Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share

Basic And Diluted Earnings Per Share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income	$	27,518	$	20,930	$	43,811	$	31,766
Weighted-average common shares outstanding		72,794		72,280		72,749		72,141
Dilutive effect of stock-based awards		445		487		441		517
Shares used in computing diluted earnings per share		73,239		72,767		73,190		72,658
Basic earnings per share	$	0.38	$	0.29	$	0.60	$	0.44
Diluted earnings per share	$	0.38	$	0.29	$	0.60	$	0.44