Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 14,980 | | -17,370 | |
Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 11,475 | | -141,489 | |
Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 509,620 | | 1,125,807 | |
Gains percentage of net assets | 2.00% | | 4.10% | |
Losses | -199,103 | | -447,541 | |
Loss percentage of net assets | -0.80% | | -1.60% | |
Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 18 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -40 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 3,067 | | 65,637 | |
Gains percentage of net assets | 0.00% | [1] | 0.20% | |
Losses | -29,119 | | -27,081 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 57,305 | | 4,949 | |
Gains percentage of net assets | 0.20% | | 0.00% | [1] |
Losses | -46,218 | | -15,428 | |
Loss percentage of net assets | -0.20% | | -0.10% | |
Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 200,283 | | 14,080 | |
Gains percentage of net assets | 0.80% | | 0.10% | |
Losses | -1,711 | | -92,471 | |
Loss percentage of net assets | 0.00% | [1] | -0.30% | |
Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 172,251 | | 643,153 | |
Gains percentage of net assets | 0.70% | | 2.30% | |
Losses | -72,660 | | -31,623 | |
Loss percentage of net assets | -0.30% | | -0.10% | |
Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 16,969 | | 275,909 | |
Gains percentage of net assets | 0.10% | | 1.00% | |
Losses | -38,065 | | ' | |
Loss percentage of net assets | -0.20% | | ' | |
Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 17,150 | | ' | |
Gains percentage of net assets | 0.10% | | ' | |
Losses | -2,170 | | -17,370 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 42,577 | | 122,079 | |
Gains percentage of net assets | 0.20% | | 0.40% | |
Losses | -9,120 | | -263,568 | |
Loss percentage of net assets | 0.00% | [1] | -0.90% | |
Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 313,173 | | 567,289 | |
Gains percentage of net assets | 1.20% | | 2.00% | |
Losses | -126,806 | | -427,755 | |
Loss percentage of net assets | -0.50% | | -1.50% | |
Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -470 | | -44 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 44,363 | | 122,158 | |
Gains percentage of net assets | 0.20% | | 0.40% | |
Losses | -20,315 | | -7,665 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 6,727 | | 176,082 | |
Gains percentage of net assets | 0.00% | [1] | 0.60% | |
Losses | -2,977 | | -18,440 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 122,152 | |
Gains percentage of net assets | ' | | 0.40% | |
Losses | -444 | | -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 | -77,460 | | -18,733 | |
Loss percentage of net assets | -0.30% | | -0.10% | |
Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 260,883 | | 146,729 | |
Gains percentage of net assets | 1.00% | | 0.50% | |
Losses | -1,958 | | -382,708 | |
Loss percentage of net assets | 0.00% | [1] | -1.40% | |
Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,200 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -23,182 | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
SERIES A | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 195,828 | | 293,051 | |
SERIES A | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -174 | | -12 | |
SERIES A | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -1,008 | | 55,136 | |
SERIES A | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 16,434 | | 62,076 | |
SERIES A | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 73,373 | | 17,927 | |
SERIES A | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 10,744 | | 219,313 | |
SERIES A | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 94,275 | | 3,604 | |
SERIES A | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 4,360 | | -6,620 | |
SERIES A | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -2,176 | | -58,373 | |
SERIES A | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 194,573 | | 419,558 | |
Gains percentage of net assets | 1.60% | | 3.20% | |
Losses | -72,740 | | -177,313 | |
Loss percentage of net assets | -0.60% | | -1.40% | |
SERIES A | Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 6 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -16 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES A | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,081 | | 25,369 | |
Gains percentage of net assets | 0.00% | [1] | 0.20% | |
Losses | -12,281 | | -10,850 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES A | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 29,194 | | ' | |
Gains percentage of net assets | 0.20% | | ' | |
Losses | -14,500 | | -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 | 74,363 | | 4,790 | |
Gains percentage of net assets | 0.60% | | 0.00% | [1] |
Losses | -990 | | -35,406 | |
Loss percentage of net assets | 0.00% | [1] | -0.30% | |
SERIES A | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 66,371 | | 240,531 | |
Gains percentage of net assets | 0.60% | | 1.90% | |
Losses | -26,818 | | -15,443 | |
Loss percentage of net assets | -0.20% | | -0.10% | |
SERIES A | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 5,687 | | 104,224 | |
Gains percentage of net assets | 0.00% | [1] | 0.80% | |
Losses | -13,424 | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
SERIES A | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 5,280 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -920 | | -6,620 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES A | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 12,591 | | 44,644 | |
Gains percentage of net assets | 0.10% | | 0.30% | |
Losses | -3,791 | | -103,017 | |
