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Statements of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Statement [Abstract] |  |  |
Revenue from operations | $ 5,866,152 | $ 6,260,077 | $ 5,256,328
Operating expenses: |  |  |
Salaries, wages and benefits | 2,629,676 | 2,716,835 | 2,467,985
Operating supplies and expenses | 718,326 | 852,955 | 567,615
General supplies and expenses | 162,416 | 159,998 | 136,059
Operating taxes and licenses | 145,642 | 141,239 | 133,452
Insurance and claims | 75,368 | 58,301 | 53,549
Communications and utilities | 43,269 | 40,584 | 34,149
Depreciation and amortization | 324,435 | 276,050 | 259,883
Purchased transportation | 121,516 | 158,111 | 185,785
Miscellaneous expenses, net | 4,831 | 15,372 | 26,249
Total operating expenses | 4,225,479 | 4,419,445 | 3,864,726
Operating income | 1,640,673 | 1,840,632 | 1,391,602
Non-operating (income) expense: |  |  |
Interest expense | 464 | 1,563 | 1,727
Interest income | (12,799) | (4,884) | (786)
Other expense, net | 5,232 | 2,604 | 2,238
Total non-operating (income) expense | (7,103) | (717) | 3,179
Income before income taxes | 1,647,776 | 1,841,349 | 1,388,423
Provision for income taxes | 408,274 | 464,190 | 354,048
Net income | $ 1,239,502 | $ 1,377,159 | $ 1,034,375
Earnings per share: |  |  |
Basic | $ 11.33 | $ 12.26 | $ 8.94
Diluted | $ 11.26 | $ 12.18 | $ 8.89
Weighted average shares outstanding: |  |  |
Basic | 109,421,245 | 112,340,791 | 115,651,411
Diluted | 110,090,212 | 113,077,820 | 116,409,989
Dividends declared per share | $ 1.6 | $ 1.20 | $ 0.80

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