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Significant Accounting Policies (Details 6)	Jun. 28, 2012	Jun. 30, 2011	Jun. 24, 2010
Customers exceeding 10% of net sales
Percentage of net sales	100.00%	100.00%	100.00%
Wal-Mart Stores, Inc [Member]
Customers exceeding 10% of net sales
Percentage of net sales	21.00%	20.00%	19.00%
Target Corporation [Member]
Customers exceeding 10% of net sales
Percentage of net sales	15.00%	12.00%	12.00%

X

- Details

Name:	jbss_ScheduleOfSignificantCustomersAbstract
Namespace Prefix:	jbss_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

+ References

No definition available.

+ Details

Name:	us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant