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Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - Postretirement Benefit Costs [Member] - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Jul. 31, 2018
United States [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 70 $ 172 $ 401 $ 528
Interest cost 698 627 2,195 1,922
Amortization of prior service credit (6) (24) (20) (74)
Amortization of net actuarial (gain) loss 162 264 467 809
Total benefit cost 924 1,039 3,043 3,185
International [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 3 5 13 15
Interest cost 3 5 15 15
Amortization of net actuarial (gain) loss (5) (5) (22) (15)
Total benefit cost $ 1 $ 5 $ 6 $ 15