Shareholder Report, Average Annual Return (Details)
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6 Months Ended |
12 Months Ended |
60 Months Ended |
120 Months Ended |
Jun. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2026 |
| C000010464 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
16.96%
|
21.98%
|
10.21%
|
5.40%
|
| C000010465 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
21.33%
|
26.12%
|
10.47%
|
5.10%
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| C000039064 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.36%
|
10.24%
|
4.63%
|
2.85%
|
| C000039065 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.99%
|
13.85%
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4.88%
|
2.59%
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| C000010439 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
0.08%
|
3.67%
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(0.68%)
|
1.68%
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| C000010440 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.67%
|
7.07%
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(0.45%)
|
1.43%
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| Without Sales Load [Member] | C000010464 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.79%
|
28.06%
|
11.30%
|
5.91%
|
| Without Sales Load [Member] | C000010465 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.33%
|
27.12%
|
10.47%
|
5.10%
|
| Without Sales Load [Member] | C000010463 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.79%
|
28.09%
|
11.29%
|
5.91%
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| Without Sales Load [Member] | C000039064 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.41%
|
15.76%
|
5.66%
|
3.36%
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| Without Sales Load [Member] | C000039065 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.99%
|
14.85%
|
4.88%
|
2.59%
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| Without Sales Load [Member] | C000038557 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.40%
|
15.81%
|
5.66%
|
3.38%
|
| Without Sales Load [Member] | C000088408 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
6.50%
|
16.06%
|
5.95%
|
3.63%
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| Without Sales Load [Member] | C000010439 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.07%
|
8.83%
|
0.28%
|
2.17%
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| Without Sales Load [Member] | C000010440 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.67%
|
8.05%
|
(0.45%)
|
1.43%
|
| Without Sales Load [Member] | C000010438 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.09%
|
8.82%
|
0.29%
|
2.19%
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| Without Sales Load [Member] | C000088407 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
5.20%
|
9.16%
|
0.55%
|
2.43%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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|
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| Average Annual Return [Line Items] |
|
|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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| Average Annual Return [Line Items] |
|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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|
|
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| Average Annual Return [Line Items] |
|
|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P 500 Index |
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|
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| Average Annual Return [Line Items] |
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|
|
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| Average Annual Return, Percent |
10.21%
|
22.33%
|
13.41%
|
15.51%
|
| S&P Goldman Sachs Commodity Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
23.92%
|
30.23%
|
13.35%
|
7.37%
|
| S&P Goldman Sachs Commodity Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
23.92%
|
30.23%
|
13.35%
|
7.37%
|
| S&P Goldman Sachs Commodity Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
23.92%
|
30.23%
|
13.35%
|
7.37%
|
| ICE BofA 3-Month U.S. Treasury Bill Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.74%
|
3.84%
|
3.52%
|
2.34%
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| ICE BofA 3-Month U.S. Treasury Bill Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.74%
|
3.84%
|
3.52%
|
2.34%
|
| ICE BofA 3-Month U.S. Treasury Bill Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.74%
|
3.84%
|
3.52%
|
2.34%
|
| ICE BofA 3-Month U.S. Treasury Bill Index |
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| Average Annual Return [Line Items] |
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|
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| Average Annual Return, Percent |
1.74%
|
3.84%
|
3.52%
|
2.34%
|
| HFRX Global Hedge Fund Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.80%
|
9.66%
|
3.08%
|
3.65%
|
| HFRX Global Hedge Fund Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.80%
|
9.66%
|
3.08%
|
3.65%
|
| HFRX Global Hedge Fund Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.80%
|
9.66%
|
3.08%
|
3.65%
|
| HFRX Global Hedge Fund Index |
|
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| Average Annual Return [Line Items] |
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|
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| Average Annual Return, Percent |
4.80%
|
9.66%
|
3.08%
|
3.65%
|