Earnings Per Share

6 Months Ended

Jun. 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				Six Months Ended
(in thousands, except per share data)	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
Net income	$	69,628	$	62,335	$	126,096	$	118,467
Weighted average shares outstanding – basic	87,638		89,866		87,876		89,962
Dilutive effect of stock plans	1,667		1,860		1,818		1,971
Weighted average shares outstanding – diluted	89,305		91,726		89,694		91,933
Basic earnings per share	$	0.79	$	0.69	$	1.43	$	1.32
Diluted earnings per share	$	0.78	$	0.68	$	1.41	$	1.29
Anti-dilutive shares	169		223		228		230