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

X

- 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

X

- 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