S000003462 [Member] Average Annual Total Returns

12 Months Ended

60 Months Ended

120 Months Ended

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

7.30%

(0.36%)

2.01%

S&P 500® Index (reflects no deduction for fees, expenses or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

^[2]

17.88%

14.42%

14.82%

Sit Balanced Fund

Prospectus [Line Items]

Average Annual Return, Percent

13.59%

8.80%

10.28%

Sit Balanced Fund | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

12.46%

7.84%

9.33%

Sit Balanced Fund | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

8.46%

6.66%

8.14%

[1]	A broad-based securities market index that represents the overall domestic debt markets.
[2]	A broad-based securities market index that represents the overall domestic equity markets.