Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 3,453	$ 7,968
Additional liability recorded	5,864	5,941
Restructuring Reserve, Accrual Adjustment		(751)
Cash payments	(4,568)	(7,523)
Balance at end of period	4,749	5,635
Current restructuring liabilities	3,007	2,692	664
Non-current restructuring liabilities	1,742	2,943
Workforce reduction [Member]
Activity and balance of the restructuring liability accounts
Balance at beginning of period	160	1,576
Additional liability recorded	3,934	5,941
Restructuring Reserve, Accrual Adjustment		0
Cash payments	(3,262)	(5,800)
Balance at end of period	832	1,717
Current restructuring liabilities	832	1,717
Non-current restructuring liabilities	0	0
Consolidation of excess facilities [Member]
Activity and balance of the restructuring liability accounts
Balance at beginning of period	3,293	6,392
Additional liability recorded	1,930	0
Restructuring Reserve, Accrual Adjustment		(751)
Cash payments	(1,306)	(1,723)
Balance at end of period	3,917	3,918
Current restructuring liabilities	2,175	975
Non-current restructuring liabilities	$ 1,742	$ 2,943