Share-Based Employee Compensation Plans And Other Compensation and Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Summary of stock options

	Shares (in thousands)	Weighted-Average Exercise Price
Outstanding at December 31, 2011	7,491	$	37.38
Granted	1,045		89.57
Exercised	(1,045)		27.56
Forfeited	(345)		56.39
Outstanding at June 30, 2012	7,146		45.53
Exercisable at June 30, 2012	3,447	$	30.25

Black-Scholes option pricing model

	For the Six Months Ended June 30,
	2012		2011
Risk free interest rate	0.67	%	1.63	%
Expected life	4.1	Years	4.1	Years
Expected volatility	33.7	%	33.4	%
Expected dividend yield	-	%	-	%

Stock Option [Member]

Summary of activity of share-based employee compensation plans and other compensation and benefit plans

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2012		2011		2012		2011
Compensation expense for stock options awarded	$	4,835	$	4,679	$	9,216	$	9,124
Income tax benefit from compensation expense related to stock options	$	1,862	$	1,792	$	3,548	$	3,495

Employee Stock Purchase Plan [Member] | Restricted Stock [Member]

Summary of activity of share-based employee compensation plans and other compensation and benefit plans

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2012		2011		2012		2011
Compensation expense for shares issued under the ESPP	$	376	$	314	$	738	$	626
Income tax benefit from compensation expense related to shares issued under the ESPP		145		120		284		240
Compensation expense for restricted shares awarded		456		404		937		782
Income tax benefit from compensation expense related to restricted awards	$	176	$	155	$	361	$	300