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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