PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Annual Impairment Test to Indefinite-lived Intangible Assets (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) market	Dec. 31, 2015 USD ($) market	Dec. 31, 2014 USD ($) market
Property, Plant and Equipment [Abstract]
Period over which the Company forecasts revenue, expenses, and cash flows	10 years
FCC licenses
Regulatory Assets [Line Items]
Impairment charge | $	$ 0.7		$ 15.7
Number of markets | market	1		11
Billboard permits
Regulatory Assets [Line Items]
Impairment charge | $		$ 21.6
Number of markets | market		1