Company's Interest Rate Swap Contract on Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Interest Expense
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	$ (42)	$ (45)	$ (121)	$ (395)
Interest Rate Swap
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of gain or (loss) recognized in AOCI on derivative	$ (49)	$ (354)	$ (117)	$ (108)