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RELATED PERSON TRANSACTIONS - Cunningham Broadcasting Corporation (Details) $ in Millions	1 Months Ended		3 Months Ended
	Aug. 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Mar. 31, 2022 USD ($) renewal	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Consolidated total debt			$ 4,398.0
Total revenues			1,288.0	$ 1,511.0
Consolidated VIEs
Related Party Transaction [Line Items]
Consolidated total debt			$ 9.0		$ 9.0
Affiliated Entity \| Cunningham
Related Party Transaction [Line Items]
Agreement renewal period			8 years
Right to acquire capital stock			100.00%
Total payments made under the LMA excluded from liabilities			$ 58.0		58.0
Remaining purchase price			54.0		54.0
Purchase options, broadcast stations			$ 0.2
Proceeds from sale of master control equipment		$ 1.0
Annual revenue from master control services		$ 0.2
Annual revenue for share service	$ 0.5
Share service agreement, annual service consideration increasing rate ( as a percent)	3.00%
Affiliated Entity \| Cunningham \| LMA
Related Party Transaction [Line Items]
Number of additional renewal terms \| renewal			2
Agreement renewal period			5 years
Percentage of net broadcast revenue used to determine annual LMA fees required to be paid			3.00%
Amount used to determine annual LMA fees required to be paid			$ 5.0
Annual increase in aggregate purchase price			6.00%
Lease payments made to entities			$ 3.0	3.0
Affiliated Entity \| Cunningham \| Consolidated VIEs
Related Party Transaction [Line Items]
Consolidated total debt			7.0
Deferred financing costs			0.1
Cunningham License Related Assets \| Cunningham
Related Party Transaction [Line Items]
Total revenues			34.0	$ 36.0
Guarantee Obligations
Related Party Transaction [Line Items]
Unconditional and irrevocably guaranteed debt			38.0		$ 39.0
Guarantee Obligations \| Affiliated Entity \| Cunningham
Related Party Transaction [Line Items]
Unconditional and irrevocably guaranteed debt			$ 36.0