FAIR VALUE PRESENTATION (Schedule of Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 14,512	$ 47,220
Currency options designated as hedging instruments (current liabilities)	(1)	(3)
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	1,011	991
Currency options designated as hedging instruments (current liabilities)
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	13,501	46,229
Currency options designated as hedging instruments (current liabilities)	$ (1)	$ (3)