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DERIVATIVE INSTRUMENTS (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]      
Fair value of derivative instruments $ 15   $ 42
Loss recognized in income related to the effective portion of its hedging instruments 48 $ 121  
Estimated existing losses expected to be reclassified to income (loss) $ 140