SHARE-BASED COMPENSATION (Details 2) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance, beginning of year (in shares) | shares	3,304,181
Granted (in shares) | shares	1,261,693
Exercise of options (in shares) | shares	(731,935)
Canceled (in shares) | shares	(150,153)
Balance, end of year (in shares) | shares	3,683,786
Options exercisable, end of year (in shares) | shares	1,910,058
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Balance, beginning of year (in dollars per share) | $ / shares	$ 13.67
Granted (in dollars per share) | $ / shares	31.84
Exercised (in dollars per share) | $ / shares	13.32
Canceled (in dollars per share) | $ / shares	22.83
Balance, end of year (in dollars per share) | $ / shares	19.59
Options exercisable, end of year (in dollars per share) | $ / shares	$ 16.05
Options outstanding, Weighted-Average Remaining Contractual Term (years)	7 years 3 months 18 days
Options exercisable, Weighted-Average Remaining Contractual Term (years)	6 years 1 month 6 days
Options outstanding, Aggregate Intrinsic Value | $	$ 85.6
Options exercisable, Aggregate Intrinsic Value | $	$ 50.4