Income Per Common Share (Computations Of Basic And Diluted Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jul. 31, 2021	May 01, 2021	Aug. 01, 2020	May 02, 2020	Jul. 31, 2021	Aug. 01, 2020
Numerator:
Net income (loss)	$ 64,841	$ 49,596	$ 29,581	$ (50,582)	$ 114,437	$ (21,001)
Denominator:
Weighted-average common shares outstanding - basic (shares)	56,007,970		55,786,823		55,989,399	55,844,418
Dilutive impact of options and warrants (shares)	291,521		180,017		297,696	0
Weighted average common share outstanding - diluted (shares)	56,299,491		55,966,840		56,287,095	55,844,418
Per common share:
Basic income (loss) per common share (dollars per share)	$ 1.16		$ 0.53		$ 2.04	$ (0.38)
Diluted income (loss) per common share (dollars per share)	$ 1.15		$ 0.53		$ 2.03	$ (0.38)