Note 11. Net Income per Share

The Company computes basic net income per share by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net income per share reflects the dilution of potential common shares outstanding such as stock options and unvested restricted stock units and awards during the period using the treasury stock method.

The table below reconciles the weighted-average common shares used to calculate basic net income per share with the weighted-average common shares used to calculate diluted net income per share.


	Three Months Ended April 30,				Six Months Ended April 30,
	2011		2010		2011		2010
	(in thousands)
Numerator:
Net income	$	81,114	$	39,549	$	129,340	$	172,335
Denominator:
Weighted-average common shares for basic net income per share		148,461		148,890		148,738		147,860
Dilutive effect of common share equivalents from equity-based compensation		4,132		3,592		4,460		3,775

Weighted-average common shares for diluted net income per share		152,593		152,482		153,198		151,635

Net income per share:
Basic	$	0.55	$	0.27	$	0.87	$	1.17
Diluted	$	0.53	$	0.26	$	0.84	$	1.14

Diluted net income per share excludes 2.5 million and 3.3 million of anti-dilutive stock options and unvested restricted stock units and awards for the three and six months ended April 30, 2011, respectively and 10.7 million of anti-dilutive stock options and unvested restricted stock units and awards for the three and six months ended April 30, 2010, respectively. While these stock options and unvested restricted stock units and awards were anti-dilutive for the respective periods, they could be dilutive in the future.