Supplementary Balance Sheet Information (Schedule Of Other Long-Term Liabilities) (Details) (USD $)	Sep. 27, 2014	Sep. 28, 2013
Supplementary Balance Sheet Information [Line Items]
Advance payments on purchases contracts	$ 1,748,818	$ 2,054,112
Deferred gain - sale/leasebacks	369,773imkta_DeferredGainOnSaleLeaseback	420,166imkta_DeferredGainOnSaleLeaseback
Deferred lease expense	1,875,776imkta_DeferredLeaseExpense	1,900,084imkta_DeferredLeaseExpense
Nonqualified investment plan liability	8,172,335	7,211,523
Other	1,261,623	1,047,281
Total other long-term liabilities	30,355,536us-gaap_OtherLiabilities	29,160,880us-gaap_OtherLiabilities
Less current portion	1,565,501us-gaap_OtherLiabilitiesCurrent	1,342,663us-gaap_OtherLiabilitiesCurrent
Other long-term liabilities, net of current portion	28,790,035us-gaap_OtherLiabilitiesNoncurrent	27,818,217us-gaap_OtherLiabilitiesNoncurrent
Workers Compensation Insurance [Member]
Supplementary Balance Sheet Information [Line Items]
Self-insurance liabilities	13,283,535	13,066,779
General Liability [Member]
Supplementary Balance Sheet Information [Line Items]
Self-insurance liabilities	$ 3,643,676	$ 3,460,935

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- Definition

Deferred gain on sale leaseback.

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- Definition

Deferred lease expense.

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- Definition

Nonqualified investment plan liability.

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Carrying value as of the balance sheet date of obligations incurred through that date and due beyond one year (or beyond one operating cycle if longer) to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverages to employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

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Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are expected to be paid after one year (or the normal operating cycle, if longer), from the balance sheet date.

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