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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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