Document and Entity Information	0 Months Ended
	Sep. 30, 2014
Risk/Return:
Document Type	485BPOS
Document Period End Date	Sep. 30, 2014
Registrant Name	ADVISORS SERIES TRUST
Central Index Key	0001027596
Amendment Flag	false
Document Creation Date	Jan. 26, 2015
Document Effective Date	Jan. 28, 2015
Prospectus Date	Jan. 28, 2015
Class I Prospectus | Alpha Defensive Alternatives Fund | Class I
Risk/Return:
Trading Symbol	ACDEX
Class I Prospectus | Alpha Opportunistic Alternatives Fund | Class I
Risk/Return:
Trading Symbol	ACOPX