XML 47 R59.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Employee Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 27, 2014 | Sep. 28, 2013 | Sep. 29, 2012
Investment Profit Sharing Plan [Member] |  |  |
Postemployment and Postretirement Benefit Plans [Line Items] |  |  |
Operating and administrative expenses | $ 1,400 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_InvestmentProfitSharingPlanMember | $ 1,300 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_InvestmentProfitSharingPlanMember | $ 1,300 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_InvestmentProfitSharingPlanMember
Nonqualified Investment Plan [Member] |  |  |
Postemployment and Postretirement Benefit Plans [Line Items] |  |  |
Operating and administrative expenses | 84 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_NonqualifiedInvestmentPlanMember | 77 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_NonqualifiedInvestmentPlanMember | 71 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_NonqualifiedInvestmentPlanMember
Cash Bonuses [Member] |  |  |
Postemployment and Postretirement Benefit Plans [Line Items] |  |  |
Operating and administrative expenses | $ 9,200 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_CashBonusesMember | $ 9,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_CashBonusesMember | $ 10,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = imkta_CashBonusesMember

X
- Details
Name: | imkta_PostemploymentAndPostretirementBenefitPlansLineItems
Namespace Prefix: | imkta_
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_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=imkta_CashBonusesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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