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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2019
Entity Registrant Name dei_EntityRegistrantName ADVISORS SERIES TRUST
Entity Central Index Key dei_EntityCentralIndexKey 0001027596
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Mar. 04, 2020
Document Effective Date dei_DocumentEffectiveDate Mar. 04, 2020
Prospectus Date rr_ProspectusDate Mar. 04, 2020
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Edgar Lomax Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading EDGAR LOMAX VALUE FUND
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks long-term capital growth while providing some income.
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 and hold shares of the Fund.
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 2/27/2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 23.83% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 23.83%
Expense Example [Heading] rr_ExpenseExampleHeading 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:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies of the Fund
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Advisor uses a disciplined approach to select stocks for the Fund’s portfolio that it believes are undervalued and have prospects for continued consistent growth. The Advisor uses fundamental analysis of financial statements to select stocks of issuers that generally have low price/earnings and price/book ratios as well as strong balance sheet ratios and high and/or stable dividend yields.
The Fund invests primarily in large, well-recognized companies. Currently, the Advisor expects the Fund’s portfolio to hold at least 20% of the stocks comprising the Standard & Poor’s (“S&P”) 100 Index, a capitalization-weighted index of 100 stocks from a broad range of industries. Under normal market conditions, the Fund will invest at least 85% of its total assets in equity securities, consisting of common stocks and other securities which have the characteristics of common stocks, including, but not limited to, convertible securities, exchange-traded funds (“ETFs”), rights and warrants.
The Advisor may choose to sell a security when it believes the security no longer offers attractive returns or when the Advisor wishes to take advantage of a better investment opportunity.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
By itself, the Fund is not a complete, balanced investment plan. The Fund cannot guarantee that it will achieve its investment objectives. You may lose money by investing in the Fund. The Fund is subject to the following principal risks:
Equity Securities Risk. The value of the Fund’s shares will go up or down based on the movement of the overall stock market and the value of the individual securities held by the Fund, both of which can sometimes be volatile.
Market and Regulatory Risk.  Events in the financial markets and economy may cause volatility and uncertainty and adversely impact the Fund’s performance. Market events may affect a single issuer, industry, sector, or the market as a whole. Traditionally liquid investments may experience periods of diminished liquidity. Governmental and regulatory actions, including tax law changes, may also impair portfolio management and have unexpected or adverse consequences on particular markets, strategies or investments.
Management Risk. The skill of the Advisor will play a significant role in the Fund’s ability to achieve its investment objectives.
Value Style Risk. “Value” investing as a strategy may be out of favor in the market for an extended period. Value stocks can perform differently from the market as a whole and from other types of stocks.
Risk Lose Money [Text] rr_RiskLoseMoney You may lose money by investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following performance information provides some indication of the risks of investing in the Fund. The bar chart shows the annual return for the Fund from year to year. The table shows how the Fund’s average annual returns for 1-year, 5-years, and 10-years compare with those of a broad measure of market performance, as well as two indices that reflect the large-cap value segment of the market. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available on the Fund’s website at www.edgarlomax.com or toll-free at 1‑866‑205‑0524.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following performance information provides some indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1‑866‑205‑0524
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.edgarlomax.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns as of December 31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
During the period of time displayed in the bar chart, the Fund’s best quarter was the third quarter 2010, up 12.17%, and its worst quarter was the second quarter 2010, down 10.09%.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel best quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.17%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel worst quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn 10.09%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, taxes, or expenses)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Edgar Lomax Value Fund | S&P 500® Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel S&P 500® Index (reflects no deduction for fees, taxes, or expenses)
1 Year rr_AverageAnnualReturnYear01 31.49%
5 Years rr_AverageAnnualReturnYear05 11.70%
10 Years rr_AverageAnnualReturnYear10 13.56%
Edgar Lomax Value Fund | S&P 500® Value Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel S&P 500® Value Index (reflects no deduction for fees, taxes, or expenses)
1 Year rr_AverageAnnualReturnYear01 31.93%
5 Years rr_AverageAnnualReturnYear05 9.52%
10 Years rr_AverageAnnualReturnYear10 12.16%
Edgar Lomax Value Fund | Lipper Large-Cap Value Funds Index (reflects no deduction for taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Lipper Large-Cap Value Funds Index (reflects no deduction for taxes)
1 Year rr_AverageAnnualReturnYear01 26.48%
5 Years rr_AverageAnnualReturnYear05 8.75%
10 Years rr_AverageAnnualReturnYear10 11.17%
Edgar Lomax Value Fund | Investor Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol LOMAX
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.55%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.42%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.97%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.26%) [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.71%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 73
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 283
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 511
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,166
Annual Return 2010 rr_AnnualReturn2010 13.34%
Annual Return 2011 rr_AnnualReturn2011 8.95%
Annual Return 2012 rr_AnnualReturn2012 7.04%
Annual Return 2013 rr_AnnualReturn2013 31.49%
Annual Return 2014 rr_AnnualReturn2014 15.39%
Annual Return 2015 rr_AnnualReturn2015 (5.31%)
Annual Return 2016 rr_AnnualReturn2016 17.01%
Annual Return 2017 rr_AnnualReturn2017 19.48%
Annual Return 2018 rr_AnnualReturn2018 (3.30%)
Annual Return 2019 rr_AnnualReturn2019 23.27%
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 23.27%
5 Years rr_AverageAnnualReturnYear05 9.55%
10 Years rr_AverageAnnualReturnYear10 12.21%
Edgar Lomax Value Fund | Investor Class | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 22.64%
5 Years rr_AverageAnnualReturnYear05 7.43%
10 Years rr_AverageAnnualReturnYear10 10.64%
Edgar Lomax Value Fund | Investor Class | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 14.21%
5 Years rr_AverageAnnualReturnYear05 7.11%
10 Years rr_AverageAnnualReturnYear10 9.81%
[1] The Edgar Lomax Company (the “Advisor”) has contractually agreed to waive all or a portion of its management fees and pay expenses of the Fund to ensure that Total Annual Fund Operating Expenses (excluding acquired fund fees and expenses (“AFFE”), interest, taxes and extraordinary expenses) do not exceed 0.70% of the Fund’s average daily net assets (the “Expense Cap”). The Expense Cap will remain in effect through at least February 27, 2021, and may be terminated only by the Trust’s Board of Trustees (the “Board”). The Advisor 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. In addition, the Advisor has voluntarily agreed to waive a portion of its management fee contingent upon the Fund’s performance versus the S&P 500® Value Index. If the Advisor waives management fees under this arrangement, it has also agreed to absorb all Fund expenses, other than management fees, AFFE, interest, taxes and extraordinary expenses. The Advisor has agreed to continue this voluntary waiver arrangement through at least February 27, 2021. While this voluntary waiver arrangement may be discontinued at any time after February 27, 2021, the Advisor has no current intention of doing so. With the voluntary waiver arrangement, actual Total Annual Fund Operating Expenses were 0.71% for the fiscal year ended October 31, 2019. For more information, please see the “Management Fee and Voluntary Fee Waiver” section in the statutory prospectus.