Operating Segments - Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Segment Reporting [Abstract]
Total profit for reportable segments	$ 123,686	$ 102,850	$ 277,568	$ 242,082
Interest expense	(4,647)	(4,504)	(15,490)	(12,907)
Interest and investment income	176	111	501	349
Other - net	(1,978)	2	551	(787)
Income before income taxes	$ 117,237	$ 98,459	$ 263,130	$ 228,737