Annual Total Returns - Investor Class |
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 |
|
| HEARTLAND MID CAP VALUE FUND | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 0.12% | 3.62% | 13.37% | (3.01%) | 28.12% | 6.93% | 25.30% | (8.58%) | 8.11% | 28.67% |
| HEARTLAND VALUE PLUS FUND | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 1.06% | (0.31%) | 1.83% | (4.95%) | 24.85% | 12.64% | 26.02% | (13.13%) | 9.81% | 26.77% |
| HEARTLAND VALUE FUND | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 15.98% | 15.68% | 17.13% | (9.99%) | 21.81% | 13.14% | 17.96% | (12.15%) | 8.42% | 16.31% |