Time that must elapse before Company can purchase the properties back from the partnership.

No definition available.

Name:	jbss_BasePeriodForNonPurchaseOfProperties
Namespace Prefix:	jbss_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Disclosure [Line Items]

+ References

No definition available.

+ Details

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

- Definition

Lease Period For Fair Value Rent

+ References

No definition available.

+ Details

Name:	jbss_LeasePeriodForFairValueRent
Namespace Prefix:	jbss_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Lease Period For Fair Value Rent Renewal Option

+ References

No definition available.

+ Details

Name:	jbss_LeasePeriodForFairValueRentRenewalOption
Namespace Prefix:	jbss_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Lease period for renewal options exercised.

+ References

No definition available.

+ Details

Name:	jbss_LeasePeriodForRenewalOptionsExercised
Namespace Prefix:	jbss_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum repurchase price.

+ References

No definition available.

+ Details

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

- Definition

Net Worth To Be Maintained Specified Under Mortgage Facility

+ References

No definition available.

+ Details

Name:	jbss_NetWorthToBeMaintainedSpecifiedUnderMortgageFacility
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage Of Purchase Price On Fair Value

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Purchase Price On Fair Value In Certain Circumstances

+ References

No definition available.

+ Details

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

- Definition

Property Sold To Related Party

+ References

No definition available.

+ Details

Name:	jbss_PropertySoldToRelatedParty
Namespace Prefix:	jbss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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 210.9-03.16)
-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
-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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

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

- 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

+ Details

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

- Definition

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=55761124&loc=SL6224234-111729

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jbss_MortgageFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jbss_MortgageFacilityTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jbss_MortgageFacilityTrancheBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jbss_SelmaTexasFacilityFinancingObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term Debt - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Oct. 01, 2016	Sep. 30, 2006	Jun. 30, 2016	Jun. 25, 2015	Feb. 07, 2008
Mortgage Facility [Member]
Debt Disclosure [Line Items]
Amounts of term loans					$ 45,000,000
Mortgage Facility maturity date			Mar. 01, 2023
Carrying amount of assets pledged as collateral			$ 76,299
Mortgage Facility contain covenants to maintain specified net worth			$ 110,000,000
Mortgage Facility Tranche A [Member]
Debt Disclosure [Line Items]
Amounts of term loans					36,000,000
Mortgage Facility maturity date			Mar. 01, 2023
Interest rate			7.63%
Debt obligation outstanding			$ 16,600,000	$ 19,000,000
Mortgage Facility Tranche B [Member]
Debt Disclosure [Line Items]
Amounts of term loans					$ 9,000,000
Mortgage Facility maturity date			Mar. 01, 2023
Mortgage facility interest			One month LIBOR plus 3.50% per annum or 4.25%
Mortgage Facility interest rate LIBOR			3.50%
Debt instrument fixed rate			4.25%
Debt obligation outstanding			$ 4,150,000	4,750,000
Selma, Texas Properties [Member]
Debt Disclosure [Line Items]
Capital lease recorded as debt obligation		$ 14,300,000
Selling price of Texas properties sold to related party partnerships		$ 14,300,000
Renewal options of Texas properties		Three five-year terms
Lease term of Texas properties		10 years
Option percentage of fair value to purchase the properties			95.00%
Option percentage of fair value to purchase the properties in certain circumstances			100.00%
Option to purchase the properties from the partnerships			5 years
Debt obligation outstanding			$ 11,540,000	$ 11,916,000
Minimum amount accepted for repurchase			$ 14,300,000
Lease period for renewal option excercised			Two five-year term
Selma, Texas Properties [Member] \| Scenario, Forecast [Member]
Debt Disclosure [Line Items]
Renewed lease monthly installments	$ 103,000