Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Calculation of Net Income Per Share

The calculation of net income per share for the three months ended March 31, 2016 and 2015 is reflected in the following table (in thousands, except per share amounts):

	Three Months Ended   March 31,
	2016		2015
Net income	$	83,416	$	77,922
Basic:
Weighted average shares	129,281		133,077
Diluted:
Weighted average shares	129,281		133,077
Dilutive effect of potential common shares	856		1,209
Diluted weighted average shares	130,137		134,286
Net income per share:
Basic	$	.65	$	.59
Diluted	$	.64	$	.58