| Revenues | | 82,308.00 | 85,294.00 | 81,506.00 | 83,130.00 |
| 2,483.00 | - | - | - | - |
| Selling, General, and Administrative | 2,483.00 | - | - | - | - |
| Interest Income/Expense | | 163.00 | 90.00 | 145.00 | 205.00 |
| Costs And Expenses | | 74,277.00 | 74,362.00 | 70,801.00 | 71,530.00 |
| Income/Loss From Continuing Operations Before Tax | | 8,031.00 | 10,932.00 | 10,705.00 | 11,600.00 |
| Income Tax Expense/Benefit | | 1,422.00 | 3,164.00 | 3,351.00 | 3,567.00 |
| | 6,609.00 | 7,768.00 | 7,354.00 | 8,033.00 |
| Attributable To Parent | | 6,501.00 | 7,548.00 | 7,082.00 | 7,713.00 |
| Attributable To Noncontrolling Interest | | 108.00 | 220.00 | 272.00 | 320.00 |
| Basic Average Shares | | -23.00 | 4,285.00 | 4,331.00 | 4,372.00 |
| Basic Earnings Per Share | | 1.54 | 1.76 | 1.64 | 1.76 |
| Diluted Earnings Per Share | | 1.54 | 1.76 | 1.64 | 1.76 |
| Common Stock Dividends | | 1.03 | 0.99 | 0.99 | 0.99 |