Activity in Restructuring Accrual (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Oct. 31, 2012
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	$ 1,751	$ 1,724
Restructuring charges	4,838	1,483
Restructuring adjustments	(40)	(13)
Cash paid	(1,900)	(1,300)
Non-cash adjustments	22	5
Reclassification of restructuring charges of discontinued operations	(145)
Accrued restructuring, ending balance	4,575	1,751
Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring charges	146	9
Cash paid	(97)	(157)
Employee Related Costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	1,017	626
Restructuring charges	4,838	1,483
Restructuring adjustments	(34)	32
Cash paid	(1,587)	(991)
Non-cash adjustments	22	15
Reclassification of restructuring charges of discontinued operations	(130)
Accrued restructuring, ending balance	4,160	1,017
Employee Related Costs | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring charges	34	9
Cash paid		(157)
Contractual Obligations
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance	734	1,098
Restructuring adjustments	(6)	(45)
Cash paid	(313)	(309)
Non-cash adjustments		(10)
Reclassification of restructuring charges of discontinued operations	(15)
Accrued restructuring, ending balance	415	734
Contractual Obligations | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring charges	112
Cash paid	$ (97)