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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% |

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