STOCK-BASED COMPENSATION (Analysis of Stock Options Award Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)
Shares
Outstanding at beginning of period (in shares) | shares	1,383,880
Granted (in shares) | shares	180,912
Exercised (in shares) | shares	(336,215)
Forfeited or expired (in shares) | shares	(107,900)
Outstanding at end of period ( in shares) | shares	1,120,677	1,383,880
Exercisable at end of period (in shares) | shares	462,639
Weighted-Average Exercise Price
Outstanding at beginning of period (in usd per share) | $ / shares	$ 28.66
Granted (in usd per share) | $ / shares	39.91
Exercised (in usd per share) | $ / shares	30.26
Forfeited or expired (in usd per share) | $ / shares	38.24
Outstanding at end of period (in usd per share) | $ / shares	29.08	$ 28.66
Exercisable at end of period (in usd per share) | $ / shares	$ 25.85
Outstanding at end of period, weighted-average remaining life (in years)	6 years 7 months 17 days
Exercisable at end of period, weighted-average remaining life (in years)	2 years 10 months
Outstanding at end of period, aggregate intrinsic value | $	$ 22,519
Outstanding at end of period, aggregate intrinsic value | $	10,789
Intrinsic value of options exercised | $	$ 4,339	$ 1,546	$ 790