S000003467 [Member] Investment Objectives and Goals - Sit Tax-Free Income Fund |
Mar. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | SUMMARY INFORMATION SIT TAX‑FREE INCOME FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Sit Tax‑Free Income Fund (the “Fund”) seeks high current income that is exempt from federal income tax consistent with preservation of capital.
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