Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	May 04, 2019	May 05, 2018
Unaudited Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 343,295	$ 274,707
Cost of goods sold	224,692	177,934
Gross margin	118,603	96,773
Store operating, selling and administrative expenses	74,038	61,904
Depreciation and amortization	7,223	6,248
Operating income	37,342	28,621
Interest expense, net	46	57
Income before provision for income taxes	37,296	28,564
Provision for income taxes	9,439	7,055
Net income	$ 27,857	$ 21,509
Basic earnings per share (in dollars per share)	$ 1.52	$ 1.13
Diluted earnings per share (in dollars per share)	$ 1.50	$ 1.12
Weighted average shares outstanding:
Basic (in shares)	18,308	18,970
Diluted (in shares)	18,535	19,143