Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share

	For the Years Ended December 31,
	2011		2010			2009
NUMERATOR
Basic:
Income from continuing operations	$	162,510	$	157,597		$	151,342
Income (loss) from discontinued operations, net of taxes		—		(404	)		3,612
Net income	$	162,510	$	157,193		$	154,954
Diluted:
Income from continuing operations	$	162,510	$	157,597		$	151,342
Income (loss) from discontinued operations, net of taxes		—		(404	)		3,612
Diluted net income	$	162,510	$	157,193		$	154,954
DENOMINATOR
Basic:
Weighted average common shares outstanding		104,736		112,015			116,088
Diluted:
Weighted average common shares outstanding		104,736		112,015			116,088
Effect of dilutive securities:
Stock options		603		769			976
Restricted stock-based compensation		196		193			226
Weighted average shares and assumed conversions		105,535		112,977			117,290
BASIC EARNINGS PER SHARE:
Income from continuing operations	$	1.55	$	1.41		$	1.30
Income (loss) from discontinued operations, net of taxes		—		(0.01	)		0.03
Net income	$	1.55	$	1.40		$	1.33
DILUTED EARNINGS PER SHARE:
Income from continuing operations	$	1.54	$	1.39		$	1.29
Income (loss) from discontinued operations, net of taxes		—		—			0.03
Net income	$	1.54	$	1.39		$	1.32