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Employee Benefit Plans - Additional Information (Detail) $ in Thousands	12 Months Ended
	Jun. 29, 2023 USD ($)
Defined Benefit Plan And Defined Contribution Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 282
Deferred Compensation Liability, Classified, Noncurrent	$ 304
Employee Contribution First Three Percent [Member]
Defined Benefit Plan And Defined Contribution Plan Disclosure [Line Items]
Matching percentage by employer for 401(k) plan contributions	100.00%
Percent of employee contribution under contributory plan	3.00%
Employee Contribution Next Two Percent [Member]
Defined Benefit Plan And Defined Contribution Plan Disclosure [Line Items]
Matching percentage by employer for 401(k) plan contributions	50.00%
Percent of employee contribution under contributory plan	2.00%
Maximum [Member]
Defined Benefit Plan And Defined Contribution Plan Disclosure [Line Items]
Deferral percentage of performance-based compensation	100.00%
Deferral percentage of base salary	80.00%
Maximum length in years that NQDCP benefits may be paid through	10 years

X

- Definition

Deferral percentage of base salary

+ References

No definition available.

+ Details

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Namespace Prefix:	jbss_
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Balance Type:	na
Period Type:	duration

X

- Definition

Deferral percentage of performance-based compensation

+ References

No definition available.

+ Details

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X

- Definition

Defined Benefit Plan and Defined Contribution Plan Disclosure [Line Items]

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Maximum length in years that NQDCP benefits may be paid through

+ References

No definition available.

+ Details

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Namespace Prefix:	jbss_
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Balance Type:	na
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X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

No definition available.

+ Details

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

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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Period Type:	duration

X

- Definition

This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(12))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 325
-SubTopic 30
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481612/325-30-25-1

+ Details

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

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=jbss_EmployeeContributionFirstThreePercentMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Period Type: