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Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Reconciliation Between Basic and Diluted Weighted Average Shares Outstanding


		For the three months ended September 30,								For the nine months ended September 30,
(in thousands, except per share data)		2012				2011				2012				2011

Net income		$	49,504			$	44,173			$	141,408			$	127,501

Net income attributable to unvested awarded performance stock			(1,428	)			(1,395	)			(4,174	)			(3,959	)


Net income attributable to common shares		$	48,076			$	42,778			$	137,234			$	123,542


Weighted average number of common shares outstanding – basic			143,607				143,212				143,418				142,913

Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic			(4,142	)			(4,522	)			(4,233	)			(4,438	)


Weighted average number of common shares outstanding for basic earnings per common share			139,465				138,690				139,185				138,475

Dilutive effect of stock options			2,632				1,753				2,584				1,645


Weighted average number of shares outstanding – diluted			142,097				140,443				141,769				140,120


Net income per share:
Basic		$	0.34			$	0.31			$	0.99			$	0.89

Diluted		$	0.34			$	0.30			$	0.97			$	0.88