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 1.9 million and 2.1 million for the three months ended September 30, 2014 and 2013, respectively, and approximately 2.0 million and 2.1 million for the nine months ended September 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						Nine Months Ended
	September 30,						September 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	$	38,283		$	34,044		$	113,591		$	109,994
Amount allocated to participating securities	(317		)	(623		)	(970		)	(1,958		)
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	37,966			33,421			112,621			108,036
Discontinued operations, including gain on sale, attributable to common shareholders	—			36,676			—			96,374
Net income attributable to common shareholders – basic	$	37,966		$	70,097		$	112,621		$	204,410

Earnings per common share continuing operations	$	0.43		$	0.38		$	1.28		$	1.24
Earnings per common share from discontinued operations	—			0.42			—			1.11
Total earnings per common share – basic	$	0.43		$	0.80		$	1.28		$	2.35

Weighted average number of common shares outstanding – basic	88,146			87,449			87,882			87,117



	Three Months Ended				Nine Months Ended
	September 30,				September 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	$	37,966	$	33,421	$	112,621	$	108,036
Income allocated to common units from continuing operations	313		274		937		814
Income from continuing operations attributable to common shareholders, as adjusted	38,279		33,695		113,558		108,850
Discontinued operations, including gain on sale, attributable to common shareholders	—		36,676		—		96,374
Discontinued operations, including gain on sale, allocated to common units	—		53		—		1,910
Net income attributable to common shareholders – diluted	$	38,279	$	70,424	$	113,558	$	207,134

Earnings per common share from continuing operations	$	0.43	$	0.38	$	1.28	$	1.23
Earnings per common share from discontinued operations	—		0.41		—		1.11
Total earnings per common share – diluted	$	0.43	$	0.79	$	1.28	$	2.34

Weighted average number of common shares outstanding – basic	88,146		87,449		87,882		87,117
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted	396		453		358		497
Common units	811		814		812		815
Weighted average number of common shares outstanding – diluted	89,353		88,716		89,052		88,429