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Goodwill and Other Intangible Assets - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 25, 2022 USD ($) | Dec. 26, 2021 USD ($) | Sep. 25, 2022 USD ($) | Sep. 26, 2021 USD ($) | Sep. 27, 2020 USD ($) | Mar. 29, 2020 USD ($) | Mar. 16, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Gain (Loss) on Disposition of Property Plant Equipment |  |  |  |
Goodwill attributable to the disposition of non-core operation |  |  | $ 700 | $ 0 |  |  |
Decrease in royalty rates | 5000.00% |  | 5000.00% |  |  |  |
Non-amortized intangible assets |  |  | $ 14,203 | 787 | $ 972 |  |
Increase in discount rate | 10000.00% |  | 10000.00% |  |  |  |
Amortization expense |  |  | $ 22,180 | 24,859 | 20,748 |  |
Annual amortization of intangible assets, year one | $ 19,370 |  | 19,370 |  |  |  |
Annual amortization of intangible assets, year two | 16,623 |  | 16,623 |  |  |  |
Annual amortization of intangible assets, year three | 10,917 |  | 10,917 |  |  |  |
Annual amortization of intangible assets, year four | 7,040 |  | 7,040 |  |  |  |
Annual amortization of intangible assets, year five | 5,072 |  | $ 5,072 |  |  |  |
Weighted average amortization period (in years) |  |  | 12 years 6 months |  |  |  |
Goodwill | 329,504 |  | $ 329,504 | $ 330,204 | $ 328,445 |  | $ 79,896
Amount of Goodwill expected to be tax deductible | $ 42,442 |  | 42,442 |  |  |  |
Estimating Using Royalty Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Non-amortized intangible assets |  |  | 6,992 |  |  |  |
Estimating Using Discount Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Non-amortized intangible assets |  |  | $ 257 |  |  |  |
Minimum | Measurement Input, Royalty Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, measurement input | 0.000 |  | 0.000 |  |  |  |
Minimum | Measurement Input, Discount Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, measurement input | 0.0950 |  | 0.0950 |  |  |  |
Maximum | Measurement Input, Royalty Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, measurement input | 0.015 |  | 0.015 |  |  |  |
Maximum | Measurement Input, Discount Rate |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, measurement input | 0.1100 |  | 0.1100 | 0.1050 |  |  |
Customer and Newspaper Subscriber Lists |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Write off of gross cost and accumulated amortization | $ 251,100 | $ 199,900 |  |  |  |  |
Non-Compete and Consulting Agreements |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Write off of gross cost and accumulated amortization |  | $ 28,700 |  |  |  |  |
BHMG |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | $ 79,896 |  | $ 63,559 |
BHMG | Mastheads |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Indefinite-lived masthead assets | 20,390 |  | $ 20,390 | 20,390 |  | 21,680 |
BHMG | Advertiser relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Finite-lived intangibles | 27,620 |  | 27,620 | 27,620 |  | 38,780 |
BHMG | Subscriber relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Finite-lived intangibles | 27,850 |  | 27,850 | 27,850 |  | 36,060 |
BHMG | Commercial print relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Finite-lived intangibles | $ 19,560 |  | $ 19,560 | $ 19,560 |  | $ 17,130 |

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