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Investments In Associated Companies - Summarized Financial Results (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 24, 2023
Dec. 25, 2022
Schedule of Equity Method Investments [Line Items]    
Operating revenue $ 155,678 $ 185,131
Operating expenses 149,386 175,621
Restructuring costs 4,265 646
Depreciation and amortization 7,295 7,886
Operating income 7,833 11,178
Net income 1,233 1,824
Equity in earnings 1,541 1,668
TNI Partners    
Schedule of Equity Method Investments [Line Items]    
Operating revenue 6,991 8,814
Operating expenses 4,681 6,285
Operating income 2,310 2,529
MNI    
Schedule of Equity Method Investments [Line Items]    
Operating revenue 10,602 11,904
Operating expenses 7,810 9,346
Restructuring costs 61 26
Depreciation and amortization 120 137
Operating income 2,611 2,395
Net income 772 807
TNI Partners    
Schedule of Equity Method Investments [Line Items]    
Company's 50% share of operating income 1,155 1,265
Equity in earnings $ 1,155 $ 1,265
Percentage of share 50.00% 50.00%
MNI    
Schedule of Equity Method Investments [Line Items]    
Equity in earnings $ 386 $ 404
Percentage of share 50.00%