GOODWILL AND RADIO BROADCASTING LICENSES - Valuation of Broadcasting Licenses (Details) - Radio Broadcasting Licenses [Member] $ in Millions |
Mar. 31, 2020
USD ($)
|
|---|---|
| Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] | |
| Impairment charge (in millions) | $ 47.7 |
| Discount Rate | 9.50% |
| Year 1 Market Revenue Growth Rate Range | (13.30%) |
| Maximum [Member] | |
| Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] | |
| Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 1.10% |
| Mature Market Share Range | 25.00% |
| Mature Operating Profit Margin Range | 39.70% |
| Minimum [Member] | |
| Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items] | |
| Long-term Market Revenue Growth Rate Range (Years 6 - 10) | 0.70% |
| Mature Market Share Range | 6.90% |
| Mature Operating Profit Margin Range | 27.60% |