Property, Plant, and Equipment, Net Summary Of Property, Plant, And Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Property, Plant and Equipment [Line Items]
Computer Equipment And Furniture Gross	$ 308,229	$ 284,191
Buildings and building equipment	97,989	85,704
Land and improvements	21,345	21,179
Leasehold improvements	35,753	36,998
Property, Plant and Equipment, Gross	463,316	428,072
Less accumulated depreciation and amortization	(300,914)	(280,053)
Property, plant, and equipment, net	$ 162,402	$ 148,019

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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