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Investments in Associated Companies Summarized Financial Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 25, 2017
Jun. 26, 2016
Jun. 25, 2017
Jun. 26, 2016
Schedule of Equity Method Investments [Line Items]        
Equity in earnings of associated companies $ 1,616,000 $ 1,825,000 $ 6,034,000 $ 6,633,000
Equity Method Investee- TNI [Member]        
Schedule of Equity Method Investments [Line Items]        
Proceeds from Equity Method Investment, Dividends or Distributions 1,213,000 1,501,000 3,633,000 5,230,000
Share of TNI Operating Expenses 128,000 162,000 428,000 (1,000)
Equity Method Investment, Summarized Financial Information, Revenue 11,330,000 12,231,000 37,151,000 41,053,000
Equity Method Investment, Summarized Financial Information, Operating Expenses Excluding Depreciation, Amortization And Workforce Adjustments 9,178,000 10,073,000 28,948,000 32,515,000
Equity Method Investment, Summarized Financial Information, Operating Income 2,152,000 2,158,000 8,203,000 8,538,000
Income (Loss) From Equity Method Investments Before Amortization 1,076,000 1,080,000 4,102,000 4,269,000
Amortization Of Intangible Assets- TNI 105,000 105,000 314,000 314,000
Equity in earnings of associated companies 971,000 975,000 3,788,000 3,955,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 418,000   418,000  
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two 418,000   418,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 314,000   314,000  
Equity Method Investee- MNI [Member]        
Schedule of Equity Method Investments [Line Items]        
Proceeds from Equity Method Investment, Dividends or Distributions 500,000 1,750,000 2,750,000 5,750,000
Equity Method Investment, Summarized Financial Information, Revenue 15,070,000 16,263,000 46,493,000 49,602,000
Equity Method Investment, Summarized Financial Information, Operating Expenses Excluding Depreciation, Amortization And Workforce Adjustments 12,649,000 13,160,000 38,576,000 39,819,000
Equity Method Investment, Summarized Financial Information, Workforce Adjustments 81,000 13,000 236,000 32,000
Equity Method Investment, Summarized Financial Information, Depreciation And Amortization 348,000 410,000 1,044,000 1,303,000
Equity Method Investment, Summarized Financial Information, Operating Income 1,992,000 2,680,000 6,637,000 8,448,000
Equity Method Investment, Summarized Financial Information, Net Income (Loss) 1,291,000 1,699,000 4,492,000 5,347,000
Equity in earnings of associated companies $ 645,000 $ 850,000 $ 2,246,000 $ 2,678,000