Retirement, Pension and Other Postretirement Plans - Changes in Level 3 plan assets (Detail) - Level 3 - Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	$ 21,245	$ 21,645
Assets held, end of year	1,739	913
Assets sold during the period	0	0
Purchases	2,462	2,431
Sales	(1,495)	(4,102)
Foreign currency translation	545	358
Ending balance	24,496	21,245
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Beginning balance	21,245	21,645
Assets held, end of year	1,739	913
Assets sold during the period	0	0
Purchases	2,462	2,431
Sales	(1,495)	(4,102)
Foreign currency translation	545	358
Ending balance	$ 24,496	$ 21,245