Acquisitions and Dispositions (Details) - Entercom Swap $ in Thousands	May 09, 2019 USD ($)
Asset Acquisition [Line Items]
Broadcast licenses	$ 22,963
Property and equipment, net	1,700
Total assets acquired	24,663
Broadcast licenses	(23,565)
Property and equipment, net	(703)
Other intangibles	(395)
Total assets disposed	$ (24,663)

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration