Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Income Statement [Abstract]
Net sales	$ 331,383,000	$ 275,475,000	$ 1,042,827,000	$ 871,210,000
Cost of goods sold	$ 204,347,000	$ 185,307,000	$ 678,047,000	$ 586,502,000
Cost of goods sold, as a percent to sales	61.70%	67.30%	65.00%	67.30%
Gross margin	$ 127,036,000	$ 90,168,000	$ 364,780,000	$ 284,708,000
Gross margin, as a percent to sales	38.30%	32.70%	35.00%	32.70%
Store operating, selling and administrative expenses	$ 86,330,000	$ 80,147,000	$ 255,838,000	$ 234,085,000
Store operating, selling and administrative expenses, as a percent to sales	26.10%	29.10%	24.50%	26.90%
Goodwill impairment	$ 0	$ 0	$ 19,661,000	$ 0
Goodwill impairment, as a percent to sales	0.00%	0.00%	1.90%	0.00%
Depreciation and amortization	$ 7,541,000	$ 7,397,000	$ 21,895,000	$ 22,299,000
Depreciation and amortization, as a percent to sales	2.30%	2.70%	2.10%	2.60%
Operating income	$ 33,165,000	$ 2,624,000	$ 67,386,000	$ 28,324,000
Operating income, as a percent to sales	10.00%	1.00%	6.50%	3.30%
Interest expense (income), net	$ 32,000	$ (151,000)	$ 407,000	$ (179,000)
Interest expense (income), net, as a percent to sales	0.00%	(0.10%)	0.00%	0.00%
Income before provision for income taxes	$ 33,133,000	$ 2,775,000	$ 66,979,000	$ 28,503,000
Income before provision for income taxes, as a percent to sales	10.00%	1.00%	6.40%	3.30%
Provision for income taxes	$ 7,867,000	$ 510,000	$ 16,645,000	$ 7,159,000
Provision for income taxes, as a percent to sales	2.40%	0.20%	1.60%	0.80%
Net income	$ 25,266,000	$ 2,265,000	$ 50,334,000	$ 21,344,000
Net income, as a percent to sales	7.60%	0.80%	4.80%	2.40%
Basic earnings per share (in dollars per share)	$ 1.52	$ 0.13	$ 3.04	$ 1.19
Diluted earnings per share (in dollars per share)	$ 1.47	$ 0.13	$ 2.98	$ 1.18
Weighted-average shares outstanding:
Basic (in shares)	16,572	17,568	16,551	17,927
Diluted (in shares)	17,177	17,815	16,902	18,085