Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - 9 months ended Jul. 31, 2015 - Directors [Member] - Deferred Compensation Share Equivalent Units [Member] - $ / shares shares in Thousands	Total
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	(20)
Number of Shares, Outstanding, Ending balance	96
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	76.31
Weighted-Average Grant Date Fair Value Per Share, Distributions	21.46
Weighted-Average Grant Date Fair Value Per Share, Ending balance	$ 33.72