STOCKHOLDERS' EQUITY (Schedule of RSU Activity) (Details) - Restricted Stock Units (RSUs) [Member] - Employees and Members of Board of Directors [Member]	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Number of RSUs
Unvested as of December 31, 2019 | shares	2,742,589
Granted | shares	153,481
Vested | shares	(547,706)
Forfeited | shares	(107,688)
Unvested as of June 30, 2020 | shares	2,240,676
Weighted average grant date fair value
Unvested as of December 31, 2019 | $ / shares	$ 52.77
Granted | $ / shares	88.41
Vested | $ / shares	41.92
Forfeited | $ / shares	54.76
Unvested as of June 30, 2020 | $ / shares	$ 57.77