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Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - Postretirement Benefit Costs [Member] - USD ($)
$ in Thousands
 3 Months Ended
Jan. 31, 2019
Jan. 31, 2018
United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 165 $ 212
Interest cost 749 637
Amortization of prior service credit (6) (25)
Amortization of net actuarial (gain) loss 152 249
Total benefit cost 1,060 1,073
International [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 4 5
Interest cost 5 5
Amortization of net actuarial (gain) loss (7) (5)
Total benefit cost $ 2 $ 5