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Segment Information (Summary Of Property And Equipment By Major Country) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	Nov. 30, 2010
Segment Reporting Information [Line Items]
Property and equipment, net	$ 89,871	$ 88,523
United States [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	83,500	83,931
United Kingdom [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	1,386	1,724
Other [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	$ 4,985	$ 2,868

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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