Prepaid Expenses and Other (Details) (USD $) In Thousands	Jul. 31, 2011	Oct. 31, 2010
Prepaid expenses and other
Prepaid VAT and other taxes	$ 37,295	$ 46,352
Deferred deployment expense	13,779	6,918
Product demonstration equipment, net	45,048	29,449
Prepaid expenses	13,537	15,087
Restricted cash	21,566	12,994
Contingent consideration		30,195
Other non-trade receivables	10,176	6,685
Prepaid expenses and other	$ 141,401	$ 147,680