Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Unrealized gain (loss) on auction rate securities, tax effect	$ 866	$ 193	$ 179
Reclassification adjustment for credit losses recognized in earnings, tax effect	126		53
Net unrealized gain on interest rate swaps, tax effect	16	76
Actuarial gain (loss) - Adjustments to pension and other post-retirement benefit plans, tax effect	594	996	108
Unrealized gain (loss) on interest rate swaps, tax effect			230
Accumulated Other Comprehensive Income (Loss)
Actuarial gain (loss) - Adjustments to pension and other post-retirement benefit plans, tax effect	$ 594	$ 996	$ 108