Alger Capital Appreciation Fund 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 Z Shares [Member] | Alger Capital Appreciation Fund | Class Z | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 31.62% | 50.28% | 43.58% | (36.56%) | 17.93% | 42.08% | 33.62% | (0.66%) | 31.69% | 0.66% |