v3.26.1
Expense Example
Jul. 03, 2026
USD ($)
Boston Partners All-Cap Value Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 817
Expense Example, with Redemption, 3 Years 2,662
Expense Example, with Redemption, 5 Years 4,665
Expense Example, with Redemption, 10 Years 10,443
Boston Partners All-Cap Value Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 107
Expense Example, with Redemption, 3 Years 345
Expense Example, with Redemption, 5 Years 601
Expense Example, with Redemption, 10 Years 1,336
Boston Partners All-Cap Value Fund | R6 Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 7,558
Expense Example, with Redemption, 3 Years 24,732
Expense Example, with Redemption, 5 Years 43,382
Expense Example, with Redemption, 10 Years 97,328
Boston Partners Global Equity Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 969
Expense Example, with Redemption, 3 Years 3,370
Expense Example, with Redemption, 5 Years 5,961
Expense Example, with Redemption, 10 Years 13,374
Boston Partners Global Equity Fund | R6 Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 8,880
Expense Example, with Redemption, 3 Years 31,190
Expense Example, with Redemption, 5 Years 55,308
Expense Example, with Redemption, 10 Years 124,495
Boston Partners Long/Short Equity Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 1,789
Expense Example, with Redemption, 3 Years 6,001
Expense Example, with Redemption, 5 Years 10,472
Expense Example, with Redemption, 10 Years 22,886
Boston Partners Long/Short Equity Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 204
Expense Example, with Redemption, 3 Years 676
Expense Example, with Redemption, 5 Years 1,175
Expense Example, with Redemption, 10 Years 2,547
Boston Partners Long/Short Research Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 212
Expense Example, with Redemption, 3 Years 655
Expense Example, with Redemption, 5 Years 1,124
Expense Example, with Redemption, 10 Years 2,421
Boston Partners Long/Short Research Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 1,869
Expense Example, with Redemption, 3 Years 5,786
Expense Example, with Redemption, 5 Years 9,955
Expense Example, with Redemption, 10 Years 21,585
Boston Partners Small Cap Value Fund II | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 1,010
Expense Example, with Redemption, 3 Years 3,324
Expense Example, with Redemption, 5 Years 5,824
Expense Example, with Redemption, 10 Years 12,985
Boston Partners Small Cap Value Fund II | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 126
Expense Example, with Redemption, 3 Years 410
Expense Example, with Redemption, 5 Years 716
Expense Example, with Redemption, 10 Years 1,583
Boston Partners Small Cap Value Fund II | R6 Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 9,388
Expense Example, with Redemption, 3 Years 31,045
Expense Example, with Redemption, 5 Years 54,469
Expense Example, with Redemption, 10 Years 121,736
WPG Partners Select Small Cap Value Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 1,121
Expense Example, with Redemption, 3 Years 3,561
Expense Example, with Redemption, 5 Years 6,194
Expense Example, with Redemption, 10 Years 13,720
WPG Partners Small Cap Value Diversified Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 1,121
Expense Example, with Redemption, 3 Years 3,732
Expense Example, with Redemption, 5 Years 6,544
Expense Example, with Redemption, 10 Years $ 14,562