Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2012
Activity and balance of the restructuring liability accounts
Balance at beginning of period			$ 5,049	$ 3,453
Additional liability recorded	202	2,291	6,741	5,864
Non-cash disposal			(747)
Cash payments			(9,106)	(4,568)
Balance at end of period	1,937	4,749	1,937	4,749
Current restructuring liabilities	798	3,007	798	3,007	3,516
Non-current restructuring liabilities	1,139	1,742	1,139	1,742
Workforce reduction [Member]
Activity and balance of the restructuring liability accounts
Balance at beginning of period			1,449	160
Additional liability recorded			5,003	3,934
Non-cash disposal			0
Cash payments			(6,107)	(3,262)
Balance at end of period	345	832	345	832
Current restructuring liabilities	345	832	345	832
Non-current restructuring liabilities	0	0	0	0
Consolidation of excess facilities [Member]
Activity and balance of the restructuring liability accounts
Balance at beginning of period			3,600	3,293
Additional liability recorded			1,738	1,930
Non-cash disposal			(747)
Cash payments			(2,999)	(1,306)
Balance at end of period	1,592	3,917	1,592	3,917
Current restructuring liabilities	453	2,175	453	2,175
Non-current restructuring liabilities	$ 1,139	$ 1,742	$ 1,139	$ 1,742