INCOME TAXES - Expected And Reported Income Taxes (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Computed tax expense at federal statutory rates on income before income taxes	$ (80,432)	$ (77,016)	$ (8,425)
State income tax expense, net of federal benefit	13,661	(4,779)	23,045
Goodwill impairment	98,910	64,465	0
Valuation allowance current year activity	(321)	(2,593)	2,395
Tax impact of share-based awards	950	872	1,383
Transaction costs	105	391	8,477
Recognized gain on Exchange Transactions	0	0	6,435
U.S. federal income tax reform	0	883	(291,497)
Tax benefit shortfall associated with share-based awards	0	0	0
Taxable gain on sale of radio stations	0	5,511	0
Nondeductible expenses and other	4,333	8,113	1,102
Total income taxes (benefit)	$ 37,206	$ (4,153)	$ (257,085)