Acquisitions and Dispositions (Narrative) (Details)					5 Months Ended	7 Months Ended	12 Months Ended
	Jul. 15, 2019 USD ($)	Jun. 26, 2019 USD ($)	May 31, 2019 USD ($)	May 09, 2019 USD ($)	Jun. 03, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Apr. 10, 2018 USD ($)	Apr. 03, 2018 USD ($)	Mar. 31, 2018 station	Mar. 09, 2018 station
Asset Acquisition [Line Items]
Gain on sale of assets or stations					$ (158,000)	$ (103,000)	$ 55,403,000
Merlin Media, LLC LMA
Asset Acquisition [Line Items]
Programmed radio stations | station										2
Number of stations not programed | station											1
Educational Media Foundation | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Asset Acquisition [Line Items]
Gain on sale of assets or stations							47,600,000
Proceeds from sale of assets			$ 103,500,000
Meruelo Media | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Asset Acquisition [Line Items]
Gain (loss) on disposition of assets							10,500,000
Proceeds from sale of assets	$ 43,000,000
Entercom Swap
Asset Acquisition [Line Items]
Gain (loss) on disposition of assets							(2,200,000)
Total assets acquired				$ 22,501,000
Connoisseur Swap
Asset Acquisition [Line Items]
Gain (loss) on disposition of assets							$ 0
Total assets acquired		$ 3,700,000
Merlin Media
Asset Acquisition [Line Items]
Asset purchase agreement									$ 18,000,000
Escrow payment								$ 4,750,000