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Stock Repurchase Program (Tables)
 12 Months Ended
Oct. 31, 2016
Stock Repurchase Program [Abstract]  
Stock Repurchase And Reissuance Activities
The following table summarizes stock repurchase activities as well as the reissuance of treasury stock for employee stock compensation purposes:
 
Year Ended October 31,
 
2016
 
2015
 
2014
 
(in thousands, except per share price)
Shares repurchased
8,506

 
5,672

 
3,092

Average purchase price per share
$
49.37

 
$
45.84

 
$
38.72

Aggregate purchase price
$
420,000

 
$
260,000

 
$
119,747

Reissuance of treasury stock
4,803

 
4,864

 
4,888