Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Calculation of Net Income Per Share

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

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2015		2014		2015		2014
Net income	$	96,725	$	85,184	$	264,353	$	221,875
Basic:
Weighted average shares	131,285		134,054		132,280		134,690
Diluted:
Weighted average shares	131,285		134,054		132,280		134,690
Dilutive effect of potential common shares	1,203		1,312		1,156		1,050
Diluted weighted average shares	132,488		135,366		133,436		135,740
Net income per share:
Basic	$	.74	$	.64	$	2.00	$	1.65
Diluted	$	.73	$	.63	$	1.98	$	1.63

Weighted Average Diluted Common Shares Outstanding

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

	Three Months Ended   September 30,		Nine Months Ended   September 30,
	2015	2014	2015	2014
Total number of anti-dilutive potential common shares	247	—	168	1