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OPERATING SEGMENT DATA - Operating expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
OPERATING EXPENSES |  |  |  |
Salaries, wages, and benefits | $ 397,116 | $ 363,035 | $ 1,145,657 | $ 1,013,201
Fuel, supplies, and expenses | 82,051 | 61,321 | 235,221 | 187,932
Depreciation and amortization | 30,359 | 30,032 | 90,995 | 88,131
Gain on sale of subsidiaries |  |  | (6,923) |
Other | 36,811 | 33,372 | 89,062 | 94,079
Total consolidated operating expenses | 929,096 | 755,198 | 2,600,792 | 2,055,723
Operating Segments | Asset Based |  |  |  |
OPERATING EXPENSES |  |  |  |
Salaries, wages, and benefits | 305,839 | 287,385 | 893,903 | 820,218
Fuel, supplies, and expenses | 66,947 | 50,144 | 192,477 | 157,044
Operating taxes and licenses | 12,426 | 12,296 | 36,977 | 36,719
Insurance | 10,175 | 8,587 | 28,568 | 24,658
Communications and utilities | 4,559 | 4,373 | 14,192 | 13,426
Depreciation and amortization | 23,233 | 24,054 | 70,025 | 70,651
Rents and purchased transportation | 95,855 | 69,442 | 266,525 | 171,364
Shared services | 71,017 | 60,664 | 196,255 | 155,154
Gain on sale of property and equipment |  | 133 | (8,624) | (3,206)
Innovative technology costs | 6,903 | 6,199 | 21,303 | 15,521
Other | 592 | 1,933 | 1,103 | 5,168
Total consolidated operating expenses | 597,546 | 525,210 | 1,712,704 | 1,466,717
Operating Segments | Asset Based | Land and structures |  |  |  |
OPERATING EXPENSES |  |  |  |
Gain on sale of property and equipment |  |  | (8,600) |
Operating Segments | ArcBest |  |  |  |
OPERATING EXPENSES |  |  |  |
Purchased transportation | 256,900 | 181,129 | 694,498 | 443,401
Supplies and expenses | 2,741 | 2,746 | 7,785 | 7,015
Depreciation and amortization | 2,352 | 2,413 | 7,104 | 7,332
Shared services | 31,048 | 24,217 | 86,198 | 64,784
Gain on sale of subsidiaries |  |  | (6,923) |
Other | 1,984 | 1,958 | 6,055 | 6,279
Total consolidated operating expenses | 295,025 | 212,463 | 794,717 | 528,811
Operating Segments | ArcBest | Land and structures |  |  |  |
OPERATING EXPENSES |  |  |  |
Gain on sale of subsidiaries |  |  | (6,900) |
Operating Segments | FleetNet |  |  |  |
OPERATING EXPENSES |  |  |  |
Total consolidated operating expenses | 65,245 | 49,558 | 181,794 | 146,615
Other and eliminations |  |  |  |
OPERATING EXPENSES |  |  |  |
Total consolidated operating expenses | $ (28,720) | $ (32,033) | $ (88,423) | $ (86,420)

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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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