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OPERATING SEGMENT DATA - Operating expenses (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
OPERATING EXPENSES |  |
Salaries, wages, and benefits | $ 420,643 | $ 359,395
Fuel, supplies, and expenses | 99,547 | 73,149
Depreciation and amortization | 34,823 | 30,354
Other | 38,254 | 24,786
Total consolidated operating expenses | 1,240,146 | 797,022
Operating Segments | Asset Based |  |
OPERATING EXPENSES |  |
Salaries, wages, and benefits | 313,497 | 285,694
Fuel, supplies, and expenses | 84,831 | 60,841
Operating taxes and licenses | 12,493 | 12,248
Insurance | 10,431 | 8,939
Communications and utilities | 4,687 | 4,970
Depreciation and amortization | 24,305 | 23,484
Rents and purchased transportation | 102,985 | 75,588
Shared services | 67,150 | 55,866
Gain on sale of property and equipment | (2,695) | (8,695)
Innovative technology costs | 6,960 | 6,868
Other | 633 | 434
Total consolidated operating expenses | 625,277 | 526,237
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 | 508,380 | 210,995
Supplies and expenses | 3,266 | 2,568
Depreciation and amortization | 5,180 | 2,386
Shared services | 50,197 | 26,072
Other | 7,145 | 2,050
Total consolidated operating expenses | 574,168 | 244,071
Operating Segments | FleetNet |  |
OPERATING EXPENSES |  |
Total consolidated operating expenses | 76,661 | 58,140
Other and eliminations |  |
OPERATING EXPENSES |  |
Total consolidated operating expenses | $ (35,960) | $ (31,426)

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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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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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