XML 43 R32.htm IDEA: XBRL DOCUMENT v3.5.0.2

Earnings Per Common Share (Narrative) (Details)	9 Months Ended
	Jun. 25, 2016 item shares
Earnings Per Share [Line Items]
Conversion feature for Class B Common Stock	each share is convertible into one share of Class A Common Stock at any time
Number of shares in conversion | shares	1
Voting rights for shareholders	Each share of Class A Common Stock has one vote per share and each share of Class B Common Stock has ten votes per share
Percentage of cash dividend on Class B Common Stock entitled to receive for each share of Class A Common Stock	110.00%
Class A Common Stock
Earnings Per Share [Line Items]
Number of votes for common stock	1
Class B Common Stock
Earnings Per Share [Line Items]
Number of votes for common stock	10

X

- Definition

Common Stock, Conversion Share

+ References

No definition available.

+ Details

Name:	imkta_CommonStockConversionShare
Namespace Prefix:	imkta_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Earnings Per Share [Line Items]

+ References

No definition available.

+ Details

Name:	imkta_EarningsPerShareLineItems
Namespace Prefix:	imkta_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of votes for common stock holders.

+ References

No definition available.

+ Details

Name:	imkta_NumberOfVotesForCommonStockHolders
Namespace Prefix:	imkta_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of cash dividend on Class B common stock entitled to receive for each share of Class A common stock.

+ References

No definition available.

+ Details

Name:	imkta_PercentageOfCashDividendOnClassBCommonStockEntitledToReceiveForEachShareOfClassCommonStock
Namespace Prefix:	imkta_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Basis of conversion of convertible common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

+ Details

Name:	us-gaap_CommonStockConversionFeatures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

+ Details

Name:	us-gaap_CommonStockVotingRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: