Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2012		Oct. 31, 2011
Property plant and equipment
Computer and other equipment	$ 329,376		$ 283,893
Buildings	70,237		53,926
Furniture and fixtures	29,212		28,759
Land	20,414		20,414
Leasehold improvements	92,111		85,984
Property, Plant and Equipment, Gross, Total	541,350		472,976
Less accumulated depreciation and amortization	(350,107)	[1]	(313,459)	[1]
Total	$ 191,243		$ 159,517

[1] Accumulated depreciation and amortization includes write-off's due to retirement of fully amortized fixed assets.