Other matters - Narrative (Details)				1 Months Ended			3 Months Ended	12 Months Ended
		May 26, 2023 USD ($) preliminaryApproval	Oct. 03, 2018 defendant	Jun. 30, 2022 USD ($)	Jun. 30, 2019 defendant	Dec. 13, 2018 defendant	Sep. 30, 2022	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Cost of revenues	[1]							$ 1,718,857,000	$ 1,693,221,000	$ 1,598,759,000
Related Party
Commitments and Contingencies Disclosure [Line Items]
Proceeds from maturity of debt securities available for sale				$ 3,000,000
Related Party | MadHive Inc
Commitments and Contingencies Disclosure [Line Items]
Related party Transaction, agreement term extension period							2 years
Related Party | Intangible Contract Asset
Commitments and Contingencies Disclosure [Line Items]
Gross											$ 20,800,000
Intangible asset useful life											2 years
Equity And Debt Investment | Related Party
Commitments and Contingencies Disclosure [Line Items]
Cost of revenues								90,600,000	121,100,000	80,300,000
Accounts payable								$ 5,400,000	$ 10,000,000
Two Customers | Sales Revenue | Customer Concentration Risk
Commitments and Contingencies Disclosure [Line Items]
Percentage of revenue								10.00%	10.00%
Customer One | Sales Revenue | Customer Concentration Risk
Commitments and Contingencies Disclosure [Line Items]
Revenues								$ 415,400,000	$ 416,300,000	410,800,000
Customer Two | Sales Revenue | Customer Concentration Risk
Commitments and Contingencies Disclosure [Line Items]
Revenues								300,500,000	387,300,000	$ 399,700,000
One Customer | Sales Revenue | Customer Concentration Risk
Commitments and Contingencies Disclosure [Line Items]
Percentage of revenue										10.00%
Programming Contracts
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments under contract								$ 3,430,000,000	$ 2,830,000,000
Clay, Massey & Associates, P.C. v. Gray Television
Commitments and Contingencies Disclosure [Line Items]
Number of defendants | defendant			16		4
Loss contingency, number of codefendants | preliminaryApproval		4
Litigation settlement, amount awarded to other party		$ 0
Loss contingency, damages sought, value		$ 48,000,000
Settled Litigation
Commitments and Contingencies Disclosure [Line Items]
Number of defendants | defendant					4	7

[1] Cost of revenues exclude charges for depreciation and amortization expense, which are shown separately above.