Basis of presentation, merger agreement and accounting policies - Narrative (Details)				3 Months Ended		6 Months Ended
	Jun. 02, 2023 USD ($) shares	Jun. 01, 2023 shares	May 22, 2023 USD ($)	Jun. 30, 2023 USD ($) market shares	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment station radioStation market shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) shares
Disaggregation of Revenue [Line Items]
Number of operating segments | segment						1
Number of reportable segments | segment						1
Number of television stations | station						64
Number of radio stations | radioStation						2
Number of markets in which entity operates | market				51		51
Allowance for doubtful accounts receivable				$ 4,249,000		$ 4,249,000		$ 3,697,000
Asset impairment and other				$ 3,359,000	$ (105,000)	$ 3,359,000	$ (163,000)
Shares repurchased in period (in shares) | shares				122,978,320		122,978,320		100,970,426
Shares repurchased in period				$ 5,314,047,000		$ 5,314,047,000		$ 5,053,160,000
Accelerated Share Repurchase Program (ASR)
Disaggregation of Revenue [Line Items]
Share repurchase program	$ 300,000,000
Shares repurchased in period (in shares) | shares	15,200,000
Percent repurchased	80.00%
Shares repurchased in period	$ 240,000,000
Teton Parent Corp
Disaggregation of Revenue [Line Items]
Termination fee			$ 136,000,000
Termination fee paid in shares (in shares) | shares		8,600,000
Teton Parent Corp | Advisor
Disaggregation of Revenue [Line Items]
Termination fee			$ 9,900,000