Earnings per share

9 Months Ended

Sep. 30, 2011

Note 4: Earnings per share

The following table reflects the calculation of basic and diluted earnings per share from continuing operations. During each period, certain options, as noted below, were excluded from the calculation of diluted earnings per share because their effect would have been antidilutive.

	Quarter Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Earnings per share – basic:
Income from continuing operations	$	36,735		$	51,172		$	104,764		$	118,570
Income allocated to participating securities		(240	)		(267	)		(565	)		(627	)
Income available to common shareholders	$	36,495		$	50,905		$	104,199		$	117,943

Weighted-average shares outstanding		50,889			51,171			51,112			51,120
Earnings per share – basic	$	0.72		$	0.99		$	2.04		$	2.31

Earnings per share – diluted:
Income from continuing operations	$	36,735		$	51,172		$	104,764		$	118,570
Income allocated to participating securities		(166	)		(265	)		(325	)		(625	)
Re-measurement of share-based awards classified as liabilities		(77	)		2			(65	)		53
Income available to common shareholders	$	36,492		$	50,909		$	104,374		$	117,998

Weighted-average shares outstanding		50,889			51,171			51,112			51,120
Dilutive impact of potential common shares		314			191			431			197
Weighted-average shares and potential common shares outstanding		51,203			51,362			51,543			51,317

Earnings per share – diluted	$	0.71		$	0.99		$	2.02		$	2.30

Antidilutive options excluded from calculation		1,961			2,357			1,961			2,357

Earnings per share amounts for continuing operations, discontinued operations and net income, as presented on the consolidated statements of income, are calculated individually and may not sum due to rounding differences.