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Document And Entity Information (USD $)
 12 Months Ended
Jun. 29, 2014
Sep. 03, 2014
Dec. 29, 2013
Document and Entity Information [Abstract]      
Entity Registrant Name UNIFI INC    
Document Type 10-K    
Current Fiscal Year End Date --06-29    
Entity Common Stock, Shares Outstanding   18,313,959  
Entity Public Float     $ 441,335,143
Amendment Flag false    
Entity Central Index Key 0000100726    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Jun. 29, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY