SEGMENT DATA (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) market	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) market	Sep. 30, 2017 USD ($)
Segment data
Number of markets | market	89		89
Intercompany loans | $	$ 155.8	$ 172.7	$ 155.8	$ 172.7
Intercompany interest expense | $	$ 3.9	$ 4.3	$ 11.5	$ 14.2
Operating segments | Broadcast
Segment data
Number of markets | market	89		89