Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Reconciliation between Basic and Diluted Weighted Average Shares Outstanding

The following is a 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)	2020			2019			2020			2019
Net income	$	133,979		$	115,506		$	383,163		$	321,995
Net income attributable to unvested awarded performance stock		(3,740	)		(3,772	)		(12,634	)		(10,386	)
Net income attributable to common shares	$	130,239		$	111,734		$	370,529		$	311,609
Weighted average number of common shares outstanding – basic		283,426			282,178			283,139			281,505
Less unvested awarded performance stock included in weighted    average number of common shares outstanding – basic		(7,911	)		(9,216	)		(9,336	)		(9,080	)
Weighted average number of common shares outstanding for basic    net income per common share		275,515			272,962			273,803			272,425
Dilutive effect of stock options		1,418			2,113			1,535			2,104
Weighted average number of shares outstanding – diluted		276,933			275,075			275,338			274,529
Net income per share:
Basic	$	0.47		$	0.41		$	1.35		$	1.14
Diluted	$	0.47		$	0.41		$	1.35		$	1.14