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Stockholders' Equity (Tables)
 12 Months Ended
Oct. 31, 2018
Stock Repurchase Program [Abstract]  
Stock repurchase program
The following table provides information about the share repurchase programs for the fiscal years ended October 31, 2018, 2017, and 2016:
 
2018
 
2017
 
2016
Number of shares purchased (in thousands)
12,108

 
7,694

 
13,652

Average price per share
$
41.56

 
$
37.81

 
$
28.77

Remaining authorization at October 31 (in thousands)
10,989

 
8,144

 
15,838