Acquisitions and Dispositions (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets Acquired:
Current assets	$ 0	$ 1,335
Property and equipment	0	6,678
Other assets:
Broadcast licenses	0	8,086
Goodwill	0	8,151
Other intangibles, deferred costs and investments	0	2,019
Total other assets	0	18,256
Total assets acquired	0	26,269
Liabilities Assumed:
Current liabilities	0	413
Total liabilities assumed	0	413
Net assets acquired	$ 0	$ 25,856