S000002879 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Russell 3000® Index (Reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.15% | 13.15% | 14.29% |
| Russell 2500™ Index (Reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 11.91% | 7.26% | 10.40% |
| Class I | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 11.11% | 7.04% | 11.12% |
| Class III | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 10.87% | 6.77% | 10.85% |