XML 78 R66.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions | Sep. 24, 2016 | Sep. 26, 2015 | Sep. 27, 2014 | Sep. 28, 2013
--- | --- | --- | --- | ---
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Short-term non-interest bearing loans outstanding to investment/profit sharing plan | $ 0.0 | $ 0.0 |  |
Common Stock [Member] |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares authorized for repurchase |  |  |  | 4,000,000
Common Stock [Member] | Class B Common Stock [Member] | Robert P. Ingle, Former CEO and Director [Member] |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares authorized for repurchase |  |  | 2,500,000 |
Purchase price of shares |  |  | $ 65.0 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(e)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_LoansAndLeasesReceivableRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
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: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=imkta_FormerCeoAndDirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |