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Investments In Associated Companies - Summarized Financial Results (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 29, 2024
Dec. 24, 2023
Schedule of Equity Method Investments [Line Items]    
Operating revenue $ 144,562 $ 155,678
Operating expenses 149,036 149,386
Restructuring costs 5,150 4,265
Depreciation and amortization 6,265 7,295
Operating income (3,352) 7,833
Net income (16,224) 1,233
Equity in earnings of associated companies 1,122 1,541
TNI Partners    
Schedule of Equity Method Investments [Line Items]    
Operating revenue 6,533 6,991
Operating expenses 5,206 4,681
Operating income 1,327 2,310
MNI    
Schedule of Equity Method Investments [Line Items]    
Operating revenue 9,759 10,602
Operating expenses 7,455 7,810
Restructuring costs 0 61
Depreciation and amortization 90 120
Operating income 2,214 2,611
Net income 994 772
TNI Partners    
Schedule of Equity Method Investments [Line Items]    
Net income 1,250 1,155
Equity in earnings of associated companies 625 578
MNI    
Schedule of Equity Method Investments [Line Items]    
Equity in earnings of associated companies $ 497 $ 386