Document and Entity Information	0 Months Ended
	Nov. 30, 2014
Risk/Return:
Document Type	485BPOS
Document Period End Date	Nov. 30, 2014
Registrant Name	ADVISORS SERIES TRUST
Central Index Key	0001027596
Amendment Flag	false
Document Creation Date	Mar. 30, 2015
Document Effective Date	Mar. 30, 2015
Prospectus Date	Mar. 30, 2015
PIA BBB Bond Fund | Managed Account Completion Shares
Risk/Return:
Trading Symbol	PBBBX
PIA MBS Bond Fund | Managed Account Completion Shares
Risk/Return:
Trading Symbol	PMTGX
PIA Short-Term Securities Fund | Advisor Class
Risk/Return:
Trading Symbol	PIASX
Institutional Class Prospectus | PIA High Yield Fund | Institutional Class
Risk/Return:
Trading Symbol	PHYSX