Alger Focus Equity 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 |
|
| Class Y Shares [Member] | Alger Focus Equity Fund | Class Y | ||||||||
| Prospectus [Line Items] | ||||||||
| Annual Return [Percent] | 40.42% | 52.28% | 44.69% | (35.72%) | 20.04% | 46.13% | 34.29% | 1.68% |