ACQUISITIONS AND DISPOSITIONS - Narrative (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) fCCLicenseAndAsset	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets									$ 43,135	$ 58,589
Number of FCC licenses and assets to be sold | fCCLicenseAndAsset				2
2022 Beasley Exchange
Business Acquisition [Line Items]
Loss on disposition of business					$ (1,300)
CALIFORNIA
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets			$ 15,700
Gain (loss) on sale of assets			9,900
Assets held for sale				$ 5,800
Transaction fees			$ 300
Houston Texas
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets							$ 4,200
Gain (loss) on sale of assets							$ 10,600
NEVADA
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets						$ 39,100
Gain (loss) on sale of assets						$ 35,300
Land, Buildings And Equipment | Subsequent Event
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets	$ 14,400
Gain (loss) on sale of assets	$ 12,900
Tower Assets
Business Acquisition [Line Items]
Proceeds from sale of property, equipment, intangibles and other assets		$ 10,100		16,900
Gain (loss) on sale of assets		$ 9,100		$ 14,400
Assets not used in Production of Revenue
Business Acquisition [Line Items]
Gain (loss) on sale of assets									$ (6,600)	$ 600
Easement Interest
Business Acquisition [Line Items]
Gain (loss) on sale of assets								$ 2,500