LEASES - Supplemental cash flow information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| LEASES | ||||
| Operating cash flows from operating leases, Cash paid for amounts included in the measurement of lease liabilities | $ 4,062 | $ 5,441 | $ 13,871 | $ 13,527 |
| Operating leases, Right of use assets obtained in exchange for lease obligations | $ 16 | $ 462 | $ 200 | $ 3,021 |