Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Calculation of Net Income Per Share

The calculation of net income per share for the three and six months ended June 30, 2015 and 2014 is reflected in the following table (in thousands, except per share amounts):

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2015		2014		2015		2014
Net income	$	89,706	$	75,140	$	167,628	$	136,691
Basic:
Weighted average shares	132,499		134,699		132,786		135,014
Diluted:
Weighted average shares	132,499		134,699		132,786		135,014
Dilutive effect of potential common shares	1,054		1,009		1,132		918
Diluted weighted average shares	133,553		135,708		133,918		135,932
Net income per share:
Basic	$	.68	$	.56	$	1.26	$	1.01
Diluted	$	.67	$	.55	$	1.25	$	1.01

Weighted Average Diluted Common Shares Outstanding

The weighted average diluted common shares outstanding for the three and six months ended June 30, 2015 and 2014, excludes the effect of the following (in thousands):

	Three Months Ended   June 30,		Six Months Ended   June 30,
	2015	2014	2015	2014
Total number of anti-dilutive potential common shares	247	322	127	171