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Dividends	9 Months Ended
	Jun. 25, 2011
Dividends
Dividends	H. DIVIDENDS The Company paid cash dividends of $0.165 for each share of Class A Common Stock and $0.15 for each share of Class B Common Stock on April 21, 2011, January 20, 2011 and October 21, 2010 to stockholders of record on April 7, 2011, January 6, 2011 and October 7, 2010, respectively.

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- Definition

This element represents the payment of the entity's earnings in the form of dividends to common shareholders.

+ Details

Name:	imkta_DividendsTextBlock
Namespace Prefix:	imkta
Data Type:	us-types:textBlockItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_DividendsAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration