Alger Mid Cap Focus Fund Expense Example - Class A C Shares [Member] - Alger Mid Cap Focus Fund |
Oct. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 636 |
| Expense Example, with Redemption, 3 Years | 871 |
| Expense Example, with Redemption, 5 Years | 1,125 |
| Expense Example, with Redemption, 10 Years | 1,849 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 295 |
| Expense Example, with Redemption, 3 Years | 603 |
| Expense Example, with Redemption, 5 Years | 1,037 |
| Expense Example, with Redemption, 10 Years | $ 2,243 |