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Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Basic Net Income per Share:        
Net income $ 14,678 $ 13,726 $ 8,548 $ 39,431
Conversion of stock-based compensation arrangements 0 (12) 0 (66)
Net income available for basic common shares and basic net income per share $ 14,678 $ 13,714 $ 8,548 $ 39,365
Basic 14,090 14,404 14,057 14,544
Basic $ 1.04 $ 0.95 $ 0.61 $ 2.71
Diluted Net Income per Share:        
Net income/(loss) $ 14,678 $ 13,726 $ 8,548 $ 39,431
Conversion of stock-based compensation arrangements 0 (12) 0 (65)
Net income available for diluted common shares and diluted net income per share $ 14,678 $ 13,714 $ 8,548 $ 39,366
Conversion of stock-based compensation arrangements 176 152 168 282
Net income available for diluted common shares and diluted net income per share 14,266 14,556 14,225 14,826
Diluted $ 1.03 $ 0.94 $ 0.60 $ 2.66