Shareholder Report, Line Graph (Details) 190902_Boston Partners All-Cap Value 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] | |||||||||||
| Accumulated Value | $ 245,538 | $ 225,461 | $ 189,392 | $ 169,100 | $ 175,700 | $ 125,581 | $ 124,537 | $ 130,615 | $ 114,877 | $ 100,000 | $ 309,023 |
| 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 3000 Value Total Return Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Value Total Return Index | ||||||||||
| Accumulated Value | $ 232,123 | $ 212,713 | $ 175,763 | $ 162,425 | $ 173,694 | $ 126,071 | $ 125,587 | $ 126,291 | $ 111,726 | $ 100,000 | $ 301,235 |