Goodwill and Other Intangible Assets - Goodwill (Details) $ in Thousands	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 854,694
Accumulated impairment losses, beginning balance	(237,914)
Goodwill net, beginning balance	616,780
Goodwill, gross, ending balance	854,694
Accumulated impairment losses, ending balance	(237,914)
Goodwill net, ending balance	616,780
Television
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	681,535
Accumulated impairment losses, beginning balance	(215,414)
Goodwill net, beginning balance	466,121
Goodwill, gross, ending balance	681,535
Accumulated impairment losses, ending balance	(215,414)
Goodwill net, ending balance	466,121
Radio
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	41,000
Accumulated impairment losses, beginning balance	0
Goodwill net, beginning balance	41,000
Goodwill, gross, ending balance	41,000
Accumulated impairment losses, ending balance	0
Goodwill net, ending balance	41,000
Digital
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	132,159
Accumulated impairment losses, beginning balance	(22,500)
Goodwill net, beginning balance	109,659
Goodwill, gross, ending balance	132,159
Accumulated impairment losses, ending balance	(22,500)
Goodwill net, ending balance	$ 109,659