STOCK CAPITAL (Schedule of RSU Activity) (Details) - Restricted Stock Units (RSUs) [Member] - Employees and Members of Board of Directors [Member]	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Number of RSUs
Unvested as of December 31, 2018 | shares	2,807,232
Granted | shares	480,022
Vested | shares	(487,906)
Forfeited | shares	(145,142)
Unvested as of June 30, 2019 (unaudited) | shares	2,654,206
Weighted average grant date fair value
Unvested as of December 31, 2018 | $ / shares	$ 34.40
Granted | $ / shares	43.85
Vested | $ / shares	32.49
Forfeited | $ / shares	36.27
Unvested as of June 30, 2019 (unaudited) | $ / shares	$ 36.36