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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Apr. 30, 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 Aug. 14, 2019
Document Effective Date dei_DocumentEffectiveDate Aug. 14, 2019
Prospectus Date rr_ProspectusDate Apr. 30, 2019
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Capital Advisors Growth Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading CAPITAL ADVISORS GROWTH FUND
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
CAPITAL ADVISORS GROWTH FUND

Investor Class CIAOX

a series of Advisors Series Trust

Supplement to the Summary Prospectus and Prospectus, each dated April 30, 2019
_____________________________________________________________________________________


Effective immediately, the Russell 1000® Growth Index is no longer listed as a benchmark index for the Capital Advisors Growth Fund (the "Fund"), for performance comparison purposes. The Fund will continue to list the S&P 500® Index as a comparative benchmark for the Fund.

Also, effective immediately, the following paragraph on page 3 of the Summary Prospectus and Prospectus is restated as follows:
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 returns for the Fund from year to year. The table shows how the Fund’s average annual returns for the 1-year, 5-year and 10-year periods compare with those of a broad measure of market performance. The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future. Updated performance information is available on the Fund’s website at www.capadvfunds.com or by calling the Fund toll-free at 1-866-205-0523."
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 1-866-205-0523
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.capadvfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance, before and after taxes, does not necessarily indicate how it will perform in the future.
Supplement Closing [Text Block] ck0001027596_SupplementClosingTextBlock
All other references contained in the Summary Prospectus and Prospectus to the Russell 1000® Growth Index are hereby removed.





* * * * * * * *

Please retain this Supplement with your Summary Prospectus and Prospectus for future reference.
Capital Advisors Growth Fund | Investor Class  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol CIAOX