Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| S&P 500 Total Return Index® | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 25.02% | 14.53% | 13.10% |
| The Disciplined Growth Investors Fund [Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 20.93% | 12.35% | 10.39% |
| The Disciplined Growth Investors Fund [Member] | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 15.88% | 10.04% | 8.84% |
| The Disciplined Growth Investors Fund [Member] | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 15.94% | 9.52% | 8.23% |