Loss percentage of net assets | 0.00% | [1] | -0.80% | |
SERIES A | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 122,594 | | 217,928 | |
Gains percentage of net assets | 1.00% | | 1.70% | |
Losses | -48,599 | | -167,122 | |
Loss percentage of net assets | -0.10% | | -1.30% | |
SERIES A | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -164 | | -12 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
SERIES A | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 16,900 | | 43,758 | |
Gains percentage of net assets | 0.10% | | 0.30% | |
Losses | -6,708 | | -3,141 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES A | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 2,913 | | 75,733 | |
Gains percentage of net assets | 0.00% | [1] | 0.60% | |
Losses | -1,173 | | -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 | ' | | 48,543 | |
Gains percentage of net assets | ' | | 0.41% | |
SERIES A | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 56 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -28,809 | | -5,831 | |
Loss percentage of net assets | -0.20% | | 0.00% | [1] |
SERIES A | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 102,381 | | 49,838 | |
Gains percentage of net assets | 0.90% | | 0.40% | |
Losses | -369 | | -150,458 | |
Loss percentage of net assets | 0.00% | [1] | -1.20% | |
SERIES A | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 400 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -11,376 | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
SERIES B | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 301,056 | | 524,749 | |
SERIES B | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -318 | | -32 | |
SERIES B | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -996 | | 97,913 | |
SERIES B | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -1,597 | | 85,087 | |
SERIES B | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 124,755 | | 25,669 | |
SERIES B | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 11,387 | | 373,652 | |
SERIES B | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 143,554 | | 36,326 | |
SERIES B | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 10,620 | | -10,750 | |
SERIES B | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 13,651 | | -83,116 | |
SERIES B | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 315,047 | | 706,249 | |
Gains percentage of net assets | 2.40% | | 4.80% | |
Losses | -126,363 | | -270,228 | |
Loss percentage of net assets | -1.00% | | -1.80% | |
SERIES B | Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 12 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -24 | | ' | |
Loss percentage of net assets | 0.00% | [1] | ' | |
SERIES B | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,986 | | 40,268 | |
Gains percentage of net assets | 0.00% | [1] | 0.30% | |
Losses | -16,838 | | -16,231 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 28,111 | | 4,949 | |
Gains percentage of net assets | 0.20% | | 0.00% | [1] |
Losses | -31,718 | | -9,451 | |
Loss percentage of net assets | -0.20% | | -0.10% | |
SERIES B | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 125,920 | | 9,290 | |
Gains percentage of net assets | 1.00% | | 0.10% | |
Losses | -721 | | -57,065 | |
Loss percentage of net assets | 0.00% | [1] | -0.40% | |
SERIES B | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 105,880 | | 402,622 | |
Gains percentage of net assets | 0.80% | | 2.70% | |
Losses | -45,842 | | -16,180 | |
Loss percentage of net assets | -0.30% | | -0.10% | |
SERIES B | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 11,282 | | 171,685 | |
Gains percentage of net assets | 0.10% | | 1.20% | |
Losses | -24,641 | | ' | |
Loss percentage of net assets | -0.20% | | ' | |
SERIES B | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 11,870 | | ' | |
Gains percentage of net assets | 0.10% | | ' | |
Losses | -1,250 | | -10,750 | |
Loss percentage of net assets | 0.00% | [1] | 0.10% | |
SERIES B | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 29,986 | | 77,435 | |
Gains percentage of net assets | 0.20% | | 0.50% | |
Losses | -5,329 | | -160,551 | |
Loss percentage of net assets | 0.00% | [1] | -1.10% | |
SERIES B | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 190,579 | | 349,361 | |
Gains percentage of net assets | 1.50% | | 2.40% | |
Losses | -78,207 | | -260,633 | |
Loss percentage of net assets | -0.60% | | -1.80% | |
SERIES B | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -306 | | -32 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
SERIES B | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 27,463 | | 78,400 | |
Gains percentage of net assets | 0.20% | | 0.50% | |
Losses | -13,607 | | -4,524 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES B | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 3,814 | | 100,349 | |
Gains percentage of net assets | 0.00% | [1] | 0.70% | |
Losses | -1,804 | | -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 | ' | | 73,609 | |
Gains percentage of net assets | ' | | 0.50% | |
Losses | -444 | | -165 | |
Loss percentage of net assets | 0.00% | [1] | 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 | -48,651 | | -12,902 | |
Loss percentage of net assets | -0.40% | | -0.10% | |
SERIES B | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 158,502 | | 96,891 | |
Gains percentage of net assets | 1.20% | | 0.70% | |
Losses | -1,589 | | -232,250 | |
Loss percentage of net assets | 0.00% | [1] | -1.60% | |
SERIES B | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 800 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | ($11,806) | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
|
[1] | Due to rounding |