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Components of Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jan. 31, 2012
Jan. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Net income $ 10,630 $ 8,390
Other comprehensive income (loss):    
Unrealized (losses) gains on auction rate securities 2,477 739
Unrealized (losses) gains on interest rate swap agreements (28) 624
Foreign currency translation (101) 148
Actuarial gains - adjustments to pension and other post-retirement plans 24 17
Income tax benefit (expense) related to other comprehensive income (loss) (1,013) (562)
Comprehensive income $ 11,989 $ 9,356