v3.26.1
Expense Example
May 01, 2026
USD ($)
Impax Large Cap Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 75
Expense Example, with Redemption, 3 Years 233
Expense Example, with Redemption, 5 Years 406
Expense Example, with Redemption, 10 Years 906
Impax Large Cap Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 100
Expense Example, with Redemption, 3 Years 312
Expense Example, with Redemption, 5 Years 542
Expense Example, with Redemption, 10 Years 1,201
Impax Small Cap Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 93
Expense Example, with Redemption, 3 Years 290
Expense Example, with Redemption, 5 Years 504
Expense Example, with Redemption, 10 Years 1,120
Impax Small Cap Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 118
Expense Example, with Redemption, 3 Years 368
Expense Example, with Redemption, 5 Years 638
Expense Example, with Redemption, 10 Years 1,409
Impax Small Cap Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 662
Expense Example, with Redemption, 3 Years 898
Expense Example, with Redemption, 5 Years 1,153
Expense Example, with Redemption, 10 Years 1,881
Impax US Sustainable Economy Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 189
Expense Example, with Redemption, 5 Years 329
Expense Example, with Redemption, 10 Years 738
Impax US Sustainable Economy Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 86
Expense Example, with Redemption, 3 Years 268
Expense Example, with Redemption, 5 Years 466
Expense Example, with Redemption, 10 Years 1,037
Impax US Sustainable Economy Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 631
Expense Example, with Redemption, 3 Years 803
Expense Example, with Redemption, 5 Years 990
Expense Example, with Redemption, 10 Years 1,530
Impax Global Opportunities Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 100
Expense Example, with Redemption, 3 Years 312
Expense Example, with Redemption, 5 Years 542
Expense Example, with Redemption, 10 Years 1,201
Impax Global Opportunities Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 125
Expense Example, with Redemption, 3 Years 390
Expense Example, with Redemption, 5 Years 676
Expense Example, with Redemption, 10 Years 1,489
Impax Global Environmental Markets Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 95
Expense Example, with Redemption, 3 Years 296
Expense Example, with Redemption, 5 Years 515
Expense Example, with Redemption, 10 Years 1,143
Impax Global Environmental Markets Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 120
Expense Example, with Redemption, 3 Years 375
Expense Example, with Redemption, 5 Years 649
Expense Example, with Redemption, 10 Years 1,432
Impax Global Environmental Markets Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 664
Expense Example, with Redemption, 3 Years 904
Expense Example, with Redemption, 5 Years 1,163
Expense Example, with Redemption, 10 Years 1,903
Impax International Sustainable Economy Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 45
Expense Example, with Redemption, 3 Years 141
Expense Example, with Redemption, 5 Years 246
Expense Example, with Redemption, 10 Years 555
Impax International Sustainable Economy Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 70
Expense Example, with Redemption, 3 Years 221
Expense Example, with Redemption, 5 Years 384
Expense Example, with Redemption, 10 Years 859
Impax Core Bond Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 49
Expense Example, with Redemption, 3 Years 154
Expense Example, with Redemption, 5 Years 269
Expense Example, with Redemption, 10 Years 604
Impax Core Bond Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 75
Expense Example, with Redemption, 3 Years 233
Expense Example, with Redemption, 5 Years 406
Expense Example, with Redemption, 10 Years 906
Impax High Yield Bond Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 224
Expense Example, with Redemption, 5 Years 390
Expense Example, with Redemption, 10 Years 871
Impax High Yield Bond Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 303
Expense Example, with Redemption, 5 Years 525
Expense Example, with Redemption, 10 Years 1,166
Impax High Yield Bond Fund | Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 543
Expense Example, with Redemption, 3 Years 739
Expense Example, with Redemption, 5 Years 952
Expense Example, with Redemption, 10 Years 1,564
Impax Sustainable Allocation Fund | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 70
Expense Example, with Redemption, 3 Years 221
Expense Example, with Redemption, 5 Years 384
Expense Example, with Redemption, 10 Years 859
Impax Sustainable Allocation Fund | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 96
Expense Example, with Redemption, 3 Years 300
Expense Example, with Redemption, 5 Years 520
Expense Example, with Redemption, 10 Years $ 1,155