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Goodwill and other intangible assets - Schedule of Indefinite-Lived Intangible Assets and Amortizable Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Indefinite-lived Intangible Assets [Line Items] |  |
Goodwill | $ 3,015,944 | $ 3,015,944
Accumulated Amortization | (211,691) | (185,175)
Total indefinite-lived and amortizable intangible assets | 2,494,322 | 2,494,947
Network affiliation agreements |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Gross | 266,018 | 266,018
Accumulated Amortization | (138,071) | (122,539)
Other |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Gross | 104,198 | 104,198
Accumulated Amortization | (73,620) | (62,636)
Television and radio station FCC broadcast licenses |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Television and radio station FCC broadcast licenses | $ 2,124,106 | $ 2,124,731

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