STOCK PLANS AND SHARE BASED COMPENSATION (Option Activity) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Option activity under the Plans
Outstanding, shares, beginning of period	697	1,030	1,344
Outstanding, weighted-average exercise price, beginning of period (per share)	$ 28.62	$ 27.58	$ 27.27
Granted, shares	0	0	0
Granted, weighted-average exercise price (per share)	$ 0.00	$ 0.00	$ 0.00
Exercised, shares	(186)	(333)	(311)
Exercised, weighted-average exercise price (per share)	$ 27.48	$ 25.41	$ 26.11
Forfeited or expired, shares	0	0	(3)
Forfeited or expired, weighted-average exercise price (per share)	$ 0.00	$ 0.00	$ 37.97
Outstanding, shares, end of period	511	697	1,030
Outstanding, weighted-average exercise price, end of period (per share)	$ 29.03	$ 28.62	$ 27.58
Outstanding, weighted-average remaining contractual term (in years)	2 years 17 days
Outstanding, aggregate intrinsic value	$ 22,770
Vested and Exercisable, shares	511
Exercisable, weighted-average remaining contractual term (in years)	2 years 17 days
Exercisable, aggregate intrinsic value	$ 22,770
Total intrinsic value of options exercised	$ 8,900	$ 11,500	$ 7,000