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Significant Accounting Policies - Narrative (Details)
$ in Millions
12 Months Ended
Sep. 28, 2025
USD ($)
strategicBusinessUnit
segment
local_media_operation
state
Sep. 29, 2024
USD ($)
Sep. 24, 2023
USD ($)
Noncontrolling Interest [Line Items]      
Number of media operations | local_media_operation 72    
Number of states in which the entity operates | state 25    
Inventory, LIFO reserve $ 0.5 $ 0.8  
Depreciation expense $ 7.7 10.4 $ 11.6
Number of strategic business units | strategicBusinessUnit 50    
Number of operating segments | segment 1    
Number of reportable segments | segment 1    
Cash collateral for insurance $ 6.7 $ 6.7  
Minimum      
Noncontrolling Interest [Line Items]      
Vesting or restriction period (in years) 1 year    
Maximum      
Noncontrolling Interest [Line Items]      
Vesting or restriction period (in years) 4 years    
BLOX Digital      
Noncontrolling Interest [Line Items]      
Noncontrolling interest, ownership percentage by parent 82.50%    
TNI Partners      
Noncontrolling Interest [Line Items]      
ownership interest percentage 50.00% 50.00% 50.00%
MNI      
Noncontrolling Interest [Line Items]      
ownership interest percentage 50.00%