Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
120 Months Ended |
Jun. 30, 2026 |
Jun. 30, 2026 |
Jun. 30, 2026 |
| C000009596 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Balanced Fund
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| C000009600 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Dividend Growth Fund - Class I
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| C000033658 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Dividend Growth Fund - Class S
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| C000069003 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Global Dividend Growth Fund - Class I
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| C000071096 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Global Dividend Growth Fund - Class S
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| C000170242 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit ESG Growth Fund - Class I
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| C000170243 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit ESG Growth Fund - Class S
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| C000153295 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Small Cap Dividend Growth Fund - Class I
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| C000153296 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Small Cap Dividend Growth Fund - Class S
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| C000009598 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Small Cap Growth Fund
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| C000009595 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit International Growth Fund
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| C000009597 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Sit Developing Markets Growth Fund
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| Without Sales Load [Member] | C000009596 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
11.94%
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7.45%
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10.47%
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| Without Sales Load [Member] | C000009600 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
19.34%
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11.24%
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13.10%
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| Without Sales Load [Member] | C000033658 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
19.01%
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10.95%
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12.81%
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| Without Sales Load [Member] | C000069003 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
17.29%
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10.57%
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11.75%
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| Without Sales Load [Member] | C000071096 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
16.98%
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10.28%
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11.46%
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| Without Sales Load [Member] | C000170242 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
14.17%
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10.20%
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11.95%
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| Without Sales Load [Member] | C000170243 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
13.88%
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9.92%
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11.67%
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| Without Sales Load [Member] | C000153295 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
32.90%
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10.21%
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11.26%
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| Without Sales Load [Member] | C000153296 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
32.62%
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9.94%
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10.97%
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| Without Sales Load [Member] | C000009598 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
33.94%
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6.42%
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11.91%
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| Without Sales Load [Member] | C000009595 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
16.43%
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6.11%
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8.42%
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| Without Sales Load [Member] | C000009597 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
45.95%
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8.32%
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10.64%
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| Bloomberg U.S. Aggregate Bond Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.79%
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0.08%
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1.54%
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| S&P 500® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.32%
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13.41%
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15.51%
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| S&P 500® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.32%
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13.41%
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15.51%
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| MSCI World Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
21.34%
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11.47%
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13.14%
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| MSCI World Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
21.34%
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11.47%
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13.14%
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| MSCI World Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
21.34%
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11.47%
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13.14%
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| MSCI World Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
21.34%
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11.47%
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13.14%
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| Russell 3000® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.82%
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12.31%
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15.06%
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| Russell 3000® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.82%
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12.31%
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15.06%
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| Russell 3000® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.82%
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12.31%
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15.06%
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| MSCI EAFE Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
20.23%
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9.05%
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9.66%
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| MSCI Emerging Markets Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
40.90%
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4.62%
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7.52%
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| S&P 500® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
22.32%
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13.41%
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15.51%
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| Russell 2000® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
40.78%
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6.98%
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11.62%
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| Russell 2000® Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
40.78%
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6.98%
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11.62%
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| Russell 2000® Growth Index |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
38.74%
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5.57%
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11.97%
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