Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Carrying amount:
Total carrying amount	$ 1,417,678	$ 1,417,341
Accumulated amortization:
Total accumulated amortization	(446,372)	(375,902)
Net amortizable intangible assets	971,306	1,041,439
Indefinite-lived intangible assets — FCC licenses	779,815	779,815
Total other intangible assets	1,751,121	1,821,254
Television affiliation relationships
Carrying amount:
Total carrying amount	1,060,244	1,060,244
Accumulated amortization:
Total accumulated amortization	(262,645)	(222,092)
Customer lists and advertiser relationships
Carrying amount:
Total carrying amount	220,997	220,997
Accumulated amortization:
Total accumulated amortization	(125,640)	(106,654)
Other
Carrying amount:
Total carrying amount	136,437	136,100
Accumulated amortization:
Total accumulated amortization	$ (58,087)	$ (47,156)