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OPERATING SEGMENT DATA - Operating Expenses by Category (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
OPERATING EXPENSES |  |  |
Salaries, wages, and benefits | $ 1,768,581 | $ 1,781,304 | $ 1,728,653
Rents, purchased transportation, and other costs of services | 1,478,114 | 1,642,669 | 2,100,663
Fuel, supplies, and expenses | 433,237 | 479,688 | 488,009
Depreciation and amortization | 149,087 | 145,349 | 138,159
Contingent consideration | (90,250) | (19,100) | 18,300
Asset impairment charges | 1,700 | 30,162 |
Other | 194,116 | 194,752 | 160,698
Total consolidated operating expenses | 3,934,585 | 4,254,824 | 4,634,482
Gain on sale of subsidiaries |  |  | 402
Gain on sale of property and equipment | 2,176 | (4,797) | 11,650
Innovative technology costs | 34,100 | 52,400 | 40,800
Operating Segments | Asset-Based |  |  |
OPERATING EXPENSES |  |  |
Salaries, wages, and benefits | 1,387,491 | 1,379,756 | 1,293,487
Fuel, supplies, and expenses | 316,526 | 361,355 | 378,558
Depreciation and amortization | 110,021 | 104,165 | 97,322
Asset impairment charges |  | 700 |
Other | 3,800 | 4,829 | 4,175
Total consolidated operating expenses | 2,507,531 | 2,617,852 | 2,629,767
Gain related to sale of property and equipment and sale of replaced equipment and like-kind exchange of service center property |  |  | 12,500
Operating Segments | Asset-Light |  |  |
OPERATING EXPENSES |  |  |
Salaries, wages, and benefits | 118,983 | 129,083 | 150,694
Depreciation and amortization | 20,062 | 20,370 | 20,730
Contingent consideration | (90,250) | (19,100) | 18,300
Asset impairment charges | 1,700 | 14,407 |
Other | 25,362 | 25,650 | 31,163
Total consolidated operating expenses | 1,494,492 | 1,692,916 | 2,086,547
Legal settlement | 274 | 9,500 |
Gain on sale of subsidiaries |  |  | 402
Other and eliminations |  |  |
OPERATING EXPENSES |  |  |
Depreciation and amortization | 19,004 | 20,814 | 20,107
Asset impairment charges |  | 15,100 |
Total consolidated operating expenses | $ (67,438) | $ (55,944) | $ (81,832)

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- Definition Fuel costs incurred that are directly related to services rendered during the reporting period and the cost of materials used in services rendered during the reporting period. It also includes costs related to selling products and services, as well as other general and administrative expenses not separately disclosed in operating expenses and costs. + References No definition available. + Details
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