STOCK BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2012

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, 2012	1,280,866		$	43.23
Options granted	34,500		$	72.61
Options exercised	(50,140	)	$	41.28		$	1,544
Options canceled/forfeited	(2,010	)	$	45.10
Outstanding options at March 31, 2012	1,263,216		$	44.11	5.53	$	34,810
Exercisable options at March 31, 2012	568,016		$	39.80	4.44	$	18,087

					Weighted
			Weighted		Average	Aggregate
	Number of		Average		Remaining	Intrinsic
	Options		Exercise		Contractual	Value
	Outstanding		Price		Life	(in 000’s)
Outstanding options at January 1, 2011	1,524,982		$	41.32
Options granted	19,950		$	55.28
Options exercised	(177,857	)	$	28.00		$	4,711
Options canceled/forfeited	(7,130	)	$	44.59
Outstanding options at March 31, 2011	1,359,945		$	43.25	5.89	$	19,583
Exercisable options at March 31, 2011	668,875		$	40.79	5.07	$	11,274

Schedule of stock option assumptions for fair value estimate

	2012			2011
Weighted-average fair value of grants	$	14.68		$	12.14
Risk-free interest rates	1.00		%	2.41		%
Dividend yield	1.92		%	1.89		%
Expected volatility	25.79		%	25.85		%
Expected option life	5.8 years			6.05 years