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Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified | Sep. 29, 2012
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Commitments and Contingencies [Abstract] |
Construction Commitments | $ 11.2

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- Definition Construction commitments. + References No definition available. + Details
Name: | imkta_ConstructionCommitments
Namespace Prefix: | imkta_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration