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Gain from Sale of Office Premises (Details) (USD $)	3 Months Ended
Gain from Sale of Office Premises (Details) (USD $)	Apr. 28, 2012	Apr. 30, 2011
Gain (Loss) on Sale of Property Plant Equipment [Abstract]
Gross proceeds from sale of office premises		$ 7,512,000
Gain from sale of office premises	$ 0	$ 5,185,000

The gains (losses) included in results of operations resulting from the sale or disposal of property, plant and equipment, which do not qualify for treatment as discontinued operations. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property.

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- Definition

The cash inflow from sale of other property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

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