Nature of Business, Interim Financial Data and Basis of Presentation (Schedule of Assets Held for Sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 123,453
WABC Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	13,166
Meruelo Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	30,287
DC Land
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	80,000	$ 80,000
Property and equipment, net
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	87,570
Property and equipment, net | WABC Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	7,054
Property and equipment, net | Meruelo Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	516
Property and equipment, net | DC Land
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	80,000	80,000
Broadcast licenses
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	34,943
Broadcast licenses | WABC Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	5,738
Broadcast licenses | Meruelo Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	29,205
Broadcast licenses | DC Land
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	0	0
Other intangible assets
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	940
Other intangible assets | WABC Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	374
Other intangible assets | Meruelo Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	566
Other intangible assets | DC Land
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 0	$ 0