v3.19.3

INTANGIBLE ASSETS AND GOODWILL - Changes in goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill before cumulative loss on impairment	$ 982,663		$ 982,663	$ 988,056
Accumulated loss on impairment	443,194		443,194	$ 126,056
Beginning balance after cumulative loss on impairment		$ 539,469	862,000
Loss on impairment during the year	(317,100)	0	(317,138)
Measurement period adjustments to acquired goodwill		0	(21,498)
Ending balance	$ 539,469	549,881	539,469
Cumulus Exchange [Member]
Goodwill [Line Items]
Disposition of radio stations		(4,862)	(8,623)
Cumulus Exchange [Member]
Goodwill [Line Items]
Acquisition of rasdio stations		$ 15,274	$ 24,728

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