Share-Based Compensation Expense (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Share-based compensation expense
Share-based compensation expense capitalized in inventory, net	$ 0	$ (72)
Total share-based compensation	8,320	8,888
Cost of Sales [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	988	922
Product costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	561	485
Service costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	427	437
Operating Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	7,332	8,038
Research and Development Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	2,033	2,134
Selling and marketing expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	2,743	3,101
General and Administrative Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	2,556	2,797
Acquisition and Integration Costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	$ 0	$ 6