Gross and Net Unrealized Gains and Losses by Long and Short Positions (Detail) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | $817,800 | | $1,344,064 | |
Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -44 | | 122,909 | |
Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 153,049 | | 295,933 | |
Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 147,163 | | 236,020 | |
Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 43,596 | | 196,572 | |
Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 592,965 | | 336,375 | |
Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 39,930 | | -293,501 | |
Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -17,370 | | ' | |
Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -141,489 | | 449,756 | |
Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 1,125,807 | | 1,628,417 | |
Gains percentage of net assets | 4.10% | | 4.70% | |
Losses | -447,541 | | -450,128 | |
Loss percentage of net assets | -1.60% | | -1.30% | |
Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 299,300 | |
Gains percentage of net assets | ' | | 0.90% | |
Losses | ' | | -27,564 | |
Loss percentage of net assets | ' | | -0.10% | |
Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 65,637 | | 148,788 | |
Gains percentage of net assets | 0.20% | | 0.40% | |
Losses | -27,081 | | -153,200 | |
Loss percentage of net assets | -0.10% | | -0.40% | |
Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,949 | | 282,169 | |
Gains percentage of net assets | 0.00% | [1] | 0.80% | |
Losses | -15,428 | | -35,118 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 14,080 | | 1,350 | |
Gains percentage of net assets | 0.10% | | 0.00% | [1] |
Losses | -92,471 | | -110 | |
Loss percentage of net assets | -0.30% | | 0.00% | [1] |
Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 643,153 | | 515,158 | |
Gains percentage of net assets | 2.30% | | 1.50% | |
Losses | -31,623 | | -177,776 | |
Loss percentage of net assets | -0.10% | | -0.50% | |
Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 275,909 | | 201,333 | |
Gains percentage of net assets | 1.00% | | 0.60% | |
Losses | ' | | -56,090 | |
Loss percentage of net assets | ' | | -0.20% | |
Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -17,370 | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 122,079 | | 180,319 | |
Gains percentage of net assets | 0.40% | | 0.50% | |
Losses | -263,568 | | -270 | |
Loss percentage of net assets | -0.90% | | 0.00% | [1] |
Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 567,289 | | 1,302,939 | |
Gains percentage of net assets | 2.00% | | 3.80% | |
Losses | -427,755 | | -1,137,164 | |
Loss percentage of net assets | -1.50% | | -3.30% | |
Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 298 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -44 | | -149,125 | |
Loss percentage of net assets | 0.00% | [1] | -0.40% | |
Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 122,158 | | 305,562 | |
Gains percentage of net assets | 0.40% | | 0.90% | |
Losses | -7,665 | | -5,217 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 176,082 | | 2,470 | |
Gains percentage of net assets | 0.60% | | 0.00% | [1] |
Losses | -18,440 | | -13,501 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 122,152 | | 198,242 | |
Gains percentage of net assets | 0.40% | | 0.60% | |
Losses | -165 | | -2,910 | |
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 | -18,733 | | -1,007 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 146,729 | | 305,050 | |
Gains percentage of net assets | 0.50% | | 0.90% | |
Losses | -382,708 | | -743,794 | |
Loss percentage of net assets | -1.40% | | -2.20% | |
Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 491,317 | |
Gains percentage of net assets | ' | | 1.40% | |
Losses | ' | | -221,610 | |
Loss percentage of net assets | ' | | -0.60% | |
SERIES A | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 293,051 | | 460,446 | |
SERIES A | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -12 | | 26,992 | |
SERIES A | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 55,136 | | 107,588 | |
SERIES A | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 62,076 | | 94,353 | |
SERIES A | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 17,927 | | 71,015 | |
