Goodwill and Other Intangible Assets - Summary of other intangible assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Carrying amount:
Total carrying amount	$ 1,417,693	$ 1,417,341
Accumulated amortization:
Total accumulated amortization	(469,930)	(375,902)
Net amortizable intangible assets	947,763	1,041,439
Total other intangible assets	1,727,178	1,821,254
FCC licenses
Accumulated amortization:
Indefinite-lived intangible assets — FCC licenses	779,415	779,815
Other affiliation relationships
Carrying amount:
Total carrying amount	1,060,244	1,060,244
Accumulated amortization:
Total accumulated amortization	(276,163)	(222,092)
Customer lists and advertiser relationships
Carrying amount:
Total carrying amount	220,997	220,997
Accumulated amortization:
Total accumulated amortization	(132,161)	(106,654)
Other
Carrying amount:
Total carrying amount	136,452	136,100
Accumulated amortization:
Total accumulated amortization	$ (61,606)	$ (47,156)