SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimate useful lives	10 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimate useful lives	39 years
Structures | Minimum
Property, Plant and Equipment [Line Items]
Estimate useful lives	3 years
Structures | Maximum
Property, Plant and Equipment [Line Items]
Estimate useful lives	20 years
Towers, transmitters and studio equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimate useful lives	5 years
Towers, transmitters and studio equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimate useful lives	20 years
Furniture and other equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimate useful lives	2 years
Furniture and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimate useful lives	20 years