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

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