Earnings per Share and Stock-Based Compensation - Schedule of Changes in Shares under Option, Excluding Performance Based Options (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, October 31, 2013	8,829,618
Granted, Shares
Exercised, Shares	(568,290)
Canceled, Shares	(626,750)
Outstanding, January 31, 2014	7,634,578
Options exercisable, January 31, 2014	5,633,427
Outstanding, Weighted Average Price, beginning balance	$ 4.83
Granted, Weighted Average Price
Exercised, Weighted Average Price	$ 4.24
Canceled, Weighted Average Price	$ 8.59
Outstanding, Weighted Average Price, ending balance	$ 4.56
Options exercisable, Weighted Average Price, ending balance	$ 4.16
Outstanding, Weighted Average Life, ending balance	5 years 6 months
Options exercisable, Weighted Average Life, January 31, 2014	4 years 9 months 18 days
Exercised, Aggregate Intrinsic Value	$ 2,370
Outstanding, Aggregate Intrinsic Value, ending balance	21,110
Options exercisable, January 31, 2014, Aggregate Intrinsic Value	$ 18,344