Company's Interest Rate Swap Contract on Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Interest Expense
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of loss reclassified from AOCI into income	$ 43	$ 39
Interest Rate Swap
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amount of loss recognized in AOCI on derivative	$ 4	$ 67