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Goodwill and Other Intangible Assets -Schedule of Goodwill and Identified Intangible Assets (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Mar. 24, 2024
Sep. 24, 2023
Goodwill [Roll Forward]    
Goodwill, beginning of period $ 329,504 $ 329,504
Allocated to sold operations (1,261) 0
Goodwill, end of period 328,243 329,504
Amortizable intangible assets:    
Total intangibles, net 406,430 424,492
Customer and newspaper subscriber lists    
Amortizable intangible assets:    
Customer and newspaper subscriber lists 305,100 306,766
Less accumulated amortization (238,009) (230,453)
Amortizable intangible assets, net 67,091 76,313
Mastheads    
Non-amortized intangible assets:    
Mastheads $ 11,096 $ 18,675