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Post Retirement Benefit Plans - Effect of One-Percentage Point Change In Assumed Health Care Cost Trend Rates (Detail) - Pension Plans, Defined Benefit [Member]
$ in Thousands
12 Months Ended
Oct. 31, 2015
USD ($)
Pension Plans, Postretirement and Other Employee Benefits [Line Items]  
1-Percentage-Point, Effect on total of service and interest cost components $ 34
1-Percentage-Point, Effect on postretirement benefit obligation 361
1-Percentage-Point, Effect on total of service and interest cost components (29)
1-Percentage-Point, Effect on postretirement benefit obligation $ (309)