Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings per share:

Schedule Of Earnings Per Share Basic And Diluted By Common Class Text Block

				Three months ended				Six months ended
			June 30,				June 30,
				2011		2010		2011		2010
Earnings:
	Net income (numerator for basic and diluted calculations)		$	132,888	$	127,019	$	293,704	$	249,458
Shares:
	Weighted average outstanding shares (denominator for
		basic calculation)		73,971		73,141		73,593		73,094
	Equivalent shares from outstanding stock options(1)			559		1,580		591		1,556
	Denominator for diluted calculation			74,530		74,721		74,184		74,650
Earnings per share:
	Basic		$	1.80	$	1.74	$	3.99	$	3.41
	Diluted		$	1.78	$	1.70	$	3.96	$	3.34
	(1) Year-to-date amounts are weighted average of the individual quarterly amounts.