Share-Based Compensation Expense (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Summary of stock option activity
Shares Underlying Options Outstanding, Beginning Balance	5,002	5,538	6,399
Weighted Average Exercise Price, Beginning Balance (per share)	$ 40.96	$ 45.80	$ 48.84
Shares Underlying Options Outstanding, Granted	0	86	234
Weighted Average Exercise Price, Granted (per share)	$ 0.00	$ 12.42	$ 8.63
Shares Underlying Options Outstanding, Exercised	(411)	(103)	(107)
Weighted Average Exercise Price, Exercised (per share)	$ 14.88	$ 5.21	$ 2.33
Shares Underlying Options Outstanding, Canceled	(901)	(519)	(988)
Weighted Average Exercise Price, Canceled (per share)	$ 97.64	$ 95.00	$ 61.40
Shares Underlying Options Outstanding, Ending Balance	3,690	5,002	5,538
Weighted Average Exercise Price, Ending Balance (per share)	$ 30.01	$ 40.96	$ 45.80