Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Reconciliation between Basic and Diluted Weighted Average Shares Outstanding

	For the three months   ended March 31,
(in thousands, except per share data)	2019			2018
Net income	$	113,896		$	90,828
Net income attributable to unvested awarded performance stock	(3,201		)	(1,902		)
Net income attributable to common shares	$	110,695		$	88,926
Weighted average number of common shares outstanding – basic	280,564			275,952
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic	(7,885		)	(5,780		)
Weighted average number of common shares outstanding for basic net income per common share	272,679			270,172
Dilutive effect of stock options	2,335			5,542
Weighted average number of shares outstanding – diluted	275,014			275,714
Net income per share:
Basic	$	0.41		$	0.33
Diluted	$	0.40		$	0.32