COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands														1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2024 USD ($)	Jan. 17, 2024 USD ($)	Dec. 08, 2023 USD ($)	Jul. 19, 2023 USD ($)	May 26, 2023 USD ($)	Sep. 21, 2022 USD ($) station	Jul. 28, 2021 USD ($)	Oct. 15, 2020 USD ($)	Sep. 02, 2020 USD ($)	Aug. 19, 2020 USD ($)	Jun. 08, 2020 petition	May 22, 2020 USD ($)	Nov. 06, 2018 lawsuit	Dec. 31, 2017 USD ($)	Mar. 31, 2024 USD ($) station	Dec. 31, 2021 USD ($)	Oct. 03, 2018 broadcaster
Loss Contingencies [Line Items]
Number of television stations owned | station															185
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Proposed fine						$ 2,700			$ 9,000					$ 13,000
Proposed fine per station								$ 25	500
Issuance of forfeiture penalty upheld							$ 500
Additional legal expenses accrued																$ 8,000
Number of television stations owned | station						83
Loss contingency, damages sought, total						$ 3,400
Loss contingency accrual															$ 3,400
Unfavorable Regulatory Action | Minimum
Loss Contingencies [Line Items]
Proposed fine per station						20
Unfavorable Regulatory Action | Maximum
Loss Contingencies [Line Items]
Proposed fine per station						26
Management Services Agreement Misconduct
Loss Contingencies [Line Items]
Cash payments for legal settlements															50,000
Loss contingency accrual															$ 445,000
Loss contingency, allegations, payments received				$ 1,500,000
Loss contingency, settlement, value of claims released		$ 1,500,000
Loss contingency, damages awarded		495,000
Management Services Agreement Misconduct | Subsequent Event
Loss Contingencies [Line Items]
Cash payments for legal settlements	$ 495,000
Management Services Agreement Misconduct | Subsequent Event | Sinclair Television Group, Inc.
Loss Contingencies [Line Items]
Cash payments for legal settlements	347,000
Management Services Agreement Misconduct | Subsequent Event | Sinclair Ventures, LLC
Loss Contingencies [Line Items]
Cash payments for legal settlements	148,000
Breach of Merger Agreement
Loss Contingencies [Line Items]
Amount awarded to other party												$ 48,000
Cash payments for legal settlements										$ 48,000
Compliance plan term												4 years
Number of petitions filed | petition											2
Various Cases Alleging Violation of Sherman Antitrust Act
Loss Contingencies [Line Items]
Amount awarded to other party			$ 48,000
Loss contingency, new claims filed, number (lawsuit) | lawsuit													22
Loss contingency, number of other broadcasters | broadcaster																	13
Sinclair Broadcast Group, LLC
Loss Contingencies [Line Items]
Number of television stations owned | station															185
Sinclair Broadcast Group, LLC | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Proposed fine						$ 2,700			9,000					$ 13,000
Proposed fine per station								$ 25	$ 500
Issuance of forfeiture penalty upheld							$ 500
Additional legal expenses accrued																$ 8,000
Number of television stations owned | station						83
Loss contingency, damages sought, total						$ 3,400
Loss contingency accrual															$ 3,400
Sinclair Broadcast Group, LLC | Unfavorable Regulatory Action | Minimum
Loss Contingencies [Line Items]
Proposed fine per station						20
Sinclair Broadcast Group, LLC | Unfavorable Regulatory Action | Maximum
Loss Contingencies [Line Items]
Proposed fine per station						$ 26
Sinclair Broadcast Group, LLC | Management Services Agreement Misconduct
Loss Contingencies [Line Items]
Cash payments for legal settlements															50,000
Loss contingency accrual															$ 445,000
Loss contingency, allegations, payments received				$ 1,500,000
Loss contingency, settlement, value of claims released		1,500,000
Loss contingency, damages awarded		$ 495,000
Sinclair Broadcast Group, LLC | Management Services Agreement Misconduct | Subsequent Event
Loss Contingencies [Line Items]
Cash payments for legal settlements	495,000
Sinclair Broadcast Group, LLC | Management Services Agreement Misconduct | Subsequent Event | Sinclair Television Group, Inc.
Loss Contingencies [Line Items]
Cash payments for legal settlements	347,000
Sinclair Broadcast Group, LLC | Management Services Agreement Misconduct | Subsequent Event | Sinclair Ventures, LLC
Loss Contingencies [Line Items]
Cash payments for legal settlements	$ 148,000
Sinclair Broadcast Group, LLC | Breach of Merger Agreement
Loss Contingencies [Line Items]
Amount awarded to other party												$ 48,000
Cash payments for legal settlements										$ 48,000
Compliance plan term												4 years
Number of petitions filed | petition											2
Sinclair Broadcast Group, LLC | Various Cases Alleging Violation of Sherman Antitrust Act
Loss Contingencies [Line Items]
Amount awarded to other party					$ 48,000
Loss contingency, new claims filed, number (lawsuit) | lawsuit													22
Loss contingency, number of other broadcasters | broadcaster																	13