GOODWILL AND RADIO BROADCASTING LICENSES - Estimation of Fairvalue (Details) - Valuation, Income Approach	Jun. 30, 2024
Discount Rate
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.100
Revenue Growth Rate Range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	(0.032)
Revenue Growth Rate Range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.002
Terminal Growth Rate
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	(0.005)
Mature Market Share Range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.010
Mature Market Share Range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.285
Operating Profit Margin Range | Minimum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.025
Operating Profit Margin Range | Maximum
Indefinite-Lived Intangible Assets [Line Items]
Measurement input	0.300