Significant Accounting Policies - Revenues in Consolidated Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Accounting Policies [Abstract]
Product sales, net									$ 1,559,174	$ 1,801,355	$ 1,929,086
Royalty and licensing income									11,225	9,215	12,763
Total	$ 400,650	$ 380,016	$ 397,121	$ 392,612	$ 475,913	$ 475,164	$ 447,304	$ 412,189	$ 1,570,399	$ 1,810,570	$ 1,941,849