Components of Net Periodic Benefit Cost of Defined Benefit Plans and Post-Retirement Benefit Plans (Detail) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 12	$ 11	$ 35	$ 33
Interest	142	148	427	444
Expected return on plan assets	(93)	(99)	(280)	(299)
Amortization of actuarial loss	29	17	86	53
Net expense	90	77	268	231
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	3	3	10	11
Interest	64	71	192	211
Net expense	$ 67	$ 74	$ 202	$ 222