S000003461 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
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| MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | [1] | 31.22% | 8.92% | 8.18% | |
| Sit International Growth Fund | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 22.14% | 6.17% | 6.95% | ||
| Sit International Growth Fund | After Taxes on Distributions | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 21.82% | 5.73% | 6.63% | ||
| Sit International Growth Fund | After Taxes on Distributions and Sales | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 13.33% | 4.76% | 5.56% | ||
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