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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Income Taxes        
Income tax benefits $ 4,245 $ 5,226 $ 1,835 $ 3,683
Estimated annual effective tax rate 39.30% 38.60% 47.30% 29.90%
Federal statutory rate     35.00%