XML 45 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1

Segment Information (Operations By Lines Of Business) (Details) - USD ($)	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Sep. 29, 2018
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	$ 1,061,836,658	$ 1,013,786,078
Total income from operations	39,463,539	35,888,502
Total assets	1,855,763,317		$ 1,824,910,820
Elimination of intercompany receivable [Member]
Segment Reporting Information By Segment [Line Items]
Total assets	(1,735,000)		(2,378,000)
Grocery [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	375,638,000	363,325,000
Non-foods [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	232,497,000	217,744,000
Perishables [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	275,395,000	265,294,000
Gasoline [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	146,511,000	136,674,000
Retail [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	1,030,041,000	983,037,000
Total income from operations	35,617,000	32,903,000
Total assets	1,677,933,000		1,679,301,000
Other Segment [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	31,796,000	30,749,000
Total income from operations	3,847,000	$ 2,986,000
Total assets	$ 179,565,000		$ 147,988,000

X

- Definition

Segment Reporting Information By Segment [Line Items]

+ References

No definition available.

+ Details

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

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: 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(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesRevenueGoodsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_GroceryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_NonFoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_PerishablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_GasolineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=imkta_OtherSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: