v3.26.3
Goodwill and intangible assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]    
Gross carrying amount $ 837,740 $ 830,679
Accumulated amortization 697,797 656,970
Net carrying amount 139,943 173,709
Indefinite-lived intangible assets:    
Total intangible assets 306,610 337,845
Goodwill 531,945 518,762
Mastheads    
Indefinite-lived intangible assets:    
Non-amortized intangible assets 166,667 164,136
Advertiser relationships    
Intangible Asset, Finite-Lived [Line Items]    
Gross carrying amount 440,316 434,928
Accumulated amortization 347,287 317,104
Net carrying amount 93,029 117,824
Other customer relationships    
Intangible Asset, Finite-Lived [Line Items]    
Gross carrying amount 87,524 88,609
Accumulated amortization 72,604 67,427
Net carrying amount 14,920 21,182
Subscriber relationships    
Intangible Asset, Finite-Lived [Line Items]    
Gross carrying amount 243,330 240,272
Accumulated amortization 211,336 205,602
Net carrying amount 31,994 34,670
Other intangible assets    
Intangible Asset, Finite-Lived [Line Items]    
Gross carrying amount 66,570 66,870
Accumulated amortization 66,570 66,837
Net carrying amount $ 0 $ 33