Components of Net Periodic Benefit Cost of Defined Benefit Plans and Post-Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 46	$ 44	$ 42
Interest	569	592	811
Expected return on assets	(373)	(399)	(321)
Amortization of actuarial gain	114	66	115
Settlement loss recognized	126	91	349
Net expense	482	394	996
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	13	15	12
Interest	256	281	276
Amortization of actuarial gain			(202)
Net expense	$ 269	$ 296	$ 86