v3.20.2

INTANGIBLE ASSETS AND GOODWILL - Changes in Goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Roll Forward] |  |  |
Goodwill balance before cumulative loss on impairment as of January 1, |  | $ 1,024,467 | $ 982,663
Accumulated loss on impairment as of January 1, |  | (980,547) | $ (443,194)
Goodwill beginning balance after cumulative loss on impairment as of January 1, | $ 43,920 | 539,469 |
Loss on impairment during year | 0 | (537,353) |
Dispositions | 0 | (4,862) |
Acquisitions | 0 | 46,666 |
Measurement period adjustments to acquired goodwill | (28) | 0 |
Ending period balance | $ 43,892 | $ 43,920 |

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