Annual Total Returns - Institutional 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 |
|
| Boston Partners All-Cap Value Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 17.52% | 9.99% | 12.41% | (2.42%) | 25.59% | 4.12% | 27.88% | (11.87%) | 17.87% | 14.82% |
| Boston Partners Global Equity Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 34.02% | 7.21% | 14.11% | (3.07%) | 21.76% | 3.26% | 18.77% | (13.15%) | 20.37% | 8.50% |
| Boston Partners Long/Short Equity Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 28.32% | 13.28% | 15.20% | 7.20% | 32.03% | (6.35%) | 9.12% | (15.47%) | 2.77% | 22.48% |
| Boston Partners Long/Short Research Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 14.96% | 13.48% | 4.74% | 6.48% | 23.80% | (8.25%) | 12.58% | (10.59%) | 10.10% | 3.62% |
| Boston Partners Small Cap Value Fund II | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.50% | 14.02% | 16.68% | (11.49%) | 25.78% | 1.60% | 28.02% | (16.34%) | 9.78% | 25.97% |
| WPG Partners Select Small Cap Value Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 6.63% | 7.95% | 19.73% | 3.46% | ||||||
| WPG Partners Small Cap Value Diversified Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 10.57% | 14.30% | 2.04% | 40.06% | (1.31%) | 23.35% | (21.77%) | 5.68% | 19.63% | (13.74%) |