Acquisitions and Dispositions - Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Oct. 29, 2018
Assets Acquired:
Current assets		$ 559
Property and equipment	$ 25	3,007
Other assets:
Broadcast licenses	61	1,991
Goodwill	124	3,281
Other intangibles, deferred costs and investments		1,123
Total other assets	185	6,395
Total assets acquired	210	9,961	$ 9,300
Liabilities Assumed:
Current liabilities		120
Total liabilities assumed		120
Net assets acquired	$ 210	$ 9,841