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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Assets |  |
Asset transfers between levels | $ 0 | $ 0
Liabilities |  |
Liability transfers between levels | 0 | 0
Recurring | Total |  |
Assets |  |
Assets from derivative contracts | 923 | 12,568
Liabilities |  |
Liabilities from derivative contracts | 83,823 | 26,416
Recurring | Level 2 |  |
Assets |  |
Assets from derivative contracts | 923 | 12,568
Liabilities |  |
Liabilities from derivative contracts | $ 83,823 | $ 26,416

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