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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		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Earnings Per Share [Abstract]
Net income	$ 8,200	$ 5,063	$ 6,840	$ 1,695
Weighted-average shares of common stock outstanding:
Basic	42,004	41,768	41,927	38,105
Dilutive effect of common stock equivalents	332	198	315	210
Diluted	42,336	41,966	42,242	38,315
Basic earnings per share	$ 0.20	$ 0.12	$ 0.16	$ 0.04
Diluted earnings per share	$ 0.19	$ 0.12	$ 0.16	$ 0.04
Restricted stock units considered anti-dilutive and excluded in the calculation	22		22

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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