Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings (Loss) Per Share [Abstract]

Computation Of Earnings Per Share

	Year Ended December 31,
	2011		2010		2009
Weighted average shares:
Weighted average common shares outstanding		53,854		57,143		59,306
Effect of dilutive securities outstanding		337		285		119
Diluted weighted average shares outstanding		54,191		57,428		59,425
Earnings (loss):
Income from continuing operations	$	130,343	$	104,614	$	48,491
Income (loss) from discontinued operations		44,300		(2,836)		(1,387)
Net Income	$	174,643	$	101,778	$	47,104
Basic per share amounts:
Income from continuing operations	$	2.42	$	1.83	$	0.81
Income (loss) from discontinued operations		0.82		(0.05)		(0.02)
Net Income	$	3.24	$	1.78	$	0.79
Diluted per share amounts:
Income from continuing operations	$	2.40	$	1.82	$	0.81
Income (loss) from discontinued operations		0.82		(0.05)		(0.02)
Net Income	$	3.22	$	1.77	$	0.79

Potentially Dilutive Securities Excluded From Earnings Per Share Calculation

	Year Ended December 31,
	2011		2010		2009
Potentially dilutive shares		1,425,880		1,844,038		2,350,854