v3.26.1
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2026
C000010464                      
Account Value [Line Items]                      
Accumulated Value $ 9,525 $ 8,667 $ 11,060 $ 9,519 $ 6,331 $ 9,907 $ 14,103 $ 11,841 $ 13,407 $ 13,209 $ 16,917
C000010465                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,014 11,416 9,752 6,438 10,000 14,128 11,776 13,232 12,940 16,449
C000010463                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,103 11,617 9,995 6,650 10,400 14,808 12,437 14,079 13,866 17,759
C000039064                      
Account Value [Line Items]                      
Accumulated Value 9,525 8,788 9,272 9,302 9,526 10,061 11,342 11,736 12,339 11,447 13,251
C000039065                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,159 9,594 9,554 9,707 10,180 11,390 11,698 12,214 11,247 12,918
C000038557                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,245 9,759 9,785 10,026 10,590 11,939 12,343 12,979 12,041 13,945
C000088408                      
Account Value [Line Items]                      
Accumulated Value 2,000,000 1,849,450 1,957,440 1,968,731 2,021,080 2,139,475 2,418,104 2,509,715 2,646,891 2,461,741 2,856,994
C000010439                      
Account Value [Line Items]                      
Accumulated Value 9,525 9,589 9,482 9,816 10,358 11,641 11,198 11,195 11,670 10,850 11,808
C000010440                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,994 9,808 10,089 10,565 11,784 11,256 11,166 11,557 10,663 11,521
C000010438                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,069 9,969 10,329 10,898 12,242 11,779 11,778 12,276 11,417 12,423
C000088407                      
Account Value [Line Items]                      
Accumulated Value 2,000,000 2,018,536 1,999,633 2,076,638 2,196,968 2,474,269 2,386,753 2,392,381 2,499,636 2,329,692 2,543,049
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 2,000,000 2,357,922 2,696,851 2,977,793 3,201,279 4,507,213 4,028,737 4,818,129 6,001,274 6,911,288 8,454,232
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 11,790 13,484 14,889 16,006 22,536 20,144 24,091 30,006 34,556 42,271
S&P 500 Index                      
Account Value [Line Items]                      
Accumulated Value 2,000,000 2,357,922 2,696,851 2,977,793 3,201,279 4,507,213 4,028,737 4,818,129 6,001,274 6,911,288 8,454,232
S&P Goldman Sachs Commodity Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,098 11,831 10,471 6,922 10,893 15,799 13,553 15,587 15,627 20,376
S&P Goldman Sachs Commodity Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,098 11,831 10,471 6,922 10,893 15,799 13,553 15,587 15,627 20,376
S&P Goldman Sachs Commodity Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 9,098 11,831 10,471 6,922 10,893 15,799 13,553 15,587 15,627 20,376
ICE BofA 3-Month U.S. Treasury Bill Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,049 10,186 10,421 10,591 10,601 10,619 11,000 11,594 12,137 12,603
ICE BofA 3-Month U.S. Treasury Bill Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,049 10,186 10,421 10,591 10,601 10,619 11,000 11,594 12,137 12,603
ICE BofA 3-Month U.S. Treasury Bill Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,049 10,186 10,421 10,591 10,601 10,619 11,000 11,594 12,137 12,603
ICE BofA 3-Month U.S. Treasury Bill Index                      
Account Value [Line Items]                      
Accumulated Value 2,000,000 2,009,724 2,037,104 2,084,221 2,118,170 2,120,167 2,123,727 2,200,046 2,318,882 2,427,414 2,520,607
HFRX Global Hedge Fund Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,600 10,862 10,650 10,979 12,298 11,669 11,822 12,462 13,054 14,315
HFRX Global Hedge Fund Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,600 10,862 10,650 10,979 12,298 11,669 11,822 12,462 13,054 14,315
HFRX Global Hedge Fund Index                      
Account Value [Line Items]                      
Accumulated Value 10,000 10,600 10,862 10,650 10,979 12,298 11,669 11,822 12,462 13,054 14,315
HFRX Global Hedge Fund Index                      
Account Value [Line Items]                      
Accumulated Value $ 2,000,000 $ 2,120,031 $ 2,172,471 $ 2,130,079 $ 2,195,866 $ 2,459,613 $ 2,333,708 $ 2,364,317 $ 2,492,455 $ 2,610,802 $ 2,862,973