Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Income Statement [Abstract]
Net sales	$ 831,954	$ 680,218	$ 535,402
Cost of goods sold	540,020	442,427	347,386
Gross profit	291,934	237,791	188,016
Selling, general and administrative expenses	198,993	160,775	134,279
Operating income	92,941	77,016	53,737
Interest (income) expense, net	(40)	125	1,513
Loss on debt extinguishment	0	244	266
Other expense (income)	325	(12)	0
Income before income taxes	92,656	76,659	51,958
Income tax expense	34,976	28,635	19,816
Net income	57,680	48,024	32,142
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted	0	(20)	(465)
Net income attributable to common shareholders	$ 57,680	$ 48,004	$ 31,677
Basic (loss) income per common share (dollars per share)	$ 1.06	$ 0.89	$ 0.59
Diluted (loss) income per common share (dollars per share)	$ 1.05	$ 0.88	$ 0.59
Weighted average shares outstanding:
Basic shares	54,513,622	54,219,801	53,294,805
Diluted shares	54,793,301	54,573,855	53,741,860