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Significant Accounting Policies - Narrative (Details)
shares in Thousands, $ in Millions
12 Months Ended
Mar. 16, 2020
USD ($)
Sep. 24, 2023
USD ($)
strategicBusinessUnit
state
localMediaOperations
Sep. 25, 2022
USD ($)
shares
Noncontrolling Interest [Line Items]      
Number of local media operations | localMediaOperations   75  
Number of states in which the entity operates | state   26  
Inventory, LIFO reserve   $ 1.1 $ 1.4
Number of strategic business units | strategicBusinessUnit   50  
Warrants outstanding (in shares) | shares     600
Cash collateral for insurance   $ 7.0 $ 4.6
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  
BHMG      
Noncontrolling Interest [Line Items]      
Combined purchase price $ 140.0    
TNI Partners      
Noncontrolling Interest [Line Items]      
Noncontrolling interest, ownership percentage by parent   50.00%  
MNI      
Noncontrolling Interest [Line Items]      
Noncontrolling interest, ownership percentage by parent   50.00%  
BLOX Digital      
Noncontrolling Interest [Line Items]      
Noncontrolling interest, ownership percentage by parent   82.50%