Earnings Per Share - Computation Of Basic And Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 30, 2016	Oct. 25, 2015	Oct. 30, 2016	Oct. 25, 2015
Earnings Per Share [Abstract]
Net income	$ 30,776	$ 10,704	$ 46,642	$ 10,250
Weighted average common shares outstanding - basic	65,549	65,117	65,331	65,920
Dilutive effect of options and restricted stock units	657	100	568	331
Weighted average common shares outstanding - diluted	66,206	65,217	65,899	66,251
Basic earnings per common share (in dollars per share)	$ 0.47	$ 0.16	$ 0.71	$ 0.16
Diluted earnings per common share (in dollars per share)	$ 0.46	$ 0.16	$ 0.71	$ 0.15
Anti-dilutive shares not included in the above calculations	989	3,728	1,498	2,392