| Operating Expenses | | 18.68 | 19.65 | 16.98 | 15.72 |
| Depreciation and Amortization | | 8.57 | 7.13 | 6.70 | 6.83 |
| Operating Income/Loss | | 13.48 | 7.07 | 15.86 | 15.35 |
| | 6.24 | 2.42 | 11.11 | 9.42 |
| Attributable To Parent | | 6.24 | 2.41 | 10.48 | 8.43 |
| Available To Common Stockholders, Basic | | 5.90 | 2.08 | 10.12 | 8.10 |
| Attributable To Noncontrolling Interest | | 0.00 | 0.01 | 0.63 | 0.99 |
| Basic Average Shares | | 21.05 | 0.01 | 20.88 | 20.85 |
| Diluted Average Shares | | 21.12 | -0.00 | 20.95 | 20.97 |
| Basic Earnings Per Share | | 0.28 | 0.10 | 0.48 | 0.39 |
| Diluted Earnings Per Share | | 0.28 | 0.10 | 0.48 | 0.39 |
| Common Stock Dividends | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 |
| Participating Securities, Distributed And Undistributed Earnings/Loss, Basic | | 0.34 | 0.33 | 0.36 | 0.33 |