Share-Based Compensation Expense (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Share-based compensation expense
Share-based compensation expense capitalized in inventory, net	$ (24)	$ 62	$ (24)	$ (10)
Total share-based compensation	9,827	7,942	18,147	16,830
Cost of Sales [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	1,121	827	2,109	1,749
Product costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	686	460	1,247	944
Service costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	435	367	862	805
Operating Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	8,730	7,053	16,062	15,091
Research and Development Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	2,204	2,092	4,237	4,226
Selling and marketing expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	3,382	2,820	6,125	5,921
General and Administrative Expense [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	3,144	2,141	5,700	4,938
Acquisition and Integration Costs [Member]
Share-based compensation expense
Allocated Share-based Compensation Expense	$ 0	$ 0	$ 0	$ 6