Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

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,
	2013		2012		2013		2012
Net income	$	21,259	$	25,128	$	64,610	$	77,053
Weighted average common shares outstanding	72,621		72,879		72,965		72,864
Dilutive effect of stock-based awards	595		566		565		550
Shares used in computing diluted earnings per share	73,216		73,445		73,530		73,414
Basic earnings per share	$	0.29	$	0.34	$	0.89	$	1.06
Diluted earnings per share	$	0.29	$	0.34	$	0.88	$	1.05