Inventories (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Oct. 31, 2014
Inventories
Raw materials	$ 54,112		$ 64,853
Work-in-process	8,924		8,371
Finished goods	119,635		165,799
Deferred cost of goods sold	59,606		75,763
Inventories before provision	242,277		314,786
Provision for excess and obsolescence	(48,260)		(60,126)
Total inventories	194,017		$ 254,660
Provisions	$ 18,010	$ 22,026