XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.25.3

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accrued liability for cash bonuses | $ 18,600 | $ 21,500 |
Investment Profit Sharing Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Operating and administrative expenses | 6,300 | 5,700 | $ 5,700
Nonqualified Investment Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Operating and administrative expenses | 511 | 564 | 509
Cash Bonuses [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Operating and administrative expenses | $ 20,500 | $ 29,200 | $ 34,400

X
- Definition Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AccruedEmployeeBenefitsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=imkta_InvestmentProfitSharingPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=imkta_NonqualifiedInvestmentPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=imkta_CashBonusesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |