COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| COMMITMENTS AND CONTINGENCIES | ||
| Right of use assets obtained in exchange for new operating lease liabilities | $ 39,800 | $ 57,900 |
| Obligation to pay rent through the remaining amended lease term | 93,530 | |
| Amortization expense | $ 23,744 | $ 11,940 |