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. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Numerator:
Net income	$ 67,377	$ 9,879	$ 16,804	$ 8,391	$ 49,788	$ 5,447	$ 9,847	$ 6,758	$ 102,451	$ 71,840	$ 57,680
Denominator:
Weighted-average common shares outstanding - basic (shares)									55,208,246	54,845,708	54,513,622
Dilutive impact of options and warrants (shares)									353,226	283,162	279,679
Weighted average common share outstanding - diluted (shares)									55,561,472	55,128,870	54,793,301
Per common share:
Basic income (loss) per common share (dollars per share)	$ 1.22	$ 0.18	$ 0.30	$ 0.15	$ 0.91	$ 0.10	$ 0.18	$ 0.12	$ 1.86	$ 1.31	$ 1.06
Diluted income (loss) per common share (dollars per share)	$ 1.21	$ 0.18	$ 0.30	$ 0.15	$ 0.90	$ 0.10	$ 0.18	$ 0.12	$ 1.84	$ 1.30	$ 1.05