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Property and Equipment
 9 Months Ended
Sep. 30, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment
7.PROPERTY AND EQUIPMENT
Property and equipment are summarized as follows:
September 30,
2022		December 31,
2021
Construction and transportation equipment$356,276 $316,381 
Buildings and improvements25,581 24,042 
Land3,891 3,891 
Office equipment3,498 3,270 
Total property and equipment389,246 347,584 
Less accumulated depreciation(166,599)(143,268)
Total property and equipment, net$222,647 $204,316 
Depreciation Expense—Depreciation expense is primarily included within cost of revenues and was $9,629 and $27,959 for the three and nine months ended September 30, 2022, respectively, and $5,763 and $16,738 for the three and nine months ended September 30, 2021, respectively.