Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) (Directors [Member], Deferred Compensation Share Equivalent Units [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Apr. 30, 2015
Directors [Member] | Deferred Compensation Share Equivalent Units [Member]
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance	110
Number of Shares, Restricted share units vested	5
Number of Shares, Dividend equivalents	1
Number of Shares, Distributions	(15)
Number of Shares, Outstanding, Ending balance	101
Weighted-Average Grant Date Fair Value Per Share, Beginning balance	$ 29.74
Weighted-Average Grant Date Fair Value Per Share, Restricted share units vested	$ 61.59
Weighted-Average Grant Date Fair Value Per Share, Dividend equivalents	$ 74.21
Weighted-Average Grant Date Fair Value Per Share, Distributions	$ 21.35
Weighted-Average Grant Date Fair Value Per Share, Ending balance	$ 32.91