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Investments in Associated Companies - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 24, 2023 | Sep. 25, 2022 | Sep. 26, 2021
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investments | $ 27,819 | $ 27,378 |
Goodwill | 329,504 | 329,504 | $ 330,204
Editorial service costs | 323,067 | 344,905 | 325,597
TNI Partners |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Distributions from equity method investments | $ 3,600 | 3,800 | 5,200
Equity method investments, ownership percentage | 50.00% |  |
Equity method investments | $ 15,100 | 15,300 |
Goodwill | 12,400 |  |
Other intangible assets | 2,300 |  |
TNI Partners | Editorial Services |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Editorial service costs | 4,400 | 5,200 | 4,500
MNI |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Distributions from equity method investments | $ 2,200 | 1,300 | 2,300
Equity method investments, ownership percentage | 50.00% |  |
Equity method investments | $ 12,800 | 12,000 |
Editorial service fees | $ 5,400 | $ 5,600 | $ 5,600

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