SEGMENT DATA (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) market	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) market	Jun. 30, 2017 USD ($)
Segment data
Number of markets | market	89		89
Intercompany loans | $	$ 160.1	$ 172.7	$ 160.1	$ 172.7
Intercompany interest expense | $	$ 3.8	$ 4.2	$ 7.6	$ 9.9
Operating segments | Broadcast
Segment data
Number of markets | market	89		89