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Goodwill and intangible assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 853,715 $ 868,307
Accumulated amortization 568,213 510,833
Net carrying amount 285,502 357,474
Indefinite-lived intangible assets:    
Total intangible assets 453,052 524,350
Goodwill 531,112 533,876
Mastheads    
Indefinite-lived intangible assets:    
Non-amortized intangible assets 167,550 166,876
Advertiser relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 446,801 446,609
Accumulated amortization 269,058 236,168
Net carrying amount 177,743 210,441
Other customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 89,204 101,819
Accumulated amortization 57,016 56,601
Net carrying amount 32,188 45,218
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 250,840 251,099
Accumulated amortization 176,736 155,528
Net carrying amount 74,104 95,571
Other intangible assets    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 66,870 68,780
Accumulated amortization 65,403 62,536
Net carrying amount $ 1,467 $ 6,244