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Net Income per Share (Tables)
 6 Months Ended
Apr. 30, 2017
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,
 
2017
 
2016
 
2017
 
2016
 
(in thousands, except per share amounts)
Numerator:
 
 
 
 
 
 
 
Net income
$
53,306

 
$
69,376

 
$
139,894

 
$
129,411

Denominator:
 
 
 
 
 
 
 
Weighted-average common shares for basic net income per share
150,384

 
152,250

 
150,583

 
152,609

Dilutive effect of potential common shares from equity-based compensation
4,477

 
2,286

 
4,171

 
2,312

Weighted-average common shares for diluted net income per share
154,861

 
154,536

 
154,754

 
154,921

Net income per share:
 
 
 
 
 
 
 
Basic
$
0.35

 
$
0.46

 
$
0.93

 
$
0.85

Diluted
$
0.34

 
$
0.45

 
$
0.90

 
$
0.84

Anti-dilutive employee stock-based awards excluded(1)
948

 
2,886

 
738

 
2,649


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