ASSETS HELD FOR SALE AND DISCONTINUED OPERATIONS - Major Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	$ 10,188	$ 19,603
Land and Land Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	0	2,645
Building
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	0	1,053
Leasehold Improvements [Member]
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	0	0
Equipment
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	48	15,905
Net property and equipment
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	48	19,603
Radio broadcasting licenses
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	10,140	0
Other intangibles
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	0	0
Goodwill
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	0	0
Total intangibles
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	$ 10,140	$ 0