Revenue - Advertising Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 25, 2022	Sep. 30, 2023	Sep. 25, 2022
Disaggregation of Revenue [Line Items]
Total advertising	$ 598,345	$ 547,680	$ 1,749,937	$ 1,640,785
Revenue from Contract with Customer, Advertising Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	100.00%	100.00%	100.00%	100.00%
Advertising
Disaggregation of Revenue [Line Items]
Total advertising	$ 117,113	$ 110,467	$ 341,124	$ 344,116
Digital | Revenue from Contract with Customer, Advertising Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	64.00%	63.60%	61.60%	60.00%
Digital | Advertising
Disaggregation of Revenue [Line Items]
Total advertising	$ 75,001	$ 70,282	$ 210,076	$ 206,588
Print | Revenue from Contract with Customer, Advertising Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	36.00%	36.40%	38.40%	40.00%
Print | Advertising
Disaggregation of Revenue [Line Items]
Total advertising	$ 42,112	$ 40,185	$ 131,048	$ 137,528