STOCK BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2016

STOCK BASED COMPENSATION

Schedule of stock option activity

				Weighted
		Weighted		Average	Aggregate
	Number of	Average		Remaining	Intrinsic
	Options	Exercise		Contractual	Value
	Outstanding	Price		Life	(in 000’s)
Outstanding options at January 1, 2016	2,582,220	$	32.42
Options granted	410,250	$	64.15
Options exercised	(638,675)	$	23.67		$	27,704
Options canceled/forfeited	(8,940)	$	41.90
Outstanding options at September 30, 2016	2,344,855	$	40.32	5.12	$	65,748
Exercisable options at September 30, 2016	939,785	$	31.10	3.58	$	35,016
				Weighted
		Weighted		Average	Aggregate
	Number of	Average		Remaining	Intrinsic
	Options	Exercise		Contractual	Value
	Outstanding	Price		Life	(in 000’s)
Outstanding options at January 1, 2015	2,892,717	$	26.65
Options granted	517,000	$	50.09
Options exercised	(511,187)	$	18.27		$	17,845
Options canceled/forfeited	(4,560)	$	31.87
Outstanding options at September 30, 2015	2,893,970	$	32.31	5.29	$	61,522
Exercisable options at September 30, 2015	1,197,470	$	23.89	4.01	$	35,497

Schedule of stock option assumptions for fair value estimate

	2016			2015
Weighted-average fair value of grants	$	11.47		$	9.04
Risk-free interest rates		1.21	%		1.53	%
Dividend yield		1.61	%		1.81	%
Expected volatility		23.06	%		22.89	%
Expected option life		5.04	years		5.21	years