Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 29, 2017	Oct. 30, 2016	Oct. 29, 2017	Oct. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 13,338	$ 30,776	$ 37,723	$ 46,642
Weighted average common shares outstanding - basic	66,194	65,549	65,932	65,331
Dilutive effect of options and restricted stock units	1,623	657	1,623	568
Weighted average common shares outstanding - diluted	67,817	66,206	67,555	65,899
Basic earnings per common share (in dollars per share)	$ 0.20	$ 0.47	$ 0.57	$ 0.71
Diluted earnings per common share (in dollars per share)	$ 0.20	$ 0.46	$ 0.56	$ 0.71
Anti-dilutive shares not included in the above calculations	362	989	447	1,498