Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Postretirement Benefit Plans, United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 248	$ 275
Interest cost	765	753
Amortization of prior service credit	(66)	(110)
Amortization of net actuarial (gain) loss	212	297
Total benefit cost	1,159	1,215
Postretirement Benefit Plans, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	8
Interest cost	6	9
Amortization of net actuarial (gain) loss	(6)
Total benefit cost	$ 4	$ 17