BUSINESS COMBINATIONS - Preliminary purchase price allocations (Details) - USD ($) $ in Thousands |
Jun. 30, 2020 |
Dec. 31, 2019 |
Jul. 19, 2019 |
May 09, 2019 |
Dec. 31, 2018 |
|---|---|---|---|---|---|
| Business Acquisition [Line Items] | |||||
| Goodwill | $ 43,892 | $ 43,920 | $ 539,469 | ||
| Pineapple Street Media | |||||
| Business Acquisition [Line Items] | |||||
| Accounts receivable | $ 997 | ||||
| Goodwill | 12,445 | ||||
| Total assets | 15,235 | ||||
| Unearned revenue | 238 | ||||
| Accounts payable | 30 | ||||
| Total liabilities | 268 | ||||
| Preliminary fair value of net assets acquired | 14,967 | ||||
| Pineapple Street Media | Trademarks and Trade Names | |||||
| Business Acquisition [Line Items] | |||||
| Intangible assets | $ 1,793 | ||||
| 2019 Cumulus Exchange | |||||
| Business Acquisition [Line Items] | |||||
| Total tangible property | $ 844 | ||||
| Goodwill | 2,080 | ||||
| Total tangible and other assets | 21,656 | ||||
| Total assets | 22,500 | ||||
| Preliminary fair value of net assets acquired | 22,500 | ||||
| 2019 Cumulus Exchange | Equipment | |||||
| Business Acquisition [Line Items] | |||||
| Total tangible property | 844 | ||||
| 2019 Cumulus Exchange | Licensing Agreements | |||||
| Business Acquisition [Line Items] | |||||
| Intangible assets | $ 19,576 |