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OPERATING SEGMENT DATA - Operating expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
OPERATING EXPENSES |  |  |  |
Salaries, wages, and benefits | $ 389,146 | $ 305,220 | $ 748,541 | $ 650,166
Fuel, supplies, and expenses | 80,020 | 54,838 | 153,169 | 126,611
Depreciation and amortization | 30,282 | 29,086 | 60,636 | 58,099
Gain on sale of subsidiaries |  |  | (6,923) |
Other | 27,466 | 29,887 | 52,252 | 60,707
Total consolidated operating expenses | 874,674 | 606,945 | 1,671,696 | 1,300,525
Operating Segments | Asset Based |  |  |  |
OPERATING EXPENSES |  |  |  |
Salaries, wages, and benefits | 302,370 | 248,995 | 588,064 | 532,833
Fuel, supplies, and expenses | 64,689 | 45,675 | 125,530 | 106,900
Operating taxes and licenses | 12,303 | 11,629 | 24,551 | 24,423
Insurance | 9,454 | 8,247 | 18,393 | 16,071
Communications and utilities | 4,663 | 4,342 | 9,633 | 9,053
Depreciation and amortization | 23,308 | 23,327 | 46,792 | 46,597
Rents and purchased transportation | 95,082 | 46,152 | 170,670 | 101,922
Shared services | 69,372 | 45,605 | 125,238 | 94,490
Gain on sale of property and equipment | 71 | (1,175) | (8,624) | (3,339)
Innovative technology costs | 7,532 | 4,789 | 14,400 | 9,322
Other | 77 | 1,448 | 511 | 3,235
Total consolidated operating expenses | 588,921 | 439,034 | 1,115,158 | 941,507
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 | 226,603 | 125,090 | 437,598 | 262,272
Supplies and expenses | 2,476 | 1,989 | 5,044 | 4,269
Depreciation and amortization | 2,366 | 2,449 | 4,752 | 4,919
Shared services | 29,078 | 18,840 | 55,150 | 40,567
Gain on sale of subsidiaries | (6,923) |  | (6,923) |
Other | 2,021 | 1,796 | 4,071 | 4,321
Total consolidated operating expenses | 255,621 | 150,164 | 499,692 | 316,348
Operating Segments | ArcBest | Land and structures (service centers) |  |  |  |
OPERATING EXPENSES |  |  |  |
Gain on sale of subsidiaries | (6,900) |  | (6,900) |
Operating Segments | FleetNet |  |  |  |
OPERATING EXPENSES |  |  |  |
Total consolidated operating expenses | 58,409 | 45,658 | 116,549 | 97,057
Other and eliminations |  |  |  |
OPERATING EXPENSES |  |  |  |
Total consolidated operating expenses | $ (28,277) | $ (27,911) | $ (59,703) | $ (54,387)

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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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