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Employee Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jun. 28, 2012 | Jun. 30, 2011
The total route pension liability |  |
Route pension liability | $ 699 | $ 748

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- Definition Route pension liabilities. + References No definition available. + Details
Name: | jbss_RoutePensionLiabilities
Namespace Prefix: | jbss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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