STOCK-BASED COMPENSATION (Analysis of Stock Options Award Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($)
Shares
Outstanding at beginning of period (in shares) | shares	1,358,289
Granted (in shares) | shares	332,729
Exercised (in shares) | shares	(193,088)
Forfeited or expired (in shares) | shares	(114,050)
Outstanding at end of period ( in shares) | shares	1,383,880	1,358,289
Exercisable at end of period (in shares) | shares	667,106
Weighted-Average Exercise Price
Outstanding at beginning of period (in usd per share) | $ / shares	$ 28.70
Granted (in usd per share) | $ / shares	29.17
Exercised (in usd per share) | $ / shares	27.96
Forfeited or expired (in usd per share) | $ / shares	31.84
Outstanding at end of period (in usd per share) | $ / shares	28.66	$ 28.70
Exercisable at end of period (in usd per share) | $ / shares	$ 29.76
Outstanding at end of period, Weighted-Average Remaining Life (in years)	5 years 10 months 2 days
Exercisable at end of period, Weighted-Average Remaining Life (in years)	3 years 5 months 8 days
Outstanding at end of period, Aggregate Intrinsic Value | $	$ 13,435
Outstanding at end of period, Aggregate Intrinsic Value | $	5,785
Intrinsic value of options exercised | $	$ 1,546	$ 790	$ 1,383