| Revenues | | 11.59 | 11.09 | 11.21 | 11.26 |
| | 171.50 | 183.31 | 181.62 | 176.97 |
| Selling, General, and Administrative | | 6.78 | 9.95 | 6.75 | 8.50 |
| Other Operating Expenses | | 164.72 | 173.36 | 174.87 | 168.47 |
| Interest Income/Expense | | 3.46 | 3.51 | 3.47 | 3.46 |
| Benefits Costs and Expenses | 161.38 | - | 183.31 | 181.62 | 176.97 |
| Costs And Expenses | 161.38 | - | 183.31 | 181.62 | 176.97 |
| Operating Income/Loss | | 6.46 | 4.46 | 6.31 | 11.91 |
| Income/Loss Before Equity Method Investments | | 6.46 | 4.46 | 6.31 | 11.91 |
| Income/Loss From Equity Method Investments | | 0.00 | 0.00 | 0.01 | 0.00 |
| Income/Loss From Continuing Operations Before Tax | | 11.59 | 4.46 | 6.31 | 11.91 |
| Income Tax Expense/Benefit, Deferred | | -0.96 | 1.60 | 0.38 | 2.64 |
| Income Tax Expense/Benefit | | -0.37 | 0.45 | 1.18 | 2.85 |
| Income/Loss From Continuing Operations After Tax | | 7.57 | 4.97 | 5.76 | 10.36 |
| | 7.57 | 4.97 | 5.76 | 10.36 |
| Attributable To Parent | | 7.57 | 4.97 | 5.76 | 10.36 |
| Available To Common Stockholders, Basic | | 7.57 | 4.97 | 5.76 | 10.36 |
| Preferred Stock Dividends And Other Adjustments | - | - | - | - | - |
| Attributable To Noncontrolling Interest | - | - | - | - | - |
| Basic Average Shares | | 0.01 | 50.09 | 50.09 | 49.98 |
| Diluted Average Shares | | 0.01 | 50.09 | 50.09 | 49.98 |
| Basic Earnings Per Share | | 0.15 | 0.09 | 0.12 | 0.21 |
| Diluted Earnings Per Share | | 0.15 | 0.09 | 0.12 | 0.21 |
| Common Stock Dividends | 0.02 | - | 0.02 | 0.02 | 0.02 |
| Participating Securities, Distributed And Undistributed Earnings/Loss, Basic | - | - | - | - | - |