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Transactions With Related Parties (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jun. 28, 2012 | Jun. 30, 2011 | Jun. 24, 2010
Purchases from related entity |  |  |
Purchases from related party | $ 11,474 | $ 11,187 | $ 11,000

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

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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration