REVENUE FROM CUSTOMERS - Schedule of Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Revenues	$ 1,563,927	$ 689,019	$ 3,557,781	$ 1,734,436
Lump-Sum
Disaggregation of Revenue [Line Items]
Revenues	976,016	418,815	2,251,376	966,189
Fixed-Unit Price
Disaggregation of Revenue [Line Items]
Revenues	295,351	188,904	752,467	515,500
Residential and Other
Disaggregation of Revenue [Line Items]
Revenues	292,560	81,300	553,938	252,747
E-Infrastructure Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	1,302,739	417,106	2,805,472	945,775
Transportation Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	165,224	170,490	454,779	487,948
Transportation Solutions Revenues \| Heavy Highway
Disaggregation of Revenue [Line Items]
Revenues	115,634	105,710	318,587	326,017
Transportation Solutions Revenues \| Aviation
Disaggregation of Revenue [Line Items]
Revenues	24,506	18,855	68,458	46,163
Transportation Solutions Revenues \| Other Services
Disaggregation of Revenue [Line Items]
Revenues	25,084	45,925	67,734	115,768
Building Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	95,964	101,423	297,530	300,713
Building Solutions Revenues \| Residential
Disaggregation of Revenue [Line Items]
Revenues	74,364	80,529	242,889	249,107
Building Solutions Revenues \| Commercial
Disaggregation of Revenue [Line Items]
Revenues	$ 21,600	$ 20,894	$ 54,641	$ 51,606