Goodwill and other intangible assets - Schedule of Indefinite-Lived Intangible Assets, and Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 3,015,944	$ 3,015,944
Accumulated Amortization	(194,028)	(185,175)
Total indefinite-lived and amortizable intangible assets	2,494,947	2,494,947
Network affiliation agreements
Indefinite-lived Intangible Assets [Line Items]
Gross	266,018	266,018
Accumulated Amortization	(127,716)	(122,539)
Other
Indefinite-lived Intangible Assets [Line Items]
Gross	104,198	104,198
Accumulated Amortization	(66,312)	(62,636)
Television and radio station FCC broadcast licenses
Indefinite-lived Intangible Assets [Line Items]
Television and radio station FCC broadcast licenses	$ 2,124,731	$ 2,124,731