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Long-term Debt - Long-term Debt (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 27, 2013
Mortgage Facility Tranche A [Member]
Debt Instrument [Line Items]
Interest rate	7.63%
Monthly principal installment	$ 200
Final principal payment	600
Mortgage Facility Tranche B [Member]
Debt Instrument [Line Items]
Monthly principal installment	50
Mortgage facility interest	One month LIBOR plus 4.00% per annum or 5.00%
Interest rate added to LIBOR	4.00%
Minimum interest rate	5.00%
Final principal payment	150
Industrial Development Bonds [Member]
Debt Instrument [Line Items]
Cost aggregating industrial development bonds, collateralized by building, machinery and equipment	8,000
Selma, Texas properties [Member]
Debt Instrument [Line Items]
Monthly principal installment	121
Equipment Loan Collateralized by Machinery and Equipment [Member]
Debt Instrument [Line Items]
Monthly principal installment	$ 30

X

- Definition

Amount of final principal payment.

+ References

No definition available.

+ Details

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

X

- Definition

Debt Instrument Floor Interest Rate

+ References

No definition available.

+ Details

Name:	jbss_DebtInstrumentFloorInterestRate
Namespace Prefix:	jbss_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Definition

Amount of the required periodic payments applied to principal.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
Period Type:	instant