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Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012
Income Taxes (Textual) [Abstract]
Income tax expense	$ 14,899,000	$ 12,802,000	$ 37,539,000	$ 25,595,000
Income tax expense, percentage	35.20%	33.90%	35.70%	31.00%
Increase in the accrual for uncertain tax positions	700,000		2,300,000
Reserve for uncertain tax positions	6,500,000		6,500,000
Overall reserve	$ 16,700,000		$ 16,700,000		$ 22,000,000

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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