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Employee Benefit Plans - Total Route Pension Liability (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jun. 27, 2013 | Jun. 28, 2012
Route Pension Liability [Abstract] |  |
Route pension liability | $ 646 | $ 699

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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