Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| SIT LARGE CAP GROWTH FUND INC | SIT LARGE CAP GROWTH FUND INC | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 15.24% | 26.23% | 39.69% | (28.18%) | 28.54% | 33.94% | 32.81% | (3.11%) | 27.83% | 4.36% |