Goodwill and other intangible assets - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of operating segments | segment	1
Number of reportable segments | segment	1
Goodwill	$ 2,981,587	$ 2,981,587
Adjustments	0	$ 0
Acquired Indefinite-Lived Intangible Assets [Line Items]
Decrease In accumulated amortization	111,600
Decrease in gross intangible assets	111,600
Television and radio station FCC broadcast licenses
Acquired Indefinite-Lived Intangible Assets [Line Items]
Indefinite lived intangible assets	800
Indefinite lived intangible assets	$ 800