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SEGMENT INFORMATION
 12 Months Ended
Dec. 31, 2024
Segment Reporting [Abstract]  
SEGMENT INFORMATION
21.SEGMENT INFORMATION
The Company’s internal and public segment reporting are aligned based upon the services offered by its operating segments. The Company’s operations consist of three reportable segments: E-Infrastructure Solutions, Transportation Solutions and Building Solutions. The segment information for the prior periods presented has been recast to conform to the current presentation. The Company’s CODM, which is the Company’s Chief Executive Officer, uses both segment gross profit and income from operations for each segment predominantly in the annual budget and forecasting process. The CODM considers budget-to-actual variances of both profit measures when making decisions about allocating capital and personnel to the segments. We incur certain expenses at the corporate level that relate to our business as a whole. A portion of these expenses are allocated to our business segments by various methods, but primarily on the basis of usage. The balance of the corporate level expenses are reported in the “Corporate G&A Expense” line, which is primarily comprised of corporate headquarters facility expense, the cost of the executive management team, and other expenses pertaining to certain centralized functions that benefit the entire Company but are not directly attributable to any specific business segment, such as corporate human resources, legal, governance, compliance and finance functions. Total assets held at Corporate primarily include cash and prepaid assets.
The following table presents segment revenues, significant segment expenses, and measures of segment profit or loss for the years ended December 31, 2024, 2023 and 2022:
 Years Ended December 31,
Revenues202420232022
E-Infrastructure Solutions
$923,728 $937,408 $905,277 
Transportation Solutions
783,659 630,908 542,550 
Building Solutions
408,369 403,913 321,609 
Total Revenues$2,115,756 $1,972,229 $1,769,436 
Cost of Revenues
E-Infrastructure Solutions$(668,956)$(746,608)$(737,348)
Transportation Solutions(682,706)(542,033)(481,951)
Building Solutions(337,971)(345,950)(275,570)
Total Cost of Revenues$(1,689,633)$(1,634,591)$(1,494,869)
Gross Profit
E-Infrastructure Solutions$254,772 $190,800 $167,929 
Transportation Solutions100,953 88,875 60,599 
Building Solutions70,398 57,963 46,039 
Total Gross Profit$426,123 $337,638 $274,567 
General and Administrative Expense
E-Infrastructure Solutions$(39,621)$(37,911)$(34,584)
Transportation Solutions(29,221)(29,254)(20,686)
Building Solutions(11,314)(9,105)(7,138)
Segment General and Administrative Expense(80,156)(76,270)(62,408)
Corporate(38,268)(22,433)(24,072)
Total General and Administrative Expense$(118,424)$(98,703)$(86,480)
Intangible Amortization
E-Infrastructure Solutions$(11,792)$(11,892)$(11,892)
Transportation Solutions— — — 
Building Solutions(5,245)(3,334)(2,208)
Total Intangible Amortization$(17,037)$(15,226)$(14,100)
Other Operating Expense, Net
E-Infrastructure Solutions$— $— $— 
Transportation Solutions(20,863)(17,710)(13,290)
Building Solutions(4,756)669 — 
Total Other Operating Expense, Net$(25,619)$(17,041)$(13,290)
Operating Income  
E-Infrastructure Solutions
$203,359 $140,997 $121,453 
Transportation Solutions
50,869 41,911 26,623 
Building Solutions
49,083 46,193 36,693 
Segment Operating Income303,311 229,101 184,769 
Corporate General and Administrative Expense
(38,268)(22,433)(24,072)
Acquisition Related Costs(421)(873)(827)
Total Operating Income$264,622 $205,795 $159,870 
Interest Income (Expense), Net
E-Infrastructure Solutions
$(9)$(9)$(11)
Transportation Solutions
5,086 2,897 558 
Building Solutions
210 — 2 
Segment Interest Income (Expense), Net
5,287 2,888 549 
Corporate
(2,920)(18,068)(20,255)
Total Interest Income (Expense), Net
$2,367 $(15,180)$(19,706)
Gain on deconsolidation of subsidiary, net91,289 — — 
Income before income taxes$358,278 $190,615 $140,164 
The following table presents depreciation by reportable segment for the years ended December 31, 2024, 2023 and 2022:
Years Ended December 31,
Depreciation202420232022
E-Infrastructure Solutions$(34,858)$(30,997)$(26,967)
Transportation Solutions(14,551)(10,195)(8,656)
Building Solutions(1,049)(807)(762)
Corporate(915)(178)(90)
Total Depreciation$(51,373)$(42,177)$(36,475)
The following table presents total assets by reportable segment at December 31, 2024 and 2023:
AssetsDecember 31,
2024		December 31, 2023
E-Infrastructure Solutions
$958,107 $923,643 
Transportation Solutions (1)
178,143 221,601 
Building Solutions
238,776 245,688 
Corporate
641,748 386,252 
Total Assets$2,016,774 $1,777,184 
(1)    The decrease in Transportation Solutions assets in 2024 is primarily due to the deconsolidation of our 50% owned subsidiary, RHB.