| In millions, except per share items | Feb-02-13 | Jan-28-12 | Jan-29-11 | Jan-30-10 | Jan-31-09 | Feb-02-08 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net sales | 901.9 | 760.3 | 634.7 | 525.6 | 391.4 | 296.9 |
| Net sales growth | 18.6% | 19.8% | 20.8% | 34.3% | 31.8% | |
| Cost of goods sold | 556.4 | 473.7 | 399.9 | 337.7 | 257.9 | 195.0 |
| Gross profit | 345.5 | 286.6 | 234.8 | 187.9 | | |
| Gross margin | 100.0% | 100.0% | 100.0% | 100.0% | | |
| Selling, general, and administrative expense | 244.1 | 197.2 | 163.0 | 134.1 | | |
| Depreciation and amortization expense | 33.0 | 26.6 | 22.0 | 17.0 | | |
| Income from operations | 68.5 | 62.8 | 49.8 | 36.8 | | |
| Operating margin | 100.0% | 100.0% | 100.0% | 100.0% | | |
| Interest expenses (income), net | 0.0 | 0.0 | 0.1 | 0.4 | | |
| Income before income taxes | 68.5 | 62.9 | 49.8 | 36.4 | 20.7 | 15.1 |
| Provision for income taxes | 24.6 | 23.9 | 19.5 | 14.4 | | |
| Tax rate | 35.9% | 38.0% | 39.2% | 39.5% | 0.0% | 0.0% |
| Net income | 43.9 | 39.0 | 30.2 | 22.0 | | |
| |
| Basic income per common share | $1.81 | $1.60 | $1.25 | $0.99 | | |
| Diluted income per common share | $1.76 | $1.55 | $1.21 | $0.96 | | |
| |
| Weighted average basic common shares outstanding | 24.3 | 24.4 | 24.3 | 22.3 | | |
| Weighted average diluted common shares outstanding | 24.9 | 25.1 | 25.0 | 23.0 | | |