Earnings per Share and Stock-Based Compensation - Schedule of Changes in Non-Vested Shares under Option, Excluding Performance Based Options (Detail) (Non-Performance Based Options [Member], USD $)	9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Non-Performance Based Options [Member]
Shares
Non-vested, beginning balance	2,784,826
Granted	275,000
Vested	(1,651,824)
Canceled	(105,000)
Non-vested, ending balance	1,303,002
Weighted Average Grant Date Fair Value
Non-vested, beginning balance, Weighted-Average Grant Date Fair Value	$ 2.95
Granted, Weighted-Average Grant Date Fair Value	$ 5.82	$ 4.77
Vested, Weighted-Average Grant Date Fair Value	$ 2.24
Canceled, Weighted-Average Grant Date Fair Value	$ 4.71
Non-vested, ending balance, Weighted-Average Grant Date Fair Value	$ 4.28