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Earnings Per Share - Computation of Basic and Diluted Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Earnings Per Share [Abstract]
Net income	$ 9,541	$ 8,916	$ 16,381	$ 10,611
Weighted-average shares of common stock outstanding:
Basic	42,004	41,818	41,953	39,342
Dilutive effect of common stock equivalents	358	113	333	211
Diluted	42,362	41,931	42,286	39,553
Basic earnings per share	$ 0.23	$ 0.21	$ 0.39	$ 0.27
Diluted earnings per share	$ 0.23	$ 0.21	$ 0.39	$ 0.27

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