Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share Reconciliation [Abstract]

Components Of Basic And Diluted Earnings Per Share

The components of basic and diluted earnings per share are as follows (in thousands, except share and per share data):

	Three Months Ended June 30,					Six Months Ended June 30,
	2012			2011		2012			2011
Numerator for basic and diluted net earnings per common share:
Net earnings	$	31,188		$	28,514	$	59,727		$	59,449
Net earnings available to participating securities (a)	(460		)	—		(922		)	—
Net earnings available to common shareholders	30,728			28,514		58,805			59,449
Denominator:
Weighted-average outstanding shares of common stock	45,373,930			45,399,940		45,887,185			45,247,381
Dilutive effect of:
Dilutive effect of equity incentive plans	195,634			1,323,852		316,306			1,416,485
Common stock and common stock equivalents	45,569,564			46,723,792		46,203,491			46,663,866
Net earnings per share:
Basic	$	0.68		$	0.63	$	1.28		$	1.31
Diluted	$	0.67		$	0.61	$	1.27		$	1.27

(a) Represents unvested share-based payment awards that contain certain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid).