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Significant Accounting Policies - Depreciation Expense for Last Three Fiscal Years (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 26, 2014	Jun. 27, 2013	Jun. 28, 2012
Depreciation Expense [Abstract]
Depreciation expense	$ 13,649	$ 13,648	$ 14,062

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- Details

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Namespace Prefix:	jbss_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Balance Type:	debit
Period Type:	duration