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, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 187	$ 70	$ 520	$ 401
Interest cost	657	698	1,830	2,195
Amortization of prior service credit	(5)	(6)	(13)	(20)
Amortization of net actuarial (gain) loss	380	162	1,057	467
Total benefit cost	1,219	924	3,394	3,043
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	3	11	13
Interest cost	3	3	10	15
Amortization of net actuarial (gain) loss	(9)	(5)	(27)	(22)
Total benefit cost	$ (2)	$ 1	$ (6)	$ 6