INTANGIBLE ASSETS AND GOODWILL - Assumption of impairment (Details) - Broadcasting Licenses |
3 Months Ended | ||||
|---|---|---|---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Estimates and assumptions used for impairment test [Line Items] | |||||
| Discount rate | 8.00% | 8.50% | 9.00% | 9.00% | 9.25% |
| Minimum | |||||
| Estimates and assumptions used for impairment test [Line Items] | |||||
| Operating profit margin ranges expected for average stations in the markets where the Company operates | 22.00% | 18.00% | 22.00% | 22.00% | 19.00% |
| Forecasted growth rate (including long-term growth rate) range of the Company's markets | 0.00% | 0.00% | 0.00% | 0.50% | 1.00% |
| Maximum | |||||
| Estimates and assumptions used for impairment test [Line Items] | |||||
| Operating profit margin ranges expected for average stations in the markets where the Company operates | 36.00% | 36.00% | 37.00% | 37.00% | 40.00% |
| Forecasted growth rate (including long-term growth rate) range of the Company's markets | 0.80% | 0.80% | 0.90% | 1.00% | 2.00% |