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, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Segment Reporting [Abstract]
Total profit for reportable segments	$ 135,576	$ 153,466	$ 380,004	$ 332,914
Interest expense	(13,765)	(11,306)	(37,210)	(24,854)
Interest and investment income	356	268	865	813
Other - net	528	27	673	(1,452)
Income before income taxes	$ 122,695	$ 142,455	$ 344,332	$ 307,421