| Period Ended | 12.31.2012 | 12.31.2011 | 12.31.2010 | 12.31.2009 | 12.31.2008 |
| Net Sales | 1414.4 | 1377.28 | 1000.99 | 813.18 | 689.45 |
| Revenue | 1414.4 | 1377.28 | 1000.99 | 813.18 | 689.45 |
| Total Revenue | 1414.4 | 1377.28 | 1000.99 | 813.18 | 689.45 |
| Cost of Revenue | 782.24 | 698.29 | 498.05 | 442.09 | 384.13 |
| Cost of Revenue, Total | 782.24 | 698.29 | 498.05 | 442.09 | 384.13 |
| Gross Profit | 632.15 | 679 | 502.94 | 371.09 | 305.32 |
| Selling/General/Administrative Expense | 429.59 | 394.16 | 253.85 | 188.84 | 152.57 |
| Selling/General/Admin. Expenses, Total | 429.59 | 394.16 | 253.85 | 188.84 | 152.57 |
| Research & Development | 15.62 | n/a | n/a | n/a | n/a |
| Other Unusual Expense (Income) | n/a | n/a | n/a | 1 | 35.83 |
| Unusual Expense (Income) | n/a | n/a | n/a | 1 | 35.83 |
| Total Operating Expense | 1227.45 | 1092.45 | 751.9 | 631.93 | 572.53 |
| Operating Income | 186.95 | 284.84 | 249.09 | 181.25 | 116.92 |
| Interest Expense - Non-Operating | -3.84 | -0.25 | -0.57 | n/a | n/a |
| Interest Expense, Net Non-Operating | -3.84 | -0.25 | -0.57 | n/a | n/a |
| Interest Income - Non-Operating | 0.22 | 0.18 | 0.23 | 1.01 | 3.19 |
| Interest/Invest Income - Non-Operating | 0.22 | 0.18 | 0.23 | 1.01 | 3.19 |
| Interest Income(Exp), Net Non-Operating | n/a | n/a | n/a | 0.88 | 0.14 |
| Interest Inc.(Exp.),Net-Non-Op., Total | -3.62 | -0.07 | -0.33 | 1.89 | 3.33 |
| Other Non-Operating Income (Expense) | 0.79 | 0.49 | 1.35 | 0.09 | 0.25 |
| Other, Net | 0.79 | 0.49 | 1.35 | 0.09 | 0.25 |
| Net Income Before Taxes | 184.12 | 285.26 | 250.11 | 183.22 | 120.5 |
| Provision for Income Taxes | 55.1 | 83.4 | 89.73 | 66.3 | 46.63 |
| Net Income After Taxes | 129.01 | 201.86 | 160.38 | 116.92 | 73.87 |
| Minority Interest | -0.15 | -2.81 | -2.14 | -0.13 | 0.08 |
| Net Income Before Extra. Items | 128.87 | 199.05 | 158.24 | 116.79 | 73.95 |
| Net Income | 128.87 | 199.05 | 158.24 | 116.79 | 73.95 |
| Income Available to Com Excl ExtraOrd | 128.87 | 199.05 | 158.24 | 116.79 | 73.95 |
| Income Available to Com Incl ExtraOrd | 128.87 | 199.05 | 158.24 | 116.79 | 73.95 |
| Basic Weighted Average Shares | 36.88 | 38.61 | 38.62 | 39.02 | 39.13 |
| Basic EPS Excluding Extraordinary Items | 3.49 | 5.16 | 4.1 | 2.99 | 1.89 |
| Basic EPS Including Extraordinary Items | 3.49 | 5.16 | 4.1 | 2.99 | 1.89 |
| Dilution Adjustment | n/a | n/a | n/a | n/a | n/a |
| Diluted Net Income | 128.87 | 199.05 | 158.24 | 116.79 | 73.95 |
| Diluted Weighted Average Shares | 37.33 | 39.27 | 39.29 | 39.39 | 39.59 |
| Diluted EPS Excluding ExtraOrd Items | 3.45 | 5.07 | 4.03 | 2.96 | 1.87 |
