Cash Flow Information (Details) (USD $)	12 Months Ended
Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Cash Flow Information [Abstract]
Interest (net of amounts capitalized)	$ 46,886,468us-gaap_InterestPaidNet	$ 65,281,861us-gaap_InterestPaidNet	$ 61,269,522us-gaap_InterestPaidNet
Income taxes	32,064,452us-gaap_IncomeTaxesPaidNet	(2,470,362)us-gaap_IncomeTaxesPaidNet	21,390,331us-gaap_IncomeTaxesPaidNet
Property and equipment additions included in accounts payable	$ 8,555,952	$ 14,598,996	$ 7,957,599

Non cash or part non cash acquisition value of property and equipment acquired included in accounts payable.

No definition available.

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Namespace Prefix:	imkta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration