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Investments in Associated Companies Summarized Financial Information (Details) - USD ($)
 3 Months Ended
Dec. 24, 2017
Dec. 25, 2016
Schedule of Equity Method Investments [Line Items]    
Equity in earnings of associated companies $ 2,383,000 $ 2,689,000
Equity Method Investee- TNI [Member]    
Schedule of Equity Method Investments [Line Items]    
Proceeds from Equity Method Investment, Distribution 1,567,000 983,000
Share of TNI Operating Expenses 134,000 142,000
Equity Method Investment, Summarized Financial Information, Revenue 13,230,000 13,314,000
Equity Method Investment, Summarized Financial Information, Operating Expenses Excluding Depreciation, Amortization And Workforce Adjustments 9,982,000 9,999,000
Equity Method Investment, Summarized Financial Information, Operating Income   3,315,000
Equity Method Investment, Summarized Financial Information, Net Income (Loss) 3,248,000  
Income (Loss) From Equity Method Investments Before Amortization 1,624,000 1,658,000
Amortization Of Intangible Assets- TNI 105,000 105,000
Equity in earnings of associated companies 1,519,000 1,553,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 418,000  
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two 418,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 105,000  
Equity Method Investee- MNI [Member]    
Schedule of Equity Method Investments [Line Items]    
Proceeds from Equity Method Investment, Distribution 750,000 1,250,000
Equity Method Investment, Summarized Financial Information, Revenue 16,065,000 17,042,000
Equity Method Investment, Summarized Financial Information, Operating Expenses Excluding Depreciation, Amortization And Workforce Adjustments 12,932,000 13,379,000
Equity Method Investment, Summarized Financial Information, Workforce Adjustments 64,000 26,000
Equity Method Investment, Summarized Financial Information, Depreciation And Amortization 279,000 349,000
Equity Method Investment, Summarized Financial Information, Operating Income 2,790,000 3,288,000
Equity Method Investment, Summarized Financial Information, Net Income (Loss) 1,728,000 2,272,000
Equity in earnings of associated companies $ 864,000 $ 1,136,000