Restructuring Charges - Activity and Liability Balances (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Jul. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 12,191	$ 7,308
Charged to expense	17,431	13,602	8,038
Cash payments	(14,258)	(8,719)	(730)
Adjustments to accrual	(553)
Ending Balance	14,811	12,191	7,308
Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5,335	1,076
Charged to expense	15,801	9,721	1,389
Cash payments	(10,101)	(5,462)	(313)
Ending Balance	11,035	5,335	1,076
Facility & Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	6,856	6,232
Charged to expense	1,630	3,881	6,649
Cash payments	(4,157)	(3,257)	(417)
Adjustments to accrual	(553)
Ending Balance	$ 3,776	$ 6,856	$ 6,232