Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Income Statement [Abstract]
Net sales	$ 1,278,208	$ 1,000,410	$ 831,954
Cost of goods sold	814,795	643,373	540,020
Gross profit	463,413	357,037	291,934
Selling, general and administrative expenses	306,022	243,075	198,993
Operating income	157,391	113,962	92,941
Interest income, net	(1,458)	(299)	(40)
Other expense	0	0	325
Income before income taxes	158,849	114,261	92,656
Income tax expense	56,398	42,421	34,976
Net income	$ 102,451	$ 71,840	$ 57,680
Basic (loss) income per common share (dollars per share)	$ 1.86	$ 1.31	$ 1.06
Diluted (loss) income per common share (dollars per share)	$ 1.84	$ 1.30	$ 1.05
Weighted average shares outstanding:
Basic shares	55,208,246	54,845,708	54,513,622
Diluted shares	55,561,472	55,128,870	54,793,301