Goodwill and other intangible assets - Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 2,981,587	$ 2,981,587
Accumulated Amortization	0	0
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	(333,157)	(298,593)
Total indefinite-lived and amortizable intangible assets	2,729,693	2,740,081
Television and radio station FCC broadcast licenses
Indefinite-lived Intangible Assets [Line Items]
Television and radio station FCC broadcast licenses	2,123,898	2,123,898
Retransmission agreements
Finite-Lived Intangible Assets [Line Items]
Gross	224,827	235,215
Accumulated Amortization	(178,149)	(168,439)
Network affiliation agreements
Finite-Lived Intangible Assets [Line Items]
Gross	309,503	309,503
Accumulated Amortization	(115,547)	(97,195)
Other
Finite-Lived Intangible Assets [Line Items]
Gross	71,465	71,465
Accumulated Amortization	$ (39,461)	$ (32,959)