Acquisitions and Dispositions - 2020 Dispositions - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	Mar. 02, 2020	Jan. 14, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Gain (Loss) on sale of business			$ 96,608	$ 7,025	$ 96,608
Website Business [Member]
Business Acquisition [Line Items]
Selling price of entities net of cash sold		$ 12,900
Cash transferred on sale of entity		2,400
Gain (Loss) on sale of business		$ 2,400
Television Stations KCPQ, KZJO and WITI [Member]
Business Acquisition [Line Items]
Gain (Loss) on sale of business	$ 4,700
Selling price of entities sold	$ 349,900