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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Income Taxes        
Income tax benefits $ 6,218 $ 6,630 $ 8,053 $ 10,313
Estimated annual effective tax rate 38.80% 38.60% 40.50% 35.00%
Federal statutory rate     35.00%