Shareholder Report, Line Graph (Details) 190902_Boston Partners All-Cap Value 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 | $ 24,007 | $ 22,095 | $ 18,603 | $ 16,658 | $ 17,352 | $ 12,432 | $ 12,359 | $ 12,995 | $ 11,456 | $ 10,000 | $ 30,134 |
| 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 3000 Value Total Return [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Value Total Return Index | ||||||||||
| Accumulated Value | $ 23,212 | $ 21,271 | $ 17,576 | $ 16,242 | $ 17,369 | $ 12,607 | $ 12,559 | $ 12,629 | $ 11,173 | $ 10,000 | $ 30,124 |