STOCK BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2019

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, 2019	1,964,880	$	54.24
Options granted	40,750	$	66.16
Options exercised	(50,580)	$	33.71		$	1,795
Options canceled/forfeited	(19,100)	$	57.28
Outstanding options at March 31, 2019	1,935,950	$	55.00	5.14	$	32,589
Exercisable options at March 31, 2019	702,250	$	47.84	3.73	$	16,794
				Weighted
		Weighted		Average	Aggregate
	Number of	Average		Remaining	Intrinsic
	Options	Exercise		Contractual	Value
	Outstanding	Price		Life	(in 000’s)
Outstanding options at January 1, 2018	2,257,015	$	46.80
Options granted	36,750	$	64.42
Options exercised	(147,370)	$	30.01		$	5,001
Options canceled/forfeited	(4,800)	$	62.55
Outstanding options at March 31, 2018	2,141,595	$	48.22	4.90	$	32,883
Exercisable options at March 31, 2018	853,835	$	40.27	3.32	$	19,834

Schedule of stock option assumptions for fair value estimate

	2019			2018
Weighted-average fair value of grants	$	11.35		$	9.16
Risk-free interest rates		2.94	%		2.02	%
Dividend yield		2.98	%		3.60	%
Expected volatility		22.84	%		22.93	%
Expected option life		5.11	years		5.13	years