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Label Element Value
Pzena Small Cap Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading Pzena Small Cap Value Fund
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
Pzena Small Cap Value Fund
Investor Class PZVSX
Institutional Class PZISX

Supplement dated June 1, 2022 to the
Prospectus dated June 28, 2021, as supplemented

Effective June 1, 2022, the Board of Trustees of Advisors Series Trust approved an amendment to the Operating Expense Limitation Agreement between the Trust, on behalf of the Pzena Small Cap Value Fund (the “Fund”) and Pzena Investment Management, LLC (the “Adviser”), as investment adviser of the Fund, pursuant to which the Adviser has agreed to reduce the operating expense limit for the Fund from 1.10% to 1.00%.

The following disclosures in the Prospectus are hereby revised to reflect the change to the operating expense limit of the Fund:

Page 9 – “Fees and Expenses of the Fund”
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 28, 2023
Expense Example [Heading] rr_ExpenseExampleHeading The following replaces the expense example on Page 10 of the Prospectus:Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same (taking into account the Expense Cap only in the first year).
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Supplement Closing [Text Block] ck000102759_SupplementClosingTextBlock Please retain this Supplement with your Prospectus for future reference.
Pzena Small Cap Value Fund | Investor  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol PZVSX
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.95%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Shareholder Servicing Plan Fee rr_Component1OtherExpensesOverAssets 0.10%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.52% [1]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.35%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 137
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 464
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 813
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,798
Pzena Small Cap Value Fund | Institutional  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol PZISX
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.95%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder Servicing Plan Fee rr_Component1OtherExpensesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.22%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.17% [1]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 355
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 627
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,405
[1] Total Annual Fund Operating Expenses reflect the maximum Rule 12b-1 fee and/or Shareholder Servicing Plan fee allowed, while the Expense Ratios in the Financial Highlights section of the statutory prospectus reflect actual operating expenses of the Small Cap Value Fund.
[2] Pzena Investment Management, LLC (the “Adviser”) has contractually agreed to waive a portion or all of its management fees and pay Small Cap Fund expenses to ensure that Total Annual Fund Operating Expenses (excluding AFFE, interest expense, taxes, dividends on securities sold short, extraordinary expenses, Rule 12b-1 fees, shareholder servicing fees and any other class-specific expenses) do not exceed 1.00% of average daily net assets of the Fund (the “Expense Cap”). Prior to June 1, 2022, the Expense Cap was 1.10% of average daily net assets of the Fund. Accordingly, the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement does not match the information provided in the Financial Highlights. The Expense Cap will remain in effect through at least June 28, 2023, and may be terminated only by the Fund’s Board of Trustees (the “Board”). The Adviser may request recoupment of previously waived fees and paid expenses from the Fund for 36 months from the date they were waived or paid, subject to the Expense Cap.