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Stock Repurchase Program and Cash Dividend (Tables)
 9 Months Ended
Jul. 31, 2017
Stock Repurchase Program [Abstract]  
Stock repurchase program
The table below provides, for the periods indicated, information about our share repurchase programs:
 
Nine months ended July 31,
 
Three months ended July 31,
 
2017
 
2016
 
2017
 
2016
Number of shares purchased (in thousands)
2,492

 
11,405

 
1,929

 
3,698

Average price per share
$
36.40

 
$
28.72

 
$
39.02

 
$
26.33

Remaining authorization at July 31 (in thousands)
13,347

 
18,085

 
13,347

 
18,085