Shareholder Report, Line Graph (Details) 190901_Boston Partners Small Cap Value II Fund_Investor Class_TSR Annual {Investor Class} - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 31, 2025 |
Aug. 31, 2024 |
Aug. 31, 2023 |
Aug. 31, 2022 |
Aug. 31, 2021 |
Aug. 31, 2020 |
Aug. 31, 2019 |
Aug. 31, 2018 |
Aug. 31, 2017 |
Aug. 31, 2016 |
Aug. 31, 2026 |
|
| Investor Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Investor Class | ||||||||||
| Accumulated Value | $ 20,846 | $ 18,832 | $ 15,852 | $ 14,828 | $ 16,315 | $ 10,594 | $ 11,524 | $ 12,833 | $ 11,068 | $ 10,000 | $ 24,187 |
| Russell 3000 Total Return Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Total Return Index | ||||||||||
| Accumulated Value | 33,220 | 28,677 | 22,734 | 19,810 | 22,845 | 17,171 | 14,139 | 13,956 | 11,606 | 10,000 | $ 39,898 |
| Russell 2000 Value Total Return Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 2000 Value Total Return Index | ||||||||||
| Accumulated Value | $ 20,097 | $ 18,991 | $ 15,926 | $ 15,587 | $ 17,354 | $ 10,881 | $ 11,593 | $ 13,621 | $ 11,347 | $ 10,000 | $ 26,117 |