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Supplementary Quarterly Data (Unaudited) - Unaudited Quarterly Consolidated Financial Data (Parenthetical) (Detail) $ in Thousands	3 Months Ended
	Jun. 26, 2014 USD ($)
Quarterly Financial Information Disclosure [Abstract]
Increase in cost of sales due to a change in the estimate of on-hand quantities of bulk-stored inshell pecan and walnut inventories	$ 400

X

- Definition

Increase decrease in cost of sales.

+ References

No definition available.

+ Details

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Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_QuarterlyFinancialInformationDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration