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Stock Repurchase Program and Cash Dividend (Tables)
6 Months Ended
Apr. 30, 2020
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,
 2020201920202019
Number of shares purchased (in thousands)15,938  788  4,252   
Average price per share$39.75  $32.04  $37.05  $36.95  
Remaining authorization at April 30 (in thousands)19,998  19,784  19,998  19,784