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Document and Entity Information	9 Months Ended
	Mar. 28, 2013	Apr. 24, 2013 Class A Common Stock [Member]	Apr. 24, 2013 Common Stock [Member]
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	JBSS
Entity Registrant Name	SANFILIPPO JOHN B & SON INC
Entity Central Index Key	0000880117
Current Fiscal Year End Date	--06-27
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		2,597,426	8,390,080

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