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LEASES (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
LEASES      
Lease, Practical Expedient, Use of Hindsight [true false] false    
Operating lease expense $ 5.0 $ 5.1 $ 4.5
Weighted-average remaining term 4 years 4 months 24 days    
Weighted-average discount rate 1.50%    
Minimum      
LEASES      
Lease term (in years) 2 years    
Maximum      
LEASES      
Lease term (in years) 5 years