Income (Loss) 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. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Numerator:
Net income	$ 5,447	$ 4,337	$ 22,052	$ 15,676
Denominator:
Weighted-average common shares outstanding - basic (shares)	54,871,172	54,529,403	54,809,768	54,525,797
Dilutive impact of options and warrants (shares)	299,514	303,849	290,766	286,181
Weighted average common share outstanding - diluted (shares)	55,170,686	54,833,252	55,100,534	54,811,978
Per common share:
Basic income (loss) per common share (dollars per share)	$ 0.10	$ 0.08	$ 0.40	$ 0.29
Diluted income (loss) per common share (dollars per share)	$ 0.10	$ 0.08	$ 0.40	$ 0.29