The computation of basic and diluted earnings per common share is as follows (in thousands, except share and per share data):



	For the three months ended September 30,						For the nine months ended September 30,
	2013			2012			2013			2012
Numerator:
Net income attributable to common shareholders before discontinued operations	$	33,290		$	15,917		$	80,089		$	28,568
Add: Income (loss) from discontinued operations	3,179			(721		)	5,387			(1,000		)
Net income attributable to common shareholders	36,469			15,196			85,476			27,568
Less: Dividends paid on unvested restricted shares	(216		)	(183		)	(712		)	(594		)
Less: Undistributed earnings attributable to unvested restricted shares	(97		)	—			(86		)	—
Net income attributable to common shareholders excluding amounts attributable to unvested restricted shares	$	36,156		$	15,013		$	84,678		$	26,974
Denominator:
Weighted-average number of common shares - basic	121,594,219			105,453,978			116,697,417			105,392,071
Unvested restricted shares	249,029			55,126			212,672			54,140
Unvested performance units	906,873			—			887,581			—
Weighted-average number of common shares - diluted	122,750,121			105,509,104			117,797,670			105,446,211

Net income per share attributable to common shareholders before discontinued operations - basic	$	0.27		$	0.15		$	0.68		$	0.27
Discontinued operations	0.03			(0.01		)	0.05			(0.01		)
Net income per share attributable to common shareholders - basic	$	0.30		$	0.14		$	0.73		$	0.26

Net income per share attributable to common shareholders before discontinued operations - diluted	$	0.27		$	0.15		$	0.67		$	0.27
Discontinued operations	0.03			(0.01		)	0.05			(0.01		)
Net income per share attributable to common shareholders - diluted	$	0.30		$	0.14		$	0.72		$	0.26