STOCK-BASED COMPENSATION (Details 3)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable (in shares) | shares	3,571,732
Options outstanding (in shares) | shares	5,864,216
Under $20.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, minimum, (in dollars per share)	$ 0.00
Range of exercise price, maximum, (in dollars per share)	$ 20.00
Options exercisable (in shares) | shares	1,129,630
Weighted average exercise price, exercisable (in dollars per share)	$ 14.19
Options outstanding (in shares) | shares	1,579,848
Weighted average exercise price, outstanding (in dollars per share)	$ 13.89
$20.00 - $26.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, minimum, (in dollars per share)	20.00
Range of exercise price, maximum, (in dollars per share)	$ 26.00
Options exercisable (in shares) | shares	1,290,236
Weighted average exercise price, exercisable (in dollars per share)	$ 23.77
Options outstanding (in shares) | shares	1,290,236
Weighted average exercise price, outstanding (in dollars per share)	$ 23.77
Over $26.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, minimum, (in dollars per share)	$ 26.00
Options exercisable (in shares) | shares	1,151,866
Weighted average exercise price, exercisable (in dollars per share)	$ 28.49
Options outstanding (in shares) | shares	2,994,132
Weighted average exercise price, outstanding (in dollars per share)	$ 30.22