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Other Assets and Intangibles - Amortization (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 1.1 $ 0.7 $ 1.1
Amortization expense for 2021 1.6    
Amortization expense for 2022 1.6    
Amortization expense for 2023 1.5    
Amortization expense for 2024 1.5    
Amortization expense thereafter $ 4.1