S000001258 [Member] Investment Objectives and Goals - INTERMEDIATE TAX-EXEMPT FUND |
Mar. 31, 2026 |
|---|---|
| Prospectus [Line Items] | |
| Risk/Return [Heading] | INTERMEDIATE TAX‑EXEMPT FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Fund seeks to provide a high level of current income exempt from regular federal income tax by investing in municipal instruments.
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