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COMMITMENTS AND CONTINGENCIES - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash flows from operating leases | $ 19,835 | $ 12,827
Operating cash flows from finance leases | 723 | 125
Finance cash flows from finance leases | 3,805 | 620
Non-cash investing and financing activities: |  |
Right-of-use assets obtained in exchange for new operating lease liabilities | 60,480 | 13,662
Right-of-use assets obtained in exchange for new finance lease liabilities | $ 4,296 | $ 17,420
Operating lease, weighted average lease term remaining | 8 years 1 month 20 days | 8 years 11 months 12 days
Finance lease, weighted average remaining lease term | 3 years 1 month 17 days | 3 years 10 months 9 days
Operating lease, weighted average discount rate | 6.28% | 6.83%
Finance lease, weighted average discount rate | 5.42% | 5.87%
Thrive |  |
Non-cash investing and financing activities: |  |
Right-of-use assets obtained in exchange for new operating lease liabilities | $ 39,600 |

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