Annual Fund Operating Expenses |
Feb. 27, 2026 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Institutional Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.25% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.16% | [1] | ||||||||||||||||
| Fee Waiver or Reimbursement | 0.00% | [2] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.16% | [1],[2] | ||||||||||||||||
| THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Investor Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.23% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.39% | [1] | ||||||||||||||||
| Fee Waiver or Reimbursement | 0.00% | [2] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.39% | [1],[2] | ||||||||||||||||
| THIRD AVENUE VALUE FUND | THIRD AVENUE VALUE FUND Z Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.18% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.09% | [1] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.02%) | [2] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.07% | [1],[2] | ||||||||||||||||
| THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Institutional Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.33% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.03% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.26% | [3] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.07%) | [4] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.19% | [3],[4] | ||||||||||||||||
| THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Investor Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.33% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.03% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.51% | [3] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.07%) | [4] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.44% | [3],[4] | ||||||||||||||||
| THIRD AVENUE SMALL-CAP VALUE FUND | THIRD AVENUE SMALL-CAP VALUE FUND Z Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.03% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.20% | [3] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.11%) | [4] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.09% | [3],[4] | ||||||||||||||||
| THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Institutional Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.18% | [5] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.01%) | [6] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.17% | [5],[6] | ||||||||||||||||
| THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Investor Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.27% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.43% | [5] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.01%) | [6] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.42% | [5],[6] | ||||||||||||||||
| THIRD AVENUE REAL ESTATE VALUE FUND | THIRD AVENUE REAL ESTATE VALUE FUND Z Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.20% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.11% | [5] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.04%) | [6] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.07% | [5],[6] | ||||||||||||||||
| Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Institutional Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.61% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.52% | [7] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.51%) | [8] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.01% | [7],[8] | ||||||||||||||||
| Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Investor Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.61% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.77% | [7] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.51%) | [8] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.26% | [7],[8] | ||||||||||||||||
| Third Avenue International Real Estate Value Fund | Third Avenue International Real Estate Value Fund Z Class | ||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.90% | |||||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.55% | |||||||||||||||||
| Acquired Fund Fees and Expenses | 0.01% | |||||||||||||||||
| Expenses (as a percentage of Assets) | 1.46% | [7] | ||||||||||||||||
| Fee Waiver or Reimbursement | (0.45%) | [8] | ||||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.01% | [7],[8] | ||||||||||||||||
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