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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 27, 2013
Oct. 28, 2012
Oct. 27, 2013
Oct. 28, 2012
Income Taxes        
Income tax expense $ 22,750 $ 44,548 $ 48,293 $ 87,368
Effective Income Tax Rate, Continuing Operations 16.10% 17.60% 14.20% 18.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate     35.00%