S000028691 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 188 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Russell Midcap® Growth Index (reflects no deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.66% | 6.65% | 12.49% | |
| Russell 3000® Index (reflects no deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.15% | 13.15% | 14.29% | |
| Class 1 | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 10.40% | 7.16% | 12.18% | |
| Performance Inception Date | May 07, 2010 | |||
| Class 2 | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 10.12% | 6.89% | 11.90% | |
| Performance Inception Date | May 07, 2010 |