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DERIVATIVE INSTRUMENTS (Schedule of the Fair Value Open Foreign Exchange Contracts) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Fair value of foreign exchange hedge transactions $ 2,258 $ 158
Fair value of foreign exchange hedge transactions (3,224) (1,041)
Total derivatives designated as hedging instruments $ (326) $ (846)