STOCK-BASED COMPENSATION (Schedule of Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Options
Options, outstanding beginning balance	1,752,789
Options, granted	2,232
Options, exercised	(432,672)
Options, expired	(1,275)
Options, outstanding ending balance	1,321,074
Weighted Average Exercise Price
Weighted average exercise price, outstanding beginning balance	$ 39.80
Weighted average exercise price, granted	$ 48.70
Weighted average exercise price, exercised	$ 39.31
Weighted average exercise price, expired	$ 39.75
Weighted average exercise price, outstanding ending balance	$ 39.98
Additonal Option Disclosures
Weighted average remaining life (years), outstanding ending balance	5 months 18 days
Aggregate intrinsic value, outstanding ending balance	$ 10,134