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Income Per Common Share (Computations Of Basic And Diluted Income (Loss) Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Oct. 30, 2021
Jul. 31, 2021
May 01, 2021
Oct. 31, 2020
Aug. 01, 2020
May 02, 2020
Oct. 30, 2021
Oct. 31, 2020
Numerator:                
Net income (loss) $ 24,177 $ 64,841 $ 49,596 $ 20,425 $ 29,581 $ (50,582) $ 138,614 $ (576)
Denominator:                
Weighted-average common shares outstanding - basic (shares) 56,023,961     55,851,780     56,001,437 56,004,072
Dilutive impact of options and warrants (shares) 316,674     247,548     304,019 0
Weighted average common share outstanding - diluted (shares) 56,340,635     56,099,328     56,305,456 56,004,072
Per common share:                
Basic income (loss) per common share (dollars per share) $ 0.43     $ 0.37     $ 2.48 $ (0.01)
Diluted income (loss) per common share (dollars per share) $ 0.43     $ 0.36     $ 2.46 $ (0.01)