Interest Rate Swap Contracts on Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of gain (loss) recognized in AOCL on derivative	$ 934	$ (7)	$ 528	$ 4
Interest Expense
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of loss reclassified from AOCL into income	149	42	292	121
Interest Rate Swap
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of gain (loss) recognized in AOCL on derivative	$ 785	$ (49)	$ 236	$ (117)