Investments in Associated Companies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 25, 2022	Sep. 26, 2021	Sep. 27, 2020	Mar. 16, 2020
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 27,378	$ 26,682
Goodwill	329,504	330,204	$ 328,445	$ 79,896
Editorial service costs	344,905	325,597	259,382
TNI Partners
Schedule of Equity Method Investments [Line Items]
Distributions from equity method investments	$ 3,831	5,150	3,176
Equity method investments, ownership percentage	50.00%
Equity method investments	$ 15,345	14,702
Goodwill	12,366
Other intangible assets	2,336
TNI Partners \| Editorial Services
Schedule of Equity Method Investments [Line Items]
Editorial service costs	5,164	4,520	4,904
MNI
Schedule of Equity Method Investments [Line Items]
Distributions from equity method investments	$ 1,250	$ 2,300	1,300
Equity method investments, ownership percentage	50.00%	50.00%
Equity method investments	$ 12,033	$ 11,980
Editorial service fees	$ 5,607	$ 5,562	$ 6,152

Amount of fees charged for providing the editorial content of the product.

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