Earnings Per Share

9 Months Ended

Sep. 30, 2016

Basic earnings per share ("EPS") amounts are computed by dividing earnings by the weighted average number of common shares outstanding during the period. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive equivalents outstanding. To the extent stock options are anti-dilutive, they are excluded from the calculation of diluted EPS.

The details of basic and diluted EPS are as follows:



	Three Months Ended				Nine Months Ended
(in thousands, except per share data)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Net income	$	69,557	$	66,033	$	195,653	$	184,500
Weighted average shares outstanding – basic	86,959		89,694		87,570		89,873
Dilutive effect of stock plans	1,717		1,899		1,785		1,947
Weighted average shares outstanding – diluted	88,676		91,593		89,355		91,820
Basic earnings per share	$	0.80	$	0.74	$	2.23	$	2.05
Diluted earnings per share	$	0.78	$	0.72	$	2.19	$	2.01
Anti-dilutive shares	269		204		242		221