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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 27, 2014	Apr. 28, 2013
Income Taxes
Income tax expense	$ 26,766	$ 10,171
Effective Income Tax Rate, Continuing Operations	16.40%	11.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Annual projected effective tax rate as of the first three months of fiscal year 2015	20.00%

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 domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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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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