Capital Shares - Capital Shares (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Equity [Abstract]
Number of Shares (in shares)	303	949	145
Total Amount	$ 38,138	$ 114,790	$ 18,939
Average per Share (in dollars per share)	$ 125.70	$ 121.01	$ 130.21