Income Per Common Share (Computations Of Basic And Diluted Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Numerator:
Net income	$ 110,374	$ 10,189	$ 28,831	$ 25,662	$ 89,262	$ 13,516	$ 25,063	$ 21,804	$ 175,056	$ 149,645	$ 102,451
Denominator:
Weighted-average common shares outstanding - basic (shares)									55,823,535	55,763,034	55,208,246
Dilutive impact of options and warrants (shares)									342,632	457,830	353,226
Weighted average common share outstanding - diluted (shares)									56,166,167	56,220,864	55,561,472
Per common share:
Basic income (loss) per common share (dollars per share)	$ 1.98	$ 0.18	$ 0.52	$ 0.46	$ 1.60	$ 0.24	$ 0.45	$ 0.39	$ 3.14	$ 2.68	$ 1.86
Diluted income (loss) per common share (dollars per share)	$ 1.97	$ 0.18	$ 0.51	$ 0.46	$ 1.59	$ 0.24	$ 0.45	$ 0.39	$ 3.12	$ 2.66	$ 1.84