Property and Equipment (Assets Held for Sale) (Details) - USD ($) $ in Thousands		3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 27, 2019	Sep. 30, 2019	Jun. 03, 2018	Dec. 31, 2018	Dec. 31, 2019	Sep. 18, 2019
Long Lived Assets Held-for-sale [Line Items]
Impairment of assets held for sale			$ 0	$ 0	$ 6,165
Assets held-for-sale					87,000
FCC license
Long Lived Assets Held-for-sale [Line Items]
Impairment of assets held for sale	$ 1,200
Assets held-for-sale					4,573
Other intangibles, net
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					373
Property and equipment
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					82,054
WABC Sale
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					12,000
WABC Sale | FCC license
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					4,573
WABC Sale | Other intangibles, net
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					373
WABC Sale | Property and equipment
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale					7,054
DC Land
Long Lived Assets Held-for-sale [Line Items]
Impairment of assets held for sale		$ 5,000
Assets held-for-sale				80,000	75,000	$ 75,000
DC Land | FCC license
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale				0	0
DC Land | Other intangibles, net
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale				0	0
DC Land | Property and equipment
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale				$ 80,000	$ 75,000