Summary Of Significant Accounting Policies (Useful Lives Of Depreciable Assets) (Details)	12 Months Ended
	Oct. 31, 2011 years
Computer And Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, minimum	3
Useful lives of depreciable assets, maximum	5
Buildings [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets	30
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets	5
Leasehold Improvements (Average) [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets	5