Document And Entity Information (USD $)	12 Months Ended
	Aug. 27, 2014	Nov. 04, 2014	Feb. 12, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	LUBYS INC
Document Type	10-K
Current Fiscal Year End Date	--08-27
Entity Common Stock, Shares Outstanding		28,466,641
Entity Public Float			$ 120,457,167
Amendment Flag	false
Entity Central Index Key	0000016099
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Aug. 27, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY