Share-Based Compensation Expense (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Apr. 30, 2014
Summary of stock option activity [Roll Forward]
Shares Underlying Options Outstanding, Beginning Balance (in shares)	2,102
Shares Underlying Options Outstanding, Exercised (in shares)	(108)
Shares Underlying Options Outstanding, Canceled (in shares)	(379)
Shares Underlying Options Outstanding, Ending Balance (in shares)	1,615
Weighted average exercise price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 27.46
Weighted Average Exercise Price, Exercised (in dollars per share)	$ 17.82
Weighted Average Exercise Price, Canceled (in dollars per share)	$ 42.39
Weighted Average Exercise Price, Ending Balance (in dollars per share)	$ 24.60