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OPERATING SEGMENT DATA - Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
OPERATING INCOME |  |  |  |
Operating income | $ 87,561 | $ 39,782 | $ 194,051 | $ 68,026
OTHER INCOME (COSTS) |  |  |  |
Interest and dividend income | 323 | 756 | 1,037 | 3,122
Interest and other related financing costs | (2,072) | (2,860) | (6,774) | (9,185)
Other, net | 338 | 1,500 | 2,641 | 334
TOTAL OTHER INCOME (COSTS) | (1,411) | (604) | (3,096) | (5,729)
INCOME BEFORE INCOME TAXES | 86,150 | 39,178 | 190,955 | 62,297
Operating Segments | Asset Based |  |  |  |
OPERATING INCOME |  |  |  |
Operating income | 83,618 | 36,646 | 177,584 | 70,922
Operating Segments | ArcBest |  |  |  |
OPERATING INCOME |  |  |  |
Operating income | 10,182 | 4,831 | 33,574 | 4,725
Operating Segments | FleetNet |  |  |  |
OPERATING INCOME |  |  |  |
Operating income | 1,269 | 987 | 3,430 | 2,809
Other and eliminations |  |  |  |
OPERATING INCOME |  |  |  |
Operating income | $ (7,508) | $ (2,682) | $ (20,537) | $ (10,430)

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