Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Reconciliation of change in gross unrecognized tax benefits
Balance, beginning of period	$ 80,991	$ 104,669	$ 160,446
Increase in benefit as a result of tax positions taken in prior years	5,699	5,000	8,168
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions		5,489
Decrease in benefit as a result of resolution of uncertain tax positions			(17,954)
Decrease in benefit as a result of completion of tax audits		(1,782)	(33,370)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(8,585)	(32,385)	(12,621)
Balance, end of period	$ 78,105	$ 80,991	$ 104,669