Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 25, 2023	Jun. 26, 2022	Jun. 25, 2023	Jun. 26, 2022
Operating revenue:
Total operating revenue	$ 171,310	$ 195,037	$ 527,129	$ 587,333
Advertising and marketing services revenue
Operating revenue:
Total operating revenue	79,120	91,001	246,406	277,388
Advertising and marketing services revenue | Print advertising revenue
Operating revenue:
Total operating revenue	29,216	44,814	102,503	145,032
Advertising and marketing services revenue | Digital advertising revenue
Operating revenue:
Total operating revenue	49,904	46,187	143,903	132,356
Subscription revenue
Operating revenue:
Total operating revenue	77,557	89,048	235,838	263,915
Subscription revenue | Print advertising revenue
Operating revenue:
Total operating revenue	61,842	78,079	193,799	234,962
Subscription revenue | Digital advertising revenue
Operating revenue:
Total operating revenue	15,715	10,969	42,039	28,953
Other revenue
Operating revenue:
Total operating revenue	14,633	14,988	44,885	46,030
Other revenue | Print advertising revenue
Operating revenue:
Total operating revenue	9,773	10,671	30,542	32,430
Other revenue | Digital advertising revenue
Operating revenue:
Total operating revenue	$ 4,860	$ 4,317	$ 14,343	$ 13,600