Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| The Disciplined Growth Investors Fund [Member] | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 20.93% | 33.01% | (18.21%) | 9.74% | 24.01% | 23.96% | (2.36%) | 14.89% | 13.12% | (4.62%) |