Net Income Per Share

9 Months Ended

Sep. 30, 2015

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

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 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