Shareholders' Equity - Schedule of changes (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Aug. 03, 2019	May 04, 2019	Aug. 04, 2018	May 05, 2018	Aug. 03, 2019	Aug. 04, 2018
Shareholders' Equity
Beginning Balance	$ 493,172	$ 478,355	$ 443,665	$ 429,824	$ 478,355	$ 429,824
Net earnings and other comprehensive income	29,703	21,269	26,900	19,986	50,972	46,886
Shares issued under equity plans	463	422	450	364
Compensation expense for equity awards	1,915	1,876	1,880	1,718
Repurchase of shares		(2,453)		(2,351)
Cash dividends declared and paid	(6,304)	(6,297)	(5,763)	(5,759)
Cumulative effect of change in accounting standard				(117)
Ending Balance	518,949	493,172	467,132	443,665	518,949	467,132
Common Stock
Shareholders' Equity
Beginning Balance	17,019	16,959	16,937	16,839	16,959	16,839
Shares issued under equity plans	16	91	14	128
Repurchase of shares		(31)		(30)
Ending Balance	17,035	17,019	16,951	16,937	17,035	16,951
Additional Paid-In Capital
Shareholders' Equity
Beginning Balance	142,761	142,976	136,297	136,664	142,976	136,664
Shares issued under equity plans	447	331	436	236
Compensation expense for equity awards	1,915	1,876	1,880	1,718
Repurchase of shares		(2,422)		(2,321)
Ending Balance	145,123	142,761	138,613	136,297	145,123	138,613
Retained Earnings
Shareholders' Equity
Beginning Balance	338,875	323,515	295,086	280,395	323,515	280,395
Net earnings and other comprehensive income	29,836	21,657	27,184	20,567
Cash dividends declared and paid	(6,304)	(6,297)	(5,763)	(5,759)
Cumulative effect of change in accounting standard				(117)
Ending Balance	362,407	338,875	316,507	295,086	362,407	316,507
Accumulated Other Comprehensive (Loss) Income
Shareholders' Equity
Beginning Balance	(5,483)	(5,095)	(4,655)	(4,074)	(5,095)	(4,074)
Net earnings and other comprehensive income	(133)	(388)	(284)	(581)
Ending Balance	$ (5,616)	$ (5,483)	$ (4,939)	$ (4,655)	$ (5,616)	$ (4,939)