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. 31, 2020	Aug. 01, 2020	May 02, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Oct. 31, 2020	Nov. 02, 2019
Numerator:
Net income (loss)	$ 20,425	$ 29,581	$ (50,582)	$ 10,189	$ 28,831	$ 25,662	$ (576)	$ 64,682
Denominator:
Weighted-average common shares outstanding - basic (shares)	55,851,780			55,672,796			56,004,072	55,855,526
Dilutive impact of options and warrants (shares)	247,548			346,940			0	353,192
Weighted average common share outstanding - diluted (shares)	56,099,328			56,019,736			56,004,072	56,208,718
Per common share:
Basic income (loss) per common share (dollars per share)	$ 0.37			$ 0.18			$ (0.01)	$ 1.16
Diluted income (loss) per common share (dollars per share)	$ 0.36			$ 0.18			$ (0.01)	$ 1.15