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Goodwill and intangible assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 829,865 $ 852,152
Accumulated amortization 597,463 588,481
Net carrying amount 232,402 263,671
Indefinite-lived intangible assets:    
Total intangible assets 395,954 430,374
Goodwill 518,099 530,028
Mastheads    
Indefinite-lived intangible assets:    
Non-amortized intangible assets 163,552 166,703
Advertiser relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 434,195 445,356
Accumulated amortization 284,376 279,176
Net carrying amount 149,819 166,180
Other customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 88,541 89,106
Accumulated amortization 61,130 59,198
Net carrying amount 27,411 29,908
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 240,259 250,820
Accumulated amortization 185,228 183,895
Net carrying amount 55,031 66,925
Other intangible assets    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 66,870 66,870
Accumulated amortization 66,729 66,212
Net carrying amount $ 141 $ 658