Shareholder Report, Line Graph (Details) 190901_Boston Partners Small Cap Value II Fund_Institutional Class_TSR Annual {Institutional 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 |
|
| Institutional Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional Class | ||||||||||
| Accumulated Value | $ 213,206 | $ 192,123 | $ 161,329 | $ 150,530 | $ 165,197 | $ 106,992 | $ 116,145 | $ 128,938 | $ 110,916 | $ 100,000 | $ 248,049 |
| Russell 3000 Total Return Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Total Return Index | ||||||||||
| Accumulated Value | 332,200 | 286,775 | 227,338 | 198,104 | 228,446 | 171,708 | 141,392 | 139,563 | 116,063 | 100,000 | $ 398,985 |
| 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 | $ 200,973 | $ 189,908 | $ 159,257 | $ 155,868 | $ 173,539 | $ 108,807 | $ 115,928 | $ 136,212 | $ 113,465 | $ 100,000 | $ 261,171 |