Capital Shares - Capital Shares (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Equity [Abstract]
Number of Shares	447	5,360	2,224
Total Amount	$ 31,877	$ 381,598	$ 163,584
Average per Share	$ 71.37	$ 71.19	$ 73.55