Goodwill and Other Intangible Assets - Goodwill (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 1,462,593
Accumulated impairment losses, beginning balance	(237,914)
Goodwill net, beginning balance	1,224,679
Goodwill, Gross	1,462,593
Goodwill, Impaired, Accumulated Impairment Loss	237,914
Goodwill	1,224,679
Local Media
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,143,859
Accumulated impairment losses, beginning balance	(216,914)
Goodwill net, beginning balance	926,945
Goodwill, Gross	1,143,859
Goodwill, Impaired, Accumulated Impairment Loss	216,914
Goodwill	926,945
National Media
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	318,734
Accumulated impairment losses, beginning balance	(21,000)
Goodwill net, beginning balance	297,734
Goodwill, Gross	318,734
Goodwill, Impaired, Accumulated Impairment Loss	21,000
Goodwill	$ 297,734