Property and Equipment (Schedule Of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012	Nov. 30, 2011
Property, Plant and Equipment [Abstract]
Buildings	$ 77,938	$ 77,938
Equipment and software	64,956	58,021
Furniture and fixtures	8,475	6,923
Facility improvements	58,118	51,016
Property and equipment, gross	209,487	193,898
Less: Accumulated depreciation	(111,013)	(104,027)
Property and equipment, net	$ 98,474	$ 89,871

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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