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Property and Equipment
 6 Months Ended
Jun. 30, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment
7.PROPERTY AND EQUIPMENT
Property and equipment are summarized as follows:
June 30,
2022		December 31,
2021
Construction and transportation equipment$342,504 $316,381 
Buildings and improvements25,366 24,042 
Land3,891 3,891 
Office equipment3,513 3,270 
Total property and equipment375,274 347,584 
Less accumulated depreciation(160,298)(143,268)
Total property and equipment, net$214,976 $204,316 
Depreciation Expense—Depreciation expense is primarily included within cost of revenues and was $10,131 and $18,330 for the three and six months ended June 30, 2022, respectively, and $5,536 and $10,975 for the three and six months ended June 30, 2021, respectively.