Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 29, 2018	Apr. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 12,382	$ 11,821
Weighted average common shares outstanding - basic	66,324	65,839
Dilutive effect of options and restricted stock units	1,871	1,537
Weighted average common shares outstanding - diluted	68,195	67,376
Basic earnings per common share (in dollars per share)	$ 0.19	$ 0.18
Diluted earnings per common share (in dollars per share)	$ 0.18	$ 0.18
Anti-dilutive shares not included in the above calculations	146	686