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DERIVATIVE INSTRUMENTS (Schedule of Notional Amounts of Outstanding Derivative Contracts) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Derivative [Line Items]    
Total derivatives $ 37,281 $ 58,153
Derivatives designated as hedging instruments [Member] | Currency forward contracts [Member]    
Derivative [Line Items]    
Total derivatives 22,510 29,621
Derivatives not designated as hedging instruments [Member] | Currency forward and option contracts [Member]    
Derivative [Line Items]    
Total derivatives $ 14,771 $ 28,532