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Net Income per Share (Tables)
 6 Months Ended
Apr. 30, 2015
Earnings Per Share [Abstract]  
Reconciliation of Weighted-Average Common Shares Used to Calculate Net Income Per Share
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,
 
2015
 
2014
 
2015
 
2014
 
(in thousands)
Numerator:
 
 
 
 
 
 
 
Net income
$
55,596

 
$
63,317

 
$
120,785

 
$
131,013

Denominator:
 
 
 
 
 
 
 
Weighted-average common shares for basic net income per share
154,515

 
154,572

 
154,486

 
154,319

Dilutive effect of potential common shares from equity-based compensation
2,968

 
2,510

 
2,923

 
2,667

Weighted-average common shares for diluted net income per share
157,483

 
157,082

 
157,409

 
156,986

Net income per share:
 
 
 
 
 
 
 
Basic
$
0.36

 
$
0.41

 
$
0.78

 
$
0.85

Diluted
$
0.35

 
$
0.40

 
$
0.77

 
$
0.83

Anti-dilutive employee stock-based awards excluded(1)
1,190

 
1,998

 
1,859

 
1,674


(1)
These stock options and unvested restricted stock units and restricted stock awards were anti-dilutive for the respective periods and are excluded in calculating diluted net income per share. While such awards were antidilutive for the respective periods, they could be dilutive in the future.