PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 158,793	$ 158,480
Less: Accumulated depreciation and amortization	(133,942)	(129,202)
Property and equipment, net	24,851	29,278
Land and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,830	3,777
Property, Plant and Equipment, Estimated Useful Lives	0 years
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,264	1,554
Property, Plant and Equipment, Estimated Useful Lives	31 years
Transmitters and towers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 39,266	41,317
Transmitters and towers [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	7 years
Transmitters and towers [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	15 years
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 57,218	55,767
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	7 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 10,153	9,369
Property, Plant and Equipment, Estimated Useful Lives	6 years
Software and web development [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 23,679	22,411
Property, Plant and Equipment, Estimated Useful Lives	3 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 24,248	24,133
Property, Plant and Equipment, Estimated Useful Lives	Lease Term
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 135	$ 152
Property, Plant and Equipment, Estimated Useful Lives	0 years