Summarized Quarterly Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 298,535	$ 233,662	$ 302,641	$ 272,628	$ 293,179	$ 235,960	$ 284,709	$ 272,363	$ 1,107,466	$ 1,086,211	$ 1,022,588
Gross profit	164,402	129,279	179,297	164,146	162,077	125,176	165,969	159,410	637,124	612,632	580,304
Operating income	22,001	3,705	36,513	28,373	18,515	1,124	36,402	29,959	90,592	86,000	89,884
Net earnings from continuing operations					23,743	1,072	22,689	17,197	66,291	64,701	54,499
Income (loss) from discontinued operations, net of taxes					389	0	0	0	0	389	(2,038)
Net earnings	$ 16,679	$ 1,861	$ 27,184	$ 20,567	$ 24,132	$ 1,072	$ 22,689	$ 17,197	$ 66,291	$ 65,090	$ 52,461
Net earnings from continuing operations per share:
Basic (in dollars per share)					$ 1.43	$ 0.06	$ 1.37	$ 1.04	$ 3.97	$ 3.90	$ 3.30
Diluted (in dollars per share)					1.41	0.06	1.36	1.03	3.94	3.87	3.27
Income (loss) from discontinued operations, net of taxes, per share:
Basic (in dollars per share)					0.02	0.00	0.00	0.00	0.00	0.02	(0.12)
Diluted (in dollars per share)					0.02	0.00	0.00	0.00	0.00	0.02	(0.12)
Net earnings per share:
Basic (in dollars per share)	$ 1.00	$ 0.11	$ 1.63	$ 1.24	1.45	0.06	1.37	1.04	3.97	3.92	3.18
Diluted (in dollars per share)	$ 0.99	$ 0.11	$ 1.61	$ 1.23	$ 1.44	$ 0.06	$ 1.36	$ 1.03	$ 3.94	$ 3.89	$ 3.15
Weighted average shares outstanding:
Basic (in shares)	16,698	16,694	16,683	16,639	16,624	16,618	16,605	16,549	16,678	16,600	16,522
Diluted (in shares)	16,890	16,870	16,840	16,769	16,802	16,735	16,700	16,695	16,842	16,734	16,649
LIFO accounting charge	$ 700				$ 4,100				$ 800	$ 7,800
U.S. Tax Reform, reduction in tax expense									$ 11,500	$ 11,500