Note 6 - Share-Based Compensation (Detail) - Summary of Stock Option Activity (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Oct. 31, 2012
Shares	2,926		3,010
Weighted Average Exercise Price (in Dollars per share)	$ 13.69		$ 14.68
Weighted Average Remaining Contractual Term	6 years 36 days
Aggregate Intrinsic Value (in Dollars)	$ 13,117
Fully vested and expected to vest at April 30, 2013	2,878
Fully vested and expected to vest at April 30, 2013 (in Dollars per share)	$ 13.71
Fully vested and expected to vest at April 30, 2013	6 years
Fully vested and expected to vest at April 30, 2013 (in Dollars)	12,973
Exercisable at April 30, 2013	1,786
Exercisable at April 30, 2013 (in Dollars per share)	$ 14.83
Exercisable at April 30, 2013	4 years 146 days
Exercisable at April 30, 2013 (in Dollars)	$ 8,683
Granted	532
Granted (in Dollars per share)	$ 13.18
Exercised	(257)	(1,300)
Exercised (in Dollars per share)	$ 7.91
Forfeited	(22)
Forfeited (in Dollars per share)	$ 12.18
Expired	(337)
Expired (in Dollars per share)	$ 26.23