Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands		6 Months Ended
	Apr. 04, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Payments to Acquire Intangible Assets		$ 1,041	$ 24,073
Indefinite-lived intangible assets - FCC licenses		385,915		$ 385,915
Finite-Lived Intangible Assets, Gross		824,141		823,500
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year		28,600
Finite-Lived Intangible Assets, Amortization Expense, Year One		55,400
Finite-Lived Intangible Assets, Amortization Expense, Year Two		49,900
Finite-Lived Intangible Assets, Amortization Expense, Year Three		44,600
Finite-Lived Intangible Assets, Amortization Expense, Year Four		42,900
Finite-Lived Intangible Assets, Amortization Expense, Year Five		40,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five		386,000
Goodwill		1,226,222		1,224,679
Series of Individually Immaterial Business Acquisitions
Payments to Acquire Intangible Assets	$ 23,600
Local Media
Goodwill		$ 928,504		926,945
Goodwill, Percentage Of Consolidated Goodwill Total		76.00%
Indefinite-lived intangible assets - FCC licenses
Intangible Asset, Sensitivity Analysis of Fair Value, Impact Of 50 Basis Point Increase In Discount Rate				65,000
Indefinite-lived intangible assets - FCC licenses | Series of Individually Immaterial Business Acquisitions
Indefinite-lived intangible assets - FCC licenses	19,200
Other intangible asset
Finite-Lived Intangible Assets, Gross		$ 103,597		$ 102,956
Other intangible asset | Series of Individually Immaterial Business Acquisitions
Finite-Lived Intangible Assets, Gross	$ 4,100
Other Reporting Units
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount				30.00%
Local Media
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount				25.00%