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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], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Oct. 31, 2012
Pension Plans, Defined Benefit [Member]
 
Pension Plans, Postretirement and Other Employee Benefits [Line Items]  
1-Percentage-Point, Effect on total of service and interest cost components $ 55
1-Percentage-Point, Effect on postretirement benefit obligation 664
1-Percentage-Point, Effect on total of service and interest cost components (47)
1-Percentage-Point, Effect on postretirement benefit obligation $ (553)