Share-Based Compensation Expense (Details) (USD $) In Thousands, except Per Share data	9 Months Ended
	Jul. 31, 2011
Summary of stock option activity
Shares Underlying Options Outstanding, Beginning Balance	5,002
Weighted Average Exercise Price, Beginning Balance	$ 40.96
Shares Underlying Options Outstanding, Granted	0
Weighted Average Exercise Price, Granted	$ 0.00
Shares Underlying Options Outstanding, Exercised	(405)
Weighted Average Exercise Price, Exercised	$ 15.03
Shares Underlying Options Outstanding, Canceled	(442)
Weighted Average Exercise Price, Canceled	$ 87.94
Shares Underlying Options Outstanding, Ending Balance,	4,155
Weighted Average Exercise Price, Ending Balance	$ 38.49