3. Per Share Data

Basic earnings per share are computed using net income attributable to common shareholders and the weighted average number of common shares outstanding. Diluted earnings per share reflect common shares issuable from the assumed conversion of common share options and share awards granted and units convertible into common shares. Only those items having a dilutive impact on our basic earnings per share are included in diluted earnings per share. Our unvested share-based awards are considered participating securities and are reflected in the calculation of basic and diluted earnings per share using the two-class method. The number of common share equivalent securities excluded from the diluted earnings per share calculation was approximately 2.0 million and 2.2 million for the three months ended June 30, 2014 and 2013, respectively, and approximately 2.1 million and 2.2 million for the six months ended June 30, 2014 and 2013, respectively. These securities, which include common share options and share awards granted and units convertible into common shares, were excluded from the diluted earnings per share calculation as they are anti-dilutive.

The following table presents information necessary to calculate basic and diluted earnings per share for the periods indicated:



	Three Months Ended						Six Months Ended
	June 30,						June 30,
(in thousands, except per share amounts)	2014			2013			2014			2013
Earnings per common share calculation – basic
Income from continuing operations attributable to common shareholders	$	35,272		$	46,938		$	75,308		$	75,950
Amount allocated to participating securities	(300		)	(696		)	(653		)	(1,335		)
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	34,972			46,242			74,655			74,615
Discontinued operations attributable to common shareholders	—			25,234			—			59,698
Net income attributable to common shareholders – basic	$	34,972		$	71,476		$	74,655		$	134,313

Earnings per common share continuing operations	$	0.40		$	0.53		$	0.85		$	0.86
Earnings per common share from discontinued operations	—			0.29			—			0.68
Total earnings per common share – basic	$	0.40		$	0.82		$	0.85		$	1.54

Weighted average number of common shares outstanding – basic	87,845			87,191			87,748			86,949



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share amounts)	2014		2013		2014		2013
Earnings per common share calculation – diluted
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	$	34,972	$	46,242	$	74,655	$	74,615
Income allocated to common units from continuing operations	314		265		623		541
Income from continuing operations attributable to common shareholders, as adjusted	35,286		46,507		75,278		75,156
Discontinued operations attributable to common shareholders	—		25,234		—		59,698
Net income attributable to common shareholders – diluted	$	35,286	$	71,741	$	75,278	$	134,854

Earnings per common share from continuing operations	$	0.40	$	0.53	$	0.85	$	0.85
Earnings per common share from discontinued operations	—		0.28		—		0.68
Total earnings per common share – diluted	$	0.40	$	0.81	$	0.85	$	1.53

Weighted average number of common shares outstanding – basic	87,845		87,191		87,748		86,949
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted	314		467		338		519
Common units	813		814		813		815
Weighted average number of common shares outstanding – diluted	88,972		88,472		88,899		88,283