Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
PROPERTY AND EQUIPMENT
Property and equipment, Gross	$ 721,864		$ 721,864		$ 619,047
Accumulated depreciation	(220,744)		(220,744)		(189,408)
Property and equipment, Net	501,120		501,120		429,639
Depreciation	25,527	$ 16,196	48,815	$ 31,069
Revenue equipment
PROPERTY AND EQUIPMENT
Property and equipment, Gross	618,070		618,070		544,876
Buildings and improvements
PROPERTY AND EQUIPMENT
Property and equipment, Gross	53,271		53,271		53,366
Furniture and fixtures, office and computer equipment and vehicles
PROPERTY AND EQUIPMENT
Property and equipment, Gross	50,523		50,523		$ 20,805
Property and equipment
PROPERTY AND EQUIPMENT
Depreciation	$ 25,500	$ 16,200	$ 48,800	$ 31,100