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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 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	1,843	12,568
Liabilities
Liabilities from derivative contracts	86,560	26,416
Recurring | Level 2
Assets
Assets from derivative contracts	1,843	12,568
Liabilities
Liabilities from derivative contracts	$ 86,560	$ 26,416

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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