Alger Small Cap Growth Portfolio Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Class I2 [Member] | Alger Small Cap Growth Portfolio | Class I-2 | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.91% | 8.13% | 16.49% | (38.01%) | (6.06%) | 67.15% | 29.34% | 1.44% | 28.73% | 6.24% |