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Employee Benefit Plans - Total Route Pension Liability (Detail) - USD ($) $ in Thousands | Jun. 25, 2015 | Jun. 26, 2014
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Route Pension Liability [Abstract] |  |
Route pension liability | $ 530 | $ 590

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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: | credit
Period Type: | instant

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- Definition Route pension liability. + References No definition available. + Details
Name: | jbss_RoutePensionLiabilityAbstract
Namespace Prefix: | jbss_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration