Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2011
Registrant Name	dei_EntityRegistrantName	ADVISORS SERIES TRUST
Central Index Key	dei_EntityCentralIndexKey	0001027596
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 26, 2012
Document Effective Date	dei_DocumentEffectiveDate	Apr. 29, 2012
Al Frank Fund (Prospectus Summary) | Al Frank Fund | Investor Class
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VALUX
Al Frank Fund (Prospectus Summary) | Al Frank Fund | Advisor Class
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VALAX
Al Frank Dividend Value Fund (Prospectus Summary) | Al Frank Dividend Value Fund | Investor Class
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VALDX
Al Frank Dividend Value Fund (Prospectus Summary) | Al Frank Dividend Value Fund | Advisor Class
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	VALEX