Share-Based Compensation Expense (Details 3) (Restricted Stock Units (RSUs), USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Restricted Stock Units (RSUs)
Summary of Restricted Stock Unit Activity
Restricted shares outstanding, Beginning Balance	4,298	5,191	3,716
Restricted Stock Units Outstanding, Granted	2,433	2,064	3,643
Restricted Stock Units Outstanding, Vested	(1,912)	(2,466)	(1,846)
Restricted Stock Units Outstanding, Canceled or forfeited	(416)	(491)	(322)
Restricted shares outstanding, Ending Balance	4,403	4,298	5,191
Weighted Average Grant Date Fair Value Per Share	$ 14.16	$ 16.28	$ 13.81	$ 14.67
Aggregate Fair Value	$ 56,267	$ 59,399	$ 71,681	$ 43,591