Revenue (Effect of Adoption on Financial Statements) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 29, 2018	Apr. 30, 2017	Jan. 28, 2018
Statements of Income
Net sales	$ 130,429	$ 143,802
Cost of sales	58,960	58,887
Provision for taxes	(17,510)	3,757
Net income	$ 12,382	$ 11,821
Basic (in dollars per share)	$ 0.19	$ 0.18
Diluted (in dollars per share)	$ 0.18	$ 0.18
Balance Sheets
Other current assets	$ 20,143		$ 17,250
Accrued liabilities	54,400		60,832
Deferred revenue	4,973		$ 12,758
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Statements of Income
Net sales	4,462
Cost of sales	1,016
Provision for taxes	724
Net income	$ 2,722
Basic (in dollars per share)	$ 0.04
Diluted (in dollars per share)	$ 0.04
Balance Sheets
Deferred revenue	$ (15,737)