| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 19.47a | 296.22a |
| Accounts receivable, less allowances of $4,224 in 2024 and $4,427 in 2023 | 322.99a | 311.74a |
| Prepaid expenses | 35.5a | 32.65a |
| Income tax receivable | 44.11a | 1.01a |
| Other current assets | 13.7a | 7.08a |
| Total current assets | 435.77a | 648.69a |
| Property and equipment, at cost | 3,790.07a | 2,881.8a |
| Less-accumulated depreciation and amortization | 1,233.13a | 1,118.49a |
| Net property and equipment | 2,556.94a | 1,763.31a |
| Operating lease right-of-use assets | 126.83a | 118.73a |
| Goodwill and identifiable intangibles, net | 16.44a | 17.3a |
| Other noncurrent assets | 30.88a | 35.53a |
| Total assets | 3,166.86a | 2,583.57a |
| Liabilities and stockholders’ equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 114.56a | 141.88a |
| Wages, vacation and employees’ benefits | 49.95a | 75.51a |
| Claims and insurance accruals | 43.13a | 41.64a |
| Other current liabilities | 38.04a | 27.09a |
| Current portion of long-term debt | 5.31a | 10.17a |
| Current portion of operating lease liability | 27.37a | 25.76a |
| Total current liabilities | 278.36a | 322.06a |
| Other liabilities | — | — |
| Long-term debt, less current portion | 194.98a | 6.32a |
| Operating lease liability, less current portion | 96.8a | 96.46a |
| Deferred income taxes | 219.06a | 155.84a |
| Claims, insurance and other | 66.39a | 61.4a |
| Total other liabilities | 577.23a | 320.02a |
| Stockholders’ equity | — | — |
| Preferred stock | 0a | 0a |
| Common stock | 0.03a | 0.03a |
| Additional paid-in-capital | 295.11a | 285.09a |
| Deferred compensation trust | -7.98a | -5.68a |
| Retained earnings | 2,024.12a | 1,662.05a |
| Total stockholders’ equity | 2,311.27a | 1,941.49a |
| Total liabilities and stockholders’ equity | 3,166.86a | 2,583.57a |