| Period End Date | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
|---|---|---|---|---|---|
| Period Length | 3 Months | 3 Months | 3 Months | 3 Months | 3 Months |
| Revenues | 14.47%435.00 | 380.00 | 375.00 | 340.00 | 316.00 |
4.91%342.00 | 326.00 | 334.00 | 171.00 | 262.00 | |
| Selling, General, and Administrative | 10.00%36.00 | 40.00 | 33.00 | 28.00 | 36.00 |
| Other Operating Expenses | 6.99%306.00 | 286.00 | 301.00 | 143.00 | 226.00 |
| Interest Income/Expense | 6.00 | 6.00 | 6.00 | 6.00 | 5.00 |
| Benefits Costs and Expenses | 7.47%374.00 | 348.00 | 353.00 | 232.00 | 286.00 |
| Costs And Expenses | 4.91%342.00 | 326.00 | 334.00 | 171.00 | 262.00 |
| Operating Income/Loss | 72.22%93.00 | 54.00 | 41.00 | 169.00 | 54.00 |
| Income/Loss From Continuing Operations Before Tax | 27.08%61.00 | 48.00 | 35.00 | 163.00 | 30.00 |
| Income Tax Expense/Benefit, Deferred | 100.00%10.00 | 5.00 | -95.00 | 76.00 | 24.00 |
| Income Tax Expense/Benefit | 62.50%26.00 | 16.00 | 13.00 | 55.00 | 19.00 |
| Income/Loss From Continuing Operations After Tax | 90.63%61.00 | 32.00 | 22.00 | 108.00 | 30.00 |
90.63%61.00 | 32.00 | 22.00 | 108.00 | 30.00 | |
| Attributable To Parent | 90.63%61.00 | 32.00 | 22.00 | 108.00 | 30.00 |
| Available To Common Stockholders, Basic | 90.63%61.00 | 32.00 | 22.00 | 108.00 | 30.00 |
| Preferred Stock Dividends And Other Adjustments | - | - | - | - | - |
| Attributable To Noncontrolling Interest | - | - | - | - | - |
| Basic Average Shares | 99.99%0.01 | 58.34 | 58.33 | 58.28 | -0.00 |
| Diluted Average Shares | 99.96%0.02 | 58.44 | 58.38 | 58.37 | -0.02 |
| Basic Earnings Per Share | 96.30%1.06 | 0.54 | 0.38 | 1.85 | 0.52 |
| Diluted Earnings Per Share | 96.30%1.06 | 0.54 | 0.38 | 1.85 | 0.52 |
| Common Stock Dividends | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 |
| Participating Securities, Distributed And Undistributed Earnings/Loss, Basic | - | - | - | - | - |
