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Stock-Based Compensation Plans - Factors Related to the Company's Performance Share Awards (Details) - Performance share awards - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average per award fair value at date of grant (in dollars per share) $ 77.33 $ 59.58 $ 65.40
Fair value of restricted stock units vested $ 6,271 $ 6,300 $ 8,419