XML 17 R1.htm IDEA: XBRL DOCUMENT v3.5.0.2
Document and Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2016
Aug. 12, 2016
Dec. 24, 2015
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jun. 30, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Trading Symbol JBSS    
Entity Registrant Name SANFILIPPO JOHN B & SON INC    
Entity Central Index Key 0000880117    
Current Fiscal Year End Date --06-30    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 456,365,691
Common Stock, Non-Cumulative Voting Rights of One Vote Per Share [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   8,607,815  
Class A Common Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,597,426