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DERIVATIVE INSTRUMENTS (Schedule of Fair Value of Derivative Contracts) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Other accounts receivable and prepaid expenses [Member]    
Derivative [Line Items]    
Total derivatives $ 770 $ 1,937
Other accounts payable and accrued expenses [Member]    
Derivative [Line Items]    
Total derivatives 370 281
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member] | Other accounts receivable and prepaid expenses [Member]    
Derivative [Line Items]    
Total derivatives 300 1,847
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member] | Other accounts payable and accrued expenses [Member]    
Derivative [Line Items]    
Total derivatives 255 2
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member] | Other accounts receivable and prepaid expenses [Member]    
Derivative [Line Items]    
Total derivatives 470 90
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member] | Other accounts payable and accrued expenses [Member]    
Derivative [Line Items]    
Total derivatives $ 115 $ 279