Components of Net Periodic Benefit Cost of Defined Benefit Plans and Post-Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of actuarial loss	$ (35)	$ (24)	$ (70)	$ (49)
Settlement loss recognized	(37)		(64)
Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		12		24
Interest	100	124	200	248
Expected return on assets	(103)	(122)	(206)	(243)
Amortization of actuarial loss	34	24	68	49
Settlement loss recognized	37		37
Net expense	68	38	99	78
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	3	3	6	6
Interest	51	62	102	123
Amortization of actuarial loss	1		2
Settlement loss recognized			27
Net expense	$ 55	$ 65	$ 137	$ 129