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Revenue (Effect of Adoption on Financial Statements) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 28, 2018 | Oct. 29, 2017 | Oct. 28, 2018 | Oct. 29, 2017 | Jan. 28, 2018
Statements of Income |  |  |  |  |
Net sales | $ 173,550 | $ 150,304 | $ 467,190 | $ 447,233 |
Cost of sales | 66,988 | 60,885 | 189,035 | 180,663 |
Provision for taxes | (1,454) | 3,272 | (12,882) | 11,124 |
Net income | $ 12,165 | $ 13,338 | $ 49,716 | $ 37,723 |
Basic (in dollars per share) | $ 0.18 | $ 0.20 | $ 0.75 | $ 0.57 |
Diluted (in dollars per share) | $ 0.18 | $ 0.20 | $ 0.73 | $ 0.56 |
Balance Sheets |  |  |  |  |
Other current assets | $ 18,126 |  | $ 18,126 |  | $ 17,250
Accrued liabilities | 60,856 |  | 60,856 |  | 60,832
Deferred revenue | 965 |  | 965 |  | $ 12,758
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |  |
Statements of Income |  |  |  |  |
Net sales | 3,251 |  | 9,597 |  |
Cost of sales | 746 |  | 2,190 |  |
Provision for taxes | 526 |  | 1,555 |  |
Net income | $ 1,979 |  | $ 5,851 |  |
Basic (in dollars per share) | $ 0.03 |  | $ 0.09 |  |
Diluted (in dollars per share) | $ 0.03 |  | $ 0.09 |  |
Balance Sheets |  |  |  |  |
Deferred revenue | $ (19,889) |  | $ (19,889) |  |

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