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, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 180	$ 188	$ 553	$ 563
Interest cost	619	576	1,897	1,728
Amortization of prior service cost (credit)	(24)	(41)	(74)	(123)
Amortization of net actuarial (gain) loss	264	217	809	651
Total benefit cost	1,039	940	3,185	2,819
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	5	15	15
Interest cost	5	5	15	15
Amortization of net actuarial (gain) loss	(5)	(4)	(15)	(13)
Total benefit cost	$ 5	$ 6	$ 15	$ 17