Alger Mid Cap Focus Fund Annual Total Returns |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Class A C Shares [Member] | Alger Mid Cap Focus Fund | Class A | ||||
| Prospectus [Line Items] | ||||
| Annual Return [Percent] | 14.98% | 31.46% | 16.57% | (37.39%) |