Revenue - Digital-only Subscription Revenue (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 revenues	$ 598,345	$ 547,680	$ 1,749,937	$ 1,640,785
Subscription
Disaggregation of Revenue [Line Items]
Total revenues	$ 418,577	$ 382,672	$ 1,225,709	$ 1,138,270
Subscription | Revenue from Contract with Customer, Subscription Revenue Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	100.00%	100.00%	100.00%	100.00%
Subscription | Digital
Disaggregation of Revenue [Line Items]
Total revenues	$ 282,228	$ 243,889	$ 810,770	$ 709,378
Subscription | Digital | Revenue from Contract with Customer, Subscription Revenue Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	67.40%	63.70%	66.10%	62.30%
Subscription | Print
Disaggregation of Revenue [Line Items]
Total revenues	$ 136,349	$ 138,783	$ 414,939	$ 428,892
Subscription | Print | Revenue from Contract with Customer, Subscription Revenue Benchmark | Product concentration risk
Disaggregation of Revenue [Line Items]
As % of total	32.60%	36.30%	33.90%	37.70%