XML 69 R58.htm IDEA: XBRL DOCUMENT
v3.23.3

Fair Values of Financial Instruments (Carrying Amount and Fair Value of Debt, Interest Rate Swap and Non-Qualified Plan Assets) (Details) - Level 2 [Member] $ in Thousands | Sep. 30, 2023 USD ($)
--- | ---
Carrying Amount [Member] | Non-Qualified Retirement Plan [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | $ 20,074
Carrying Amount [Member] | Interest Rate Swap [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 17,515
Fair Value [Member] | Non-Qualified Retirement Plan [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 20,074
Fair Value [Member] | Interest Rate Swap [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 17,515
Senior Notes Due 2031 [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 350,000
Senior Notes Due 2031 [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 287,875
Facility Bonds Due 2036 [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 54,440
Facility Bonds Due 2036 [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 54,440
Secured Notes Payable and Other [Member] | Carrying Amount [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | 145,718
Secured Notes Payable and Other [Member] | Fair Value [Member] |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Debt | $ 145,718

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

X
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=imkta_FacilityBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=imkta_SecuredNotesPayableAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |