Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Basic And Diluted Earnings Per Share

The computation of basic and diluted earnings per share is shown below (in thousands, except per share amounts).

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Net income	$	25,128	$	29,578	$	77,053	$	73,389
Weighted average common shares outstanding	72,879		72,811		72,864		72,770
Dilutive effect of stock-based awards	566		420		550		433
Shares used in computing diluted earnings per share	73,445		73,231		73,414		73,203
Basic earnings per share	$	0.34	$	0.41	$	1.06	$	1.01
Diluted earnings per share	$	0.34	$	0.40	$	1.05	$	1.00