Prepaid Expenses and Other (Details) (USD $)	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Prepaid expenses and other
Prepaid VAT and other taxes	$ 35,320,000		$ 44,969,000
Deferred deployment expense	15,586,000		17,839,000
Product demonstration equipment, net	32,552,000		46,996,000
Prepaid expenses	15,115,000		14,769,000
Restricted cash	7,974,000		12,533,000
Other non-trade receivables	12,492,000		6,251,000
Prepaid expenses and other	119,039,000		143,357,000
Depreciation of product demonstration equipment	$ 6,000,000	$ 7,100,000