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Significant Accounting Policies (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 28, 2012	Jun. 30, 2011	Jun. 24, 2010
Amortization of introductory funds recorded as a reduction in net sales
Amortization of introductory funds	$ 82	$ 41	$ 1,092

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- Definition

Amortization of introductory funds recorded as a reduction in net sales.

+ References

No definition available.

+ Details

Name:	jbss_AmortizationExpenseReductionInNetSales
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

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