Segment Data (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Net revenue	$ 263,679	$ 264,030
Income tax expense (benefit)	118	6,026
Non-operating (income) expense, including net interest expense	30,263	33,943
Local marketing agreement fees	(1,107)	(2,707)
Depreciation and amortization	(11,981)	(16,282)
Stock-based compensation expense	(166)	(538)
(Loss) gain on sale or disposal of assets or stations	11	(2,606)
Net (loss) income	(5,001)	(7,395)
Operating Segments
Segment Reporting Information [Line Items]
Net revenue		264,030
Segment adjusted EBITDA	48,842	48,007
Operating Segments | Radio Station Group
Segment Reporting Information [Line Items]
Net revenue	168,225	173,603
Segment adjusted EBITDA	36,186	39,038
Operating Segments | Westwood One
Segment Reporting Information [Line Items]
Net revenue	94,790	89,855
Segment adjusted EBITDA	12,656	8,969
Corporate and Other | Corporate and Other
Segment Reporting Information [Line Items]
Net revenue	664	572
Corporate and other expense	(8,573)	(9,274)
Adjustments to reconcile to GAAP measure
Segment Reporting Information [Line Items]
Income tax expense (benefit)	118	6,026
Non-operating (income) expense, including net interest expense	(96)	(33,943)
Local marketing agreement fees	(1,107)	(2,707)
Depreciation and amortization	(11,981)	(16,282)
Stock-based compensation expense	(166)	(538)
(Loss) gain on sale or disposal of assets or stations	(11)	2,606
Reorganization items, net	30,167	0
Acquisition-related and restructuring costs	(1,721)	(1,150)
Franchise and state taxes	$ (139)	$ (140)