Alger International Opportunities 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 International Opportunities Fund | Class Z | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 19.02% | 5.68% | 18.56% | (30.66%) | 9.14% | 43.76% | 28.28% | (20.53%) | 27.27% | (5.03%) |