Net Income Per Share

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Net Income Per Share

Net Income Per Share

The calculation of net income per share for the three and six months ended June 30, 2016 and 2015 is reflected in the following table (in thousands, except per share amounts):

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2016		2015		2016		2015
Net income	$	91,616	$	89,706	$	175,032	$	167,628
Basic:
Weighted average shares	128,586		132,499		128,933		132,786
Diluted:
Weighted average shares	128,586		132,499		128,933		132,786
Dilutive effect of potential common shares	743		1,054		800		1,132
Diluted weighted average shares	129,329		133,553		129,733		133,918
Net income per share:
Basic	$	.71	$	.68	$	1.36	$	1.26
Diluted	$	.71	$	.67	$	1.35	$	1.25

Potential common shares include the dilutive effect of stock options, unvested performance-based restricted stock, restricted stock which contains forfeitable rights to dividends, and stock units. The weighted average diluted common shares outstanding for the three and six months ended June 30, 2016 and 2015, excludes the effect of the following (in thousands): 

	Three Months Ended   June 30,		Six Months Ended   June 30,
	2016	2015	2016	2015
Total number of anti-dilutive potential common shares	654	247	441	127