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OPERATING SEGMENT DATA - Operating expenses (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
OPERATING EXPENSES |  |
Salaries, wages, and benefits | $ 359,395 | $ 344,946
Fuel, supplies, and expenses | 73,149 | 71,773
Depreciation and amortization | 30,354 | 29,013
Gain on sale of property and equipment | (8,635) | (2,130)
Other | 24,786 | 30,820
Total consolidated operating expenses | 797,022 | 693,580
Operating Segments | Asset Based |  |
OPERATING EXPENSES |  |
Salaries, wages, and benefits | 285,694 | 283,838
Fuel, supplies, and expenses | 60,841 | 61,225
Operating taxes and licenses | 12,248 | 12,794
Insurance | 8,939 | 7,824
Communications and utilities | 4,970 | 4,711
Depreciation and amortization | 23,484 | 23,270
Rents and purchased transportation | 75,588 | 55,770
Shared services | 55,866 | 48,885
Gain on sale of property and equipment | (8,695) | (2,164)
Innovative technology costs | 6,868 | 4,533
Other | 434 | 1,787
Total consolidated operating expenses | 526,237 | 502,473
Operating Segments | Asset Based | Land and structures (service centers) |  |
OPERATING EXPENSES |  |
Gain on sale of property and equipment | (8,600) |
Operating Segments | ArcBest |  |
OPERATING EXPENSES |  |
Purchased transportation | 210,995 | 137,182
Supplies and expenses | 2,568 | 2,280
Depreciation and amortization | 2,386 | 2,470
Shared services | 26,072 | 21,727
Other | 2,050 | 2,525
Total consolidated operating expenses | 244,071 | 166,184
Operating Segments | FleetNet |  |
OPERATING EXPENSES |  |
Total consolidated operating expenses | 58,140 | 51,399
Other and eliminations |  |
OPERATING EXPENSES |  |
Total consolidated operating expenses | $ (31,426) | $ (26,476)

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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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