| | 2008 | 2007 | 2006 | 2005 | 2004 |
| Period End Date | 12/31/2008 | 12/31/2007 | 12/31/2006 | 12/31/2005 | 12/31/2004 |
| Period Length | 12 Months | 12 Months | 12 Months | 12 Months | 12 Months |
| Stmt Source | 10-K | 10-K | 10-K | 10-K | 10-K |
| Stmt Source Date | 02/09/2009 | 02/07/2008 | 02/12/2007 | 02/16/2006 | 02/22/2005 |
| Stmt Update Type | Updated | Updated | Updated | Updated | Updated |
| | | | | | |
| Revenue | 1,724.43 | 1,569.98 | 1,389.46 | 1,169.61 | 969.53 |
| Total Revenue | 1,724.43 | 1,569.98 | 1,389.46 | 1,169.61 | 969.53 |
| | | | | | |
| Cost of Revenue, Total | 1,380.7 | 1,264.06 | 1,106.74 | 933.86 | 771.83 |
| Gross Profit | 343.74 | 305.92 | 282.73 | 235.76 | 197.69 |
| | | | | | |
| Selling/General/Administrative Expenses, Total | 263.19 | 227.55 | 205.73 | 176.82 | 158.05 |
| Research & Development | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Depreciation/Amortization | 15.57 | 16.16 | 15.44 | 15.17 | 17.51 |
| Interest Expense (Income), Net Operating | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Unusual Expense (Income) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other Operating Expenses, Total | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Operating Income | 64.98 | 62.21 | 61.57 | 43.77 | 22.13 |
| | | | | | |
| Interest Income (Expense), Net Non-Operating | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gain (Loss) on Sale of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other, Net | 0.04 | -0.38 | 0.25 | -0.21 | 8.25 |
| Income Before Tax | 72.02 | 73.44 | 72.08 | 47.75 | 30.74 |
| | | | | | |
| Income Tax - Total | 26.24 | 25.95 | 25.58 | 17.76 | 11.53 |
| Income After Tax | 45.78 | 47.49 | 46.51 | 29.98 | 19.21 |
| | | | | | |
| Minority Interest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Equity In Affiliates | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| U.S. GAAP Adjustment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net Income Before Extra. Items | 45.78 | 47.49 | 46.51 | 29.98 | 19.21 |
| | | | | | |
| Total Extraordinary Items | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net Income | 45.78 | 47.49 | 46.51 | 29.98 | 19.21 |
| | | | | | |
| | | | | | |
Total Adjustments to Net Income | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Preferred Dividends | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | General Partners' Distributions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
|
| | | | | | |
| Basic Weighted Average Shares | 25.23 | 26.66 | 27.47 | 25.93 | 26.1 |
| Basic EPS Excluding Extraordinary Items | 1.81 | 1.78 | 1.69 | 1.16 | 0.74 |
| Basic EPS Including Extraordinary Items | 1.81 | 1.78 | 1.69 | 1.16 | 0.74 |
| | | | | | |
| Diluted Weighted Average Shares | 25.58 | 27.26 | 28.36 | 26.85 | 26.86 |
| Diluted EPS Excluding Extrordinary Items | 1.79 | 1.74 | 1.64 | 1.12 | 0.72 |
| Diluted EPS Including Extraordinary Items | 1.79 | 1.74 | 1.64 | 1.12 | 0.72 |
| | | | | | |
| Dividends per Share - Common Stock Primary Issue | 0.48 | 0.44 | 0.36 | 0.28 | 0.0 |
| Gross Dividends - Common Stock | 12.41 | 11.9 | 10.02 | 7.39 | 0.0 |
| Interest Expense, Supplemental | 0.07 | 0.11 | 1.11 | 2.36 | 2.09 |
| Depreciation, Supplemental | 15.23 | 16.02 | 15.3 | 15.48 | 17.77 |
| | | | | | |
| Normalized EBITDA | 80.55 | 78.37 | 77.0 | 59.25 | 39.9 |
| Normalized EBIT | 64.98 | 62.21 | 61.57 | 43.77 | 22.13 |
| Normalized Income Before Tax | 72.02 | 73.44 | 72.08 | 47.75 | 30.74 |
| Normalized Income After Taxes | 45.78 | 47.49 | 46.51 | 29.98 | 19.21 |
| Normalized Income Available to Common | 45.78 | 47.49 | 46.51 | 29.98 | 19.21 |
| | | | | | |
| Basic Normalized EPS | 1.81 | 1.78 | 1.69 | 1.16 | 0.74 |
| Diluted Normalized EPS | 1.79 | 1.74 | 1.64 | 1.12 | 0.72 |
| Amortization of Intangibles | 0.34 | 0.14 | 0.14 | 0.0 | 0.0 |