Inventories (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Inventories
Raw materials	$ 37,976		$ 45,333
Work-in-process	12,622		13,851
Finished goods	185,679		134,998
Deferred cost of goods sold	46,113		67,665
Inventories before provision	282,390		261,847
Provision for excess and obsolescence	(37,347)		(31,771)
Total inventories	245,043		230,076
Provisions	$ 19,071	$ 11,461