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



	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands, except per share amounts)	2017			2016			2017			2016
Earnings per common share calculation – basic
Income from continuing operations attributable to common shareholders	$	34,384		$	290,898		$	108,433		$	396,088
Amount allocated to participating securities	(21		)	(1,625		)	(133		)	(6,142		)
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	$	34,363		$	289,273		$	108,300		$	389,946
Income from discontinued operations, including gain on sale, attributable to common shareholders	—			—			—			382,842
Net income attributable to common shareholders – basic	$	34,363		$	289,273		$	108,300		$	772,788

Earnings per common share from continuing operations	$	0.38		$	3.23		$	1.20		$	4.35
Earnings per common share from discontinued operations	—			—			—			4.28
Total earnings per common share – basic	$	0.38		$	3.23		$	1.20		$	8.63

Weighted average number of common shares outstanding – basic	91,011			89,669			90,351			89,524



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2017		2016		2017		2016
Earnings per common share calculation – diluted
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	$	34,363	$	289,273	$	108,300	$	389,946
Income allocated to common units from continuing operations	294		—		869		—
Income from continuing operations attributable to common shareholders, as adjusted	$	34,657	$	289,273	$	109,169	$	389,946
Income from discontinued operations, including gain on sale, attributable to common shareholders	—		—		—		382,842
Net income attributable to common shareholders – diluted	$	34,657	$	289,273	$	109,169	$	772,788

Earnings per common share from continuing operations	$	0.38	$	3.21	$	1.20	$	4.34
Earnings per common share from discontinued operations	—		—		—		4.26
Total earnings per common share – diluted	$	0.38	$	3.21	$	1.20	$	8.60

Weighted average number of common shares outstanding – basic	91,011		89,669		90,351		89,524
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted	217		343		189		334
Common units	805		—		805		—
Weighted average number of common shares outstanding – diluted	92,033		90,012		91,345		89,858