Segment Data (Details) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Jun. 03, 2018 USD ($)	Jun. 30, 2017 USD ($)	Sep. 30, 2018 segment	Sep. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment						2
Successor Company
Segment Reporting Information [Line Items]
Net revenue	$ 282,254		$ 377,258
Segment adjusted EBITDA	69,556		98,106
Income tax expense (benefit)	(5,078)		(7,684)
Non-operating (income) expense, including net interest expense	(25,564)		(31,716)
Depreciation and amortization	14,142		18,521
Stock-based compensation expense			1,783
(Loss) gain on sale or disposal of assets or stations	(34)		34
Loss on early extinguishment of debt	0		0
Net (loss) income	12,713		17,693
Successor Company | Radio Station Group
Segment Reporting Information [Line Items]
Net revenue	196,357		264,714
Successor Company | Westwood One
Segment Reporting Information [Line Items]
Net revenue	85,227		111,583
Successor Company | Operating Segments | Radio Station Group
Segment Reporting Information [Line Items]
Net revenue	196,357		264,714
Segment adjusted EBITDA	50,399		71,259
Successor Company | Operating Segments | Westwood One
Segment Reporting Information [Line Items]
Net revenue	85,227		111,583
Segment adjusted EBITDA	19,157		26,847
Successor Company | Corporate and Other
Segment Reporting Information [Line Items]
Net revenue	670		961
Successor Company | Adjustments to reconcile to GAAP measure
Segment Reporting Information [Line Items]
Corporate and other expense	(7,452)		(9,887)
Non-operating (income) expense, including net interest expense	(25,564)		(31,716)
Local marketing agreement fees			(1,364)
Depreciation and amortization	(14,142)		(18,521)
Stock-based compensation expense	(1,131)		(1,783)
(Loss) gain on sale or disposal of assets or stations	(34)		(34)
Reorganization items, net			0
Loss on early extinguishment of debt	0		0
Acquisition-related and restructuring costs	(2,738)		(9,679)
Franchise and state taxes	302		255
Predecessor Company
Segment Reporting Information [Line Items]
Net revenue		$ 287,240		$ 453,924	$ 841,801		$ 841,801
Segment adjusted EBITDA		70,757		95,219			193,938
Income tax expense (benefit)		(5,257)		176,859			(6,465)
Non-operating (income) expense, including net interest expense		(36,400)		465,718			(104,763)
Depreciation and amortization		15,208		22,046			47,610
Stock-based compensation expense	1,131	354		231			1,422
(Loss) gain on sale or disposal of assets or stations		83		(158)			2,585
Loss on early extinguishment of debt		(1,063)		0			(1,063)
Net (loss) income		1,274		696,156			(449)
Predecessor Company | Radio Station Group
Segment Reporting Information [Line Items]
Net revenue		202,852		303,317			585,050
Predecessor Company | Westwood One
Segment Reporting Information [Line Items]
Net revenue		83,778		149,715			254,867
Predecessor Company | Operating Segments | Radio Station Group
Segment Reporting Information [Line Items]
Net revenue		202,852		303,317	585,050
Segment adjusted EBITDA		52,770		76,009			148,794
Predecessor Company | Operating Segments | Westwood One
Segment Reporting Information [Line Items]
Net revenue		83,778		149,715	254,867
Segment adjusted EBITDA		17,987		19,210			45,144
Predecessor Company | Corporate and Other
Segment Reporting Information [Line Items]
Net revenue		610		892	$ 1,884
Predecessor Company | Adjustments to reconcile to GAAP measure
Segment Reporting Information [Line Items]
Corporate and other expense		(8,992)		(14,707)			(26,039)
Income tax expense (benefit)		(5,257)		176,859			(6,465)
Non-operating (income) expense, including net interest expense		(35,335)		(483)			(103,700)
Local marketing agreement fees				(1,809)			(8,137)
Depreciation and amortization		(15,208)		(22,046)			(47,610)
Stock-based compensation expense		(354)		(231)			(1,422)
(Loss) gain on sale or disposal of assets or stations		83		(158)			2,585
Reorganization items, net				466,201			0
Loss on early extinguishment of debt		(1,063)		0			(1,063)
Acquisition-related and restructuring costs		(499)		(2,455)			(2,116)
Franchise and state taxes		(141)		(234)			(420)
Local marketing agreement fees | Adjustments to reconcile to GAAP measure
Segment Reporting Information [Line Items]
Local marketing agreement fees		(2,717)
Local marketing agreement fees | Successor Company
Segment Reporting Information [Line Items]
Local marketing agreement fees	1,006		$ 1,364
Local marketing agreement fees | Successor Company | Adjustments to reconcile to GAAP measure
Segment Reporting Information [Line Items]
Local marketing agreement fees	$ (1,006)
Local marketing agreement fees | Predecessor Company
Segment Reporting Information [Line Items]
Local marketing agreement fees		$ 2,717		$ 1,809			$ 8,137