Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Postretirement Benefit Plans, United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 221	$ 248
Interest cost	587	765
Amortization of prior service credit	(41)	(66)
Amortization of net actuarial (gain) loss	229	212
Total benefit cost	996	1,159
Postretirement Benefit Plans, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	4
Interest cost	5	6
Amortization of net actuarial (gain) loss	(4)	(6)
Total benefit cost	$ 6	$ 4