| Diluted EPS Including ExtraOrd Items | 3.45 | 5.07 | 4.03 | 2.96 | 1.87 |
| DPS - Common Stock Primary Issue | n/a | n/a | n/a | n/a | n/a |
| Gross Dividends - Common Stock | n/a | n/a | n/a | n/a | n/a |
| Stock-Based Compensation, Supplemental | 14.66 | 14.8 | 12.78 | 13.02 | 10.19 |
| Interest Expense, Supplemental | 3.84 | 0.25 | 0.57 | n/a | 0.35 |
| Depreciation, Supplemental | 33.37 | 19.38 | 9.69 | 9.81 | 5.8 |
| Total Special Items | n/a | n/a | n/a | 1 | 35.83 |
| Normalized Income Before Taxes | 184.12 | 285.26 | 250.11 | 184.22 | 156.33 |
| Effect of Special Items on Income Taxes | n/a | n/a | n/a | 0.36 | 13.86 |
| Inc Tax Ex Impact of Sp Items | 55.1 | 83.4 | 89.73 | 66.67 | 60.49 |
| Normalized Income After Taxes | 129.01 | 201.86 | 160.38 | 117.56 | 95.83 |
| Normalized Inc. Avail to Com. | 128.87 | 199.05 | 158.24 | 117.42 | 95.91 |
| Basic Normalized EPS | 3.49 | 5.16 | 4.1 | 3.01 | 2.45 |
| Diluted Normalized EPS | 3.45 | 5.07 | 4.03 | 2.98 | 2.42 |
| Amort of Intangibles, Supplemental | n/a | 9.6 | 2.6 | 0.39 | 0.21 |
| Rental Expense, Supplemental | 46.64 | 32.73 | 21.05 | 14.85 | 11.1 |
| Advertising Expense, Supplemental | 78.53 | 57.26 | 33.1 | 28.73 | 24.87 |
| Minority Interest, Supplemental | -0.15 | -2.81 | -2.14 | -0.13 | 0.08 |
| Research & Development Exp, Supplemental | 15.62 | 14.16 | 11.83 | 8.11 | 5.62 |
| Audit Fees | n/a | 2.04 | 1.24 | 1.2 | 1.16 |
| Audit-Related Fees | n/a | 0.23 | n/a | n/a | n/a |
| Tax Fees | n/a | 0.06 | 0.02 | 0.04 | 0.23 |
| All Other Fees | n/a | n/a | n/a | n/a | n/a |
| Gross Margin | 44.69 | 49.3 | 50.24 | 45.63 | 44.28 |
| Operating Margin | 13.22 | 20.68 | 24.88 | 22.29 | 16.96 |
| Pretax Margin | 13.02 | 20.71 | 24.99 | 22.53 | 17.48 |
| Effective Tax Rate | 29.93 | 29.24 | 35.88 | 36.19 | 38.7 |
| Net Profit Margin | 9.11 | 14.45 | 15.81 | 14.36 | 10.73 |
| Normalized EBIT | 186.95 | 284.84 | 249.09 | 182.25 | 152.74 |
| Normalized EBITDA | 220.32 | 313.82 | 261.37 | 192.44 | 158.75 |
| Current Tax - Domestic | 50.91 | 63.76 | 71.03 | 48.52 | 55.51 |
| Current Tax - Foreign | 3.37 | 7.49 | 3.65 | 2.12 | 0.83 |
| Current Tax - Local | 6.48 | 12.23 | 16.76 | 10.35 | 12.43 |
| Current Tax - Total | 60.76 | 83.47 | 91.44 | 61 | 68.76 |
| Deferred Tax - Domestic | -6.08 | 1 | -2.18 | 4.75 | -18.13 |
| Deferred Tax - Foreign | 0.01 | n/a | 0.09 | -0.03 | -0.23 |
| Deferred Tax - Local | 0.41 | -1.07 | 0.38 | 0.59 | -3.77 |
| Deferred Tax - Total | -5.66 | -0.07 | -1.71 | 5.31 | -22.13 |
| Income Tax - Total | 55.1 | 83.4 | 89.73 | 66.3 | 46.63 |
| Defined Contribution Expense - Domestic | 1.07 | 1.71 | 0.86 | 1.02 | 0.52 |
| Total Pension Expense | 1.07 | 1.71 | 0.86 | 1.02 | 0.52 |