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)	2016			2015			2016			2015
Earnings per common share calculation – basic
Income from continuing operations attributable to common shareholders	$	290,898		$	32,137		$	396,088		$	173,890
Amount allocated to participating securities	(1,625		)	(259		)	(6,142		)	(1,562		)
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	$	289,273		$	31,878		$	389,946		$	172,328
Income from discontinued operations, including gain on sale, attributable to common shareholders	—			4,907			382,842			14,832
Net income attributable to common shareholders – basic	$	289,273		$	36,785		$	772,788		$	187,160

Earnings per common share from continuing operations	$	3.23		$	0.36		$	4.35		$	1.93
Earnings per common share from discontinued operations	—			0.05			4.28			0.17
Total earnings per common share – basic	$	3.23		$	0.41		$	8.63		$	2.10

Weighted average number of common shares outstanding – basic	89,669			89,164			89,524			89,102



	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2016		2015		2016		2015
Earnings per common share calculation – diluted
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities	$	289,273	$	31,878	$	389,946	$	172,328
Income from discontinued operations, including gain on sale, attributable to common shareholder	—		4,907		382,842		14,832
Net income attributable to common shareholders – diluted	$	289,273	$	36,785	$	772,788	$	187,160

Earnings per common share from continuing operations	$	3.21	$	0.36	$	4.34	$	1.93
Earnings per common share from discontinued operations	—		0.05		4.26		0.16
Total earnings per common share – diluted	$	3.21	$	0.41	$	8.60	$	2.09

Weighted average number of common shares outstanding – basic	89,669		89,164		89,524		89,102
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted	343		366		334		348
Weighted average number of common shares outstanding – diluted	90,012		89,530		89,858		89,450