Amount available for letter of credit usage.

No definition available.

Name:	jbss_AmountAvailableForLetterOfCreditUsage
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of excess availability required under the credit facility after the declaration of dividends.

+ References

No definition available.

+ Details

Name:	jbss_ExcessCreditAvailability
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of cash dividend or distribution allowed per quarter without obtaining bank consent.

+ References

No definition available.

+ Details

Name:	jbss_NumberOfCashDividendOrDistributionWithoutObtainingBankConsent
Namespace Prefix:	jbss_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase in percentage of outstanding accounts receivable from a major customer that can be included in the eligible borrowing base calculation.

+ References

No definition available.

+ Details

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

- Definition

Reduction in basis points of interest rates charged for loan advances and letter of credit borrowings.

+ References

No definition available.

+ Details

Name:	jbss_ReductionInBasisPointsOfInterestRatesChargedForLoanAdvancesAndLetterOfCreditBorrowings
Namespace Prefix:	jbss_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate amount of dividends, distributions, purchases, acquisitions, redemptions and retirements allowed per year.

+ References

No definition available.

+ Details

Name:	jbss_StockAuthorizedToBePurchasedAcquiredRedeemedOrRetiredInAnyFiscalQuarter
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate charged for unused line fee per annum.

+ References

No definition available.

+ Details

Name:	jbss_UnusedLineFeeChargedPerAnnum
Namespace Prefix:	jbss_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

Reference 3: 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(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LinesOfCreditCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=jbss_SeventhAmendmentToCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Credit Facility - Additional Information (Detail)	Jul. 07, 2016 USD ($) Dividends	Dec. 29, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 24, 2015 USD ($)
Debt Instrument [Line Items]
Revolving credit facility borrowings		$ 12,427,000	$ 12,084,000	$ 13,932,000
Seventh Amendment To Credit Agreement [Member]
Debt Instrument [Line Items]
Extended maturity date on credit agreement	Jul. 07, 2021
Reduction in basis points of interest rates charged for loan advances and letter of credit borrowings	0.25%
Unused line fee rate charged per annum	0.25%
Excess availability required under the credit facility	$ 30,000
Additional percentage of outstanding accounts receivable to be included in the borrowing base calculation	5.00%
Seventh Amendment To Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Stock authorized to be purchased, acquired, redeemed, or retired in any fiscal quarter without bank consent	$ 60,000
Amount available for letter of credit usage	$ 10,000
Number of cash or stock dividends that may be declared in each quarter without obtaining bank consent \| Dividends	1
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available credit under the Credit Facility		101,398,000
Revolving credit facility borrowings		12,427,000
Outstanding letters of credit		$ 3,675,000