SERIES A | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 219,313 | | 105,969 | |
SERIES A | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 3,604 | | -117,029 | |
SERIES A | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -6,620 | | ' | |
SERIES A | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -58,373 | | 171,558 | |
SERIES A | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 419,558 | | 569,546 | |
Gains percentage of net assets | 3.20% | | 3.50% | |
Losses | -177,313 | | -180,563 | |
Loss percentage of net assets | -1.40% | | -1.10% | |
SERIES A | Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 89,181 | |
Gains percentage of net assets | ' | | 0.50% | |
Losses | ' | | -9,816 | |
Loss percentage of net assets | ' | | -0.10% | |
SERIES A | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 25,369 | | 59,819 | |
Gains percentage of net assets | 0.20% | | 0.40% | |
Losses | -10,850 | | -62,740 | |
Loss percentage of net assets | -0.10% | | -0.40% | |
SERIES A | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 113,718 | |
Gains percentage of net assets | ' | | 0.70% | |
Losses | -5,977 | | -15,228 | |
Loss percentage of net assets | 0.00% | [1] | -0.10% | |
SERIES A | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,790 | | 915 | |
Gains percentage of net assets | 0.00% | [1] | 0.00% | [1] |
Losses | -35,406 | | ' | |
Loss percentage of net assets | -0.30% | | ' | |
SERIES A | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 240,531 | | 176,408 | |
Gains percentage of net assets | 1.90% | | 1.10% | |
Losses | -15,443 | | -70,011 | |
Loss percentage of net assets | -0.10% | | -0.40% | |
SERIES A | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 104,224 | | 69,944 | |
Gains percentage of net assets | 0.80% | | 0.40% | |
Losses | ' | | -22,498 | |
Loss percentage of net assets | ' | | -0.10% | |
SERIES A | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -6,620 | | ' | |
Loss percentage of net assets | -0.10% | | ' | |
SERIES A | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 44,644 | | 59,561 | |
Gains percentage of net assets | 0.30% | | 0.40% | |
Losses | -103,017 | | -270 | |
Loss percentage of net assets | -0.80% | | 0.00% | [1] |
SERIES A | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 217,928 | | 495,417 | |
Gains percentage of net assets | 1.70% | | 3.00% | |
Losses | -167,122 | | -423,954 | |
Loss percentage of net assets | -1.30% | | -2.50% | |
SERIES A | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 65 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -12 | | -52,438 | |
Loss percentage of net assets | 0.00% | [1] | -0.30% | |
SERIES A | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 43,758 | | 112,612 | |
Gains percentage of net assets | 0.30% | | 0.70% | |
Losses | -3,141 | | -2,103 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
SERIES A | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 75,733 | | 1,185 | |
Gains percentage of net assets | 0.60% | | 0.00% | [1] |
Losses | -7,680 | | -5,322 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES A | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 48,543 | | 71,348 | |
Gains percentage of net assets | 0.41% | | 0.40% | |
Losses | ' | | -1,248 | |
Loss percentage of net assets | ' | | 0.00% | [1] |
SERIES A | Short Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 56 | | ' | |
Gains percentage of net assets | 0.00% | [1] | ' | |
Losses | -5,831 | | -428 | |
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 | | 122,925 | |
Gains percentage of net assets | 0.40% | | 0.70% | |
Losses | -150,458 | | -287,400 | |
Loss percentage of net assets | -1.20% | | -1.70% | |
SERIES A | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 187,282 | |
Gains percentage of net assets | ' | | 1.20% | |
Losses | ' | | -75,015 | |
Loss percentage of net assets | ' | | -0.50% | |
SERIES B | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 524,749 | | 883,618 | |
SERIES B | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -32 | | 95,917 | |
SERIES B | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 97,913 | | 188,345 | |
SERIES B | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 85,087 | | 141,667 | |
SERIES B | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 25,669 | | 125,557 | |
