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Common Stock Repurchases (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Equity, Class of Treasury Stock [Line Items]      
Purchase of common stock (in shares) 0 0 823,385
Average cost (in usd per share)     $ 101.37
Purchase of common stock     $ 83,463
Paid-In Capital      
Equity, Class of Treasury Stock [Line Items]      
Purchase of common stock     59,639
Retained Earnings      
Equity, Class of Treasury Stock [Line Items]      
Purchase of common stock     $ 23,001