Goodwill and Intangible Assets - Intangible Assets - (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and intangible assets
Broadcast licenses	$ 41,356	$ 41,356
Goodwill	164,887	164,887	$ 164,887
Other intangibles	64,849	78,185
Total intangible assets	$ 271,092	$ 284,428