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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
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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

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