SEGMENT REPORTING - Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information
Operating revenue	$ 126,773	$ 133,974
Operating income	(2,312)	3,921
Depreciation and amortization	10,011	8,818
Trucking
Segment Reporting Information
Operating revenue	93,000	94,561
USAT Logistics
Segment Reporting Information
Operating revenue	33,773	39,413
Operating Segments \| Trucking
Segment Reporting Information
Operating revenue	93,994	94,902
Operating income	(1,688)	1,609
Depreciation and amortization	9,776	8,579
Operating Segments \| USAT Logistics
Segment Reporting Information
Operating revenue	35,825	41,449
Operating income	(624)	2,312
Depreciation and amortization	235	239
Intersegment Eliminations
Segment Reporting Information
Operating revenue	(3,046)	(2,377)
Intersegment Eliminations \| Trucking
Segment Reporting Information
Operating revenue	(994)	(341)
Intersegment Eliminations \| USAT Logistics
Segment Reporting Information
Operating revenue	(2,052)	(2,036)
Foreign countries \| Operating Segments \| Trucking
Segment Reporting Information
Operating revenue	$ 8,600	$ 9,500

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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