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10. Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jul. 30, 2017
Jul. 31, 2016
Jul. 30, 2017
Jul. 31, 2016
Jan. 29, 2017
Income Tax Disclosure [Abstract]          
Income Tax Expense (Benefit) $ 4,234,000 $ 2,887,000 $ 6,568,000 $ 4,284,000  
Effective Income Tax Rate Reconciliation, Percent 35.20% 35.10% 34.40% 35.30%  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 205,000   $ 205,000   $ 201,000