SUPPLEMENTAL CASH FLOW DISCLOSURES ON NON-CASH INVESTING AND FINANCING ACTIVITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flow Noncash [Line Items]
Net Paid In Captital Of Rsus	$ 10,101	$ 8,336	$ 5,027
Perpetual Cumulative Convertible Preferred Stock Issued For Acquisition	0	27,500	0
Dividend Accrued On Perpetual Cumulative Convertible Preferred Stock	452	339	0
Finance Method Lease Obligations Retirement	0	0	0
Net Radio Station Assets Given Up	0	59,000	0
Net Radio Station Assets Acquired	0	59,000	0
Radio Station Assets Acquired Using Preferred Stock	0	27,500	0
Cash acquired through consolidation of a VIE	302	0	0
Barter And Other Transactions [Abstract]
Barter Revenues	4,700	4,002	3,826
Barter expenses	4,789	4,258	3,665
Issuance [Member]
Cash Flow Noncash [Line Items]
Net Paid In Captital Of Rsus	10,381	9,045	5,754
Forfeited [Member]
Cash Flow Noncash [Line Items]
Net Paid In Captital Of Rsus	$ 280	$ 709	$ 727