Share-Based Compensation Expense (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Share-based compensation expense
Share-based compensation expense capitalized in inventory, net	$ (48)	$ (152)	$ (58)	$ (28)
Total share-based compensation	6,825	9,033	23,656	27,919
Cost of Sales [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	896	1,090	2,645	3,174
Product costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	564	579	1,509	1,658
Service costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	332	511	1,136	1,516
Operating Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	5,977	8,095	21,069	24,773
Research and Development Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	1,841	2,423	6,067	7,591
Selling and marketing expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	2,589	2,736	8,510	8,871
General and Administrative Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	1,547	2,882	6,485	8,023
Acquisition and Integration Costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	$ 0	$ 54	$ 7	$ 288