Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Summary Of Earnings Per Share, Basic And Diluted

The calculation and reconciliation of basic and diluted earnings per share for the three and nine months ended September 30 (in thousands, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Net income	$	59,648	$	40,514	$	156,128	$	109,563
Denominator for basic and diluted earnings per share:
Weighted-average shares outstanding		83,229		79,790		82,435		79,093
Share-based payment awards classified as participating securities		773		1,029		825		1,212
Denominator for basic earnings per share		84,002		80,819		83,260		80,305
Dilutive securities		2,222		2,830		2,421		3,221
Denominator for diluted earnings per share		86,224		83,649		85,681		83,526
Basic earnings per share	$	0.71	$	0.50	$	1.88	$	1.36
Diluted earnings per share	$	0.69	$	0.48	$	1.82	$	1.31