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Net Income/(Loss) Per Share (Schedule of Net Income/(Loss) Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Basic Net Income/(Loss) per Share:        
Net income/(loss) available for basic common shares and basic net income/(loss) per share $ 44,212 $ 10,060 $ 87,454 $ (6,130)
Basic 28,323 28,175 28,290 28,080
Basic $ 1.56 $ 0.36 $ 3.09 $ (0.22)
Diluted Net Income/(Loss) per Share:        
Net income/(loss) $ 44,212 $ 10,060 $ 87,454 $ (6,130)
Conversion of share-based compensation arrangements 0 0 0 0
Net income/(loss) available for diluted common shares and diluted net income/(loss) per share $ 44,212 $ 10,060 $ 87,454 $ (6,130)
Conversion of share-based compensation arrangements 329 254 353 0
Net income/(loss) available for diluted common shares and diluted net income/(loss) per share 28,652 28,429 28,643 28,080
Diluted $ 1.54 $ 0.35 $ 3.05 $ (0.22)