SERIES B | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 373,652 | | 230,406 | |
SERIES B | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | 36,326 | | -176,472 | |
SERIES B | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -10,750 | | ' | |
SERIES B | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Net Unrealized Gain (Loss) on Open Positions | -83,116 | | 278,198 | |
SERIES B | Long Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 706,249 | | 1,058,871 | |
Gains percentage of net assets | 4.80% | | 5.90% | |
Losses | -270,228 | | -269,565 | |
Loss percentage of net assets | -1.80% | | -1.50% | |
SERIES B | Long Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 210,119 | |
Gains percentage of net assets | ' | | 1.20% | |
Losses | ' | | -17,748 | |
Loss percentage of net assets | ' | | -0.10% | |
SERIES B | Long Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 40,268 | | 88,969 | |
Gains percentage of net assets | 0.30% | | 0.50% | |
Losses | -16,231 | | -90,460 | |
Loss percentage of net assets | -0.10% | | -0.50% | |
SERIES B | Long Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 4,949 | | 168,451 | |
Gains percentage of net assets | 0.00% | [1] | 0.90% | |
Losses | -9,451 | | -19,890 | |
Loss percentage of net assets | -0.10% | | -0.10% | |
SERIES B | Long Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 9,290 | | 435 | |
Gains percentage of net assets | 0.10% | | 0.00% | [1] |
Losses | -57,065 | | -110 | |
Loss percentage of net assets | -0.40% | | 0.00% | [1] |
SERIES B | Long Position | Indices | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 402,622 | | 338,750 | |
Gains percentage of net assets | 2.70% | | 1.90% | |
Losses | -16,180 | | -107,765 | |
Loss percentage of net assets | -0.10% | | -0.60% | |
SERIES B | Long Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 171,685 | | 131,389 | |
Gains percentage of net assets | 1.20% | | 0.70% | |
Losses | ' | | -33,592 | |
Loss percentage of net assets | ' | | -0.20% | |
SERIES B | Long Position | Livestock | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Losses | -10,750 | | ' | |
Loss percentage of net assets | 0.10% | | ' | |
SERIES B | Long Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 77,435 | | 120,758 | |
Gains percentage of net assets | 0.50% | | 0.70% | |
Losses | -160,551 | | ' | |
Loss percentage of net assets | -1.10% | | ' | |
SERIES B | Short Position | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 349,361 | | 807,522 | |
Gains percentage of net assets | 2.40% | | 4.50% | |
Losses | -260,633 | | -713,210 | |
Loss percentage of net assets | -1.80% | | -3.90% | |
SERIES B | Short Position | Foreign Exchange | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 233 | |
Gains percentage of net assets | ' | | 0.00% | [1] |
Losses | -32 | | -96,687 | |
Loss percentage of net assets | 0.00% | [1] | -0.50% | |
SERIES B | Short Position | Currency | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 78,400 | | 192,950 | |
Gains percentage of net assets | 0.50% | | 1.10% | |
Losses | -4,524 | | -3,114 | |
Loss percentage of net assets | 0.00% | [1] | 0.00% | [1] |
SERIES B | Short Position | Financial | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 100,349 | | 1,285 | |
Gains percentage of net assets | 0.70% | | 0.00% | [1] |
Losses | -10,760 | | -8,179 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES B | Short Position | Food & Fiber | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 73,609 | | 126,894 | |
Gains percentage of net assets | 0.50% | | 0.70% | |
Losses | -165 | | -1,662 | |
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 | -12,902 | | -579 | |
Loss percentage of net assets | -0.10% | | 0.00% | [1] |
SERIES B | Short Position | Metals | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | 96,891 | | 182,125 | |
Gains percentage of net assets | 0.70% | | 1.00% | |
Losses | -232,250 | | -456,394 | |
Loss percentage of net assets | -1.60% | | -2.50% | |
SERIES B | Short Position | Energy | ' | | ' | |
Derivative Instruments, Gain (Loss) [Line Items] | ' | | ' | |
Gains | ' | | 304,035 | |
Gains percentage of net assets | ' | | 1.70% | |
Losses | ' | | ($146,595) | |
Loss percentage of net assets | ' | | -0.90% | |
|
[1] | Due to rounding |