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Stock Repurchase Program and Cash Dividend (Tables)
 6 Months Ended
Apr. 30, 2017
Stock Repurchase Program [Abstract]  
Stock repurchase program
The table below provides, for the periods indicated, information about our share repurchase programs:
 
Six months ended April 30,
 
Three months ended April 30,
 
2017
 
2016
 
2017
 
2016
Number of shares purchased (in thousands)
563

 
7,707

 
5

 
2,938

Average price per share
$
27.41

 
$
29.88

 
$
35.57

 
$
27.27

Remaining authorization at April 30 (in thousands)
15,276

 
10,827

 
15,276

 
10,827