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

X

- 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