| Revenues | | 48.47 | 46.15 | 43.40 | 41.38 |
| | 6.51 | 5.71 | - | - |
| Selling, General, and Administrative | | 6.51 | 5.71 | - | - |
| Costs And Expenses | | 35.39 | 39.04 | 32.65 | 31.46 |
| Operating Income/Loss | | 13.07 | 7.11 | 10.76 | 9.92 |
| Nonoperating Income/Loss | | -4.15 | -1.27 | -3.19 | -3.14 |
| Income/Loss From Continuing Operations Before Tax | | 8.92 | 5.85 | 7.56 | 6.79 |
| Income Tax Expense/Benefit, Deferred | | 2.12 | 1.86 | 1.79 | 1.56 |
| Income Tax Expense/Benefit | | 2.16 | 1.75 | 1.78 | 1.60 |
| | 6.76 | 4.10 | 5.78 | 5.19 |
| Attributable To Parent | | 6.76 | 4.10 | 5.78 | 5.19 |
| Basic Average Shares | | 12.58 | - | 12.54 | 12.48 |
| Diluted Average Shares | | 12.75 | - | 12.69 | 12.63 |
| Basic Earnings Per Share | | 0.54 | - | 0.46 | 0.42 |
| Diluted Earnings Per Share | | 0.53 | - | 0.46 | 0.41 |
| Common Stock Dividends | | 0.11 | 0.11 | 0.10 | - |