Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Postretirement Benefit Plans, United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 212	$ 225	$ 637	$ 675
Interest cost	731	744	2,192	2,232
Amortization of prior service credit	(67)	(110)	(201)	(329)
Amortization of net actuarial (gain) loss	171	289	514	866
Total benefit cost	1,047	1,148	3,142	3,444
Postretirement Benefit Plans, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	7	12	22
Interest cost	5	9	17	27
Amortization of net actuarial (gain) loss	(6)		(18)
Total benefit cost	$ 3	$ 16	$ 11	$ 49