Document and Entity Information	9 Months Ended
Mar. 26, 2015	Apr. 20, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 26, 2015
Document Fiscal Year Focus	2015
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	--06-25
Entity Filer Category	Accelerated Filer
Common Stock, Non-Cumulative Voting Rights of One Vote Per Share [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		8,539,580
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,597,426

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End date of current fiscal year in the format --MM-DD.

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This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.

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This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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