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Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 239,244	$ 161,133
Less accumulated depreciation	(123,214)	(109,134)
Property and equipment, net	116,030	51,999
Construction and transportation equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	217,945	144,630
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,641	11,072
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,891	2,720
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,767	$ 2,711

X

- Definition

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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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.

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