Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Reconciliation Of Amounts Used To Calculate Basic And Diluted Earnings Per Share

	Three months ended						Six months ended
	June 30, 2012			June 30, 2011			June 30, 2012			June 30, 2011
Income (loss) from continuing operations	$	51,305		$	9,180		$	22,609		$	(99,664	)
Provision for income taxes from discontinued operations	28			127			55			253
Loss from discontinued operations	(28		)	(127		)	(55		)	(253		)
Net income (loss)	$	51,277		$	9,053		$	22,554		$	(99,917	)
Basic:
Weighted average number of common shares outstanding	36,478			35,983			36,392			35,742
Income (loss) from continuing operations	$	1.41		$	0.26		$	0.62		$	(2.79	)
Loss from discontinued operations	—			(0.01		)	—			(0.01		)
Net income (loss) per share of common stock	$	1.41		$	0.25		$	0.62		$	(2.80	)
Assuming dilution:
Weighted average number of common shares outstanding	36,478			35,983			36,392			35,742
Effect of dilutive securities	716			725			730			—
Weighted average number of common and common    equivalent shares outstanding	37,194			36,708			37,122			35,742
Income (loss) from continuing operations	$	1.38		$	0.25		$	0.61		$	(2.79	)
Loss from discontinued operations	—			—			—			(0.01		)
Net income (loss) per share of common stock	$	1.38		$	0.25		$	0.61		$	(2.80	)