Inventories (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Inventories
Raw materials	$ 40,012		$ 45,333
Work-in-process	12,542		13,851
Finished goods	163,414		134,998
Deferred cost of goods sold	64,478		67,665
Inventories before provision	280,446		261,847
Provision for excess and obsolescence	(37,722)		(31,771)
Total inventories	242,724		230,076
Provisions	$ 13,982	$ 6,413