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Summary Of Significant Accounting Policies (Schedule Of Property And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2011
Oct. 31, 2010
Summary Of Significant Accounting Policies [Abstract]    
Computer and other equipment $ 283,893 $ 255,054
Buildings 53,926 55,447
Furniture and fixtures 28,759 27,639
Land 20,414 20,414
Leasehold improvements 85,984 87,405
Property and equipment, gross 472,976 445,959
Less accumulated depreciation and amortization (313,459) [1] (297,379) [1]
Total $ 159,517 $ 148,580
[1] Change in accumulated depreciation and amortization is due to additional year of expense offset partially by retirement of fully amortized fixed assets.