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Property Held For Lease And Rental Income (Schedule Of Owned Properties Under Operating Leases By Major Classes) (Details) - USD ($)
Sep. 30, 2017
Sep. 24, 2016
Property Subject to or Available for Operating Lease [Line Items]    
Property subject to operating lease, Gross $ 215,806,444 $ 199,397,506
Less accumulated depreciation (114,072,360) (101,573,490)
Property subject to operating lease, Total 101,734,084 97,824,016
Land [Member]    
Property Subject to or Available for Operating Lease [Line Items]    
Property subject to operating lease, Gross 45,528,897 44,899,234
Buildings [Member]    
Property Subject to or Available for Operating Lease [Line Items]    
Property subject to operating lease, Gross $ 170,277,547 $ 154,498,272