v3.25.4
Expense Example
Feb. 27, 2026
USD ($)
THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Institutional 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
THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 142
Expense Example, with Redemption, 3 Years 440
Expense Example, with Redemption, 5 Years 761
Expense Example, with Redemption, 10 Years 1,669
THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Z Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 109
Expense Example, with Redemption, 3 Years 345
Expense Example, with Redemption, 5 Years 599
Expense Example, with Redemption, 10 Years 1,327
THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 121
Expense Example, with Redemption, 3 Years 393
Expense Example, with Redemption, 5 Years 685
Expense Example, with Redemption, 10 Years 1,516
THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 147
Expense Example, with Redemption, 3 Years 470
Expense Example, with Redemption, 5 Years 817
Expense Example, with Redemption, 10 Years 1,796
THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Z Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 111
Expense Example, with Redemption, 3 Years 370
Expense Example, with Redemption, 5 Years 649
Expense Example, with Redemption, 10 Years 1,445
THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 119
Expense Example, with Redemption, 3 Years 374
Expense Example, with Redemption, 5 Years 648
Expense Example, with Redemption, 10 Years 1,431
THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 145
Expense Example, with Redemption, 3 Years 451
Expense Example, with Redemption, 5 Years 781
Expense Example, with Redemption, 10 Years 1,712
THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Z Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 109
Expense Example, with Redemption, 3 Years 349
Expense Example, with Redemption, 5 Years 608
Expense Example, with Redemption, 10 Years 1,348
Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 103
Expense Example, with Redemption, 3 Years 430
Expense Example, with Redemption, 5 Years 781
Expense Example, with Redemption, 10 Years 1,769
Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 128
Expense Example, with Redemption, 3 Years 508
Expense Example, with Redemption, 5 Years 912
Expense Example, with Redemption, 10 Years 2,042
Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Z Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 103
Expense Example, with Redemption, 3 Years 418
Expense Example, with Redemption, 5 Years 755
Expense Example, with Redemption, 10 Years $ 1,708