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Net Income per Share (Tables)
 3 Months Ended
Jan. 31, 2018
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 (loss) per share with the weighted-average common shares used to calculate diluted net income (loss) per share:
 
Three Months Ended 
 January 31,
 
2018
 
2017
 
(in thousands, except per share amounts)
Numerator:
 
 
 
Net income (loss)
$
(3,691
)
 
$
86,588

Denominator:
 
 
 
Weighted-average common shares for basic net income (loss) per share
149,441

 
150,782

Dilutive effect of potential common shares from equity-based compensation
—

 
3,651

Weighted-average common shares for diluted net income (loss) per share
149,441

 
154,433

Net income (loss) per share:
 
 
 
Basic
$
(0.02
)
 
$
0.57

Diluted
$
(0.02
)
 
$
0.56

Anti-dilutive employee stock-based awards excluded(1)
4,627

 
492


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