Alger Mid Cap Growth Institutional Fund Investment Objectives and Goals - Class I R Shares [Member] - Alger Mid Cap Growth Institutional Fund |
Oct. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | <span style="color:#262626;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Alger Mid Cap Growth Institutional Fund</span> |
| Objective [Heading] | <span style="color:#0064FA;font-family:Arial;font-size:10pt;font-weight:bold;">Investment Objective</span> |
| Objective, Primary [Text Block] | Alger Mid Cap Growth Institutional Fund seeks long-term capital appreciation. |