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, 2011	Oct. 31, 2010	Oct. 31, 2009
Restricted Stock Units (RSUs)
Summary of Restricted Stock Unit Activity
Restricted shares outstanding, Beginning Balance	5,191	3,716	1,849
Weighted Average Grant Date Fair Value Per Share, Beginning of Period	$ 13.81	$ 14.67	$ 30.85
Aggregate Intrinsic Value, Beginning of Period	$ 71,681	$ 43,591	$ 17,773
Restricted Stock Units Outstanding, Granted	2,064	3,643	3,364
Restricted Stock Units Outstanding, Vested	(2,466)	(1,846)	(1,358)
Restricted Stock Units Outstanding, Canceled or forfeited	(491)	(322)	(139)
Restricted shares outstanding, Ending Balance	4,298	5,191	3,716
Weighted Average Grant Date Fair Value Per Share, Ending Balance	$ 16.28	$ 13.81	$ 14.67
Aggregate Intrinsic Value, Ending Balance	$ 59,399	$ 71,681	$ 43,591