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Income Taxes: (Details)	3 Months Ended		6 Months Ended
Income Taxes: (Details)	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Income Tax Disclosure [Abstract]
Effective tax rate (as a percent)	40.70%	36.00%	43.20%	37.80%

- 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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