Stockholders' Equity - Schedule of Changes in Shares Under Options Excluding Performance Based Options (Detail) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, beg. of year	12,325,499	13,399,381	12,731,430
Granted	1,045,000	375,000	2,315,000
Exercised	(2,985,792)	(506,329)	(757,538)
Canceled/Forfeited	(1,555,089)	(942,553)	(889,511)
Outstanding, end of year	8,829,618	12,325,499	13,399,381
Exercisable, end of year	6,044,792	7,903,327	6,042,873
Outstanding, beg. of year	$ 4.49	$ 4.40	$ 4.48
Granted	$ 6.68	$ 3.66	$ 5.01
Exercised	$ 2.94	$ 2.23	$ 3.92
Canceled/Forfeited	$ 7.02	$ 4.08	$ 7.63
Outstanding, end of year	$ 4.83	$ 4.49	$ 4.40
Exercisable, end of year	$ 4.72	$ 4.94	$ 5.64