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Distribution Channel and Product Type Sales Mix - Schedule of Revenue by Distribution Channel (Parenthetical) (Detail) (Sales Revenue, Net [Member])	3 Months Ended		9 Months Ended
	Mar. 26, 2015	Mar. 27, 2014	Mar. 26, 2015	Mar. 27, 2014
Consumer Branded Products [Member]
Distribution Channel Reporting Information [Line Items]
Percentage of total consumer channel sales comprised of sale of branded products	25.00%jbss_PercentageOfBrandedProductsToConsumerSales / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember	27.00%jbss_PercentageOfBrandedProductsToConsumerSales / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember	32.00%jbss_PercentageOfBrandedProductsToConsumerSales / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember	33.00%jbss_PercentageOfBrandedProductsToConsumerSales / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember
Consumer Branded and Private Brand Products [Member] | Export [Member]
Distribution Channel Reporting Information [Line Items]
Percentage of total export channel sales comprised of sale of private brand and branded products	55.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = jbss_ConsumerBrandedAndPrivateBrandProductsMember / us-gaap_StatementBusinessSegmentsAxis = jbss_ExportDistributionChannelMember	50.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = jbss_ConsumerBrandedAndPrivateBrandProductsMember / us-gaap_StatementBusinessSegmentsAxis = jbss_ExportDistributionChannelMember	66.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = jbss_ConsumerBrandedAndPrivateBrandProductsMember / us-gaap_StatementBusinessSegmentsAxis = jbss_ExportDistributionChannelMember	55.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = jbss_ConsumerBrandedAndPrivateBrandProductsMember / us-gaap_StatementBusinessSegmentsAxis = jbss_ExportDistributionChannelMember

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- Definition

Percentage of branded products to consumer sales .

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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