REVENUE FROM CUSTOMERS - Schedule of Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Revenues	$ 1,168,179	$ 614,468	$ 1,993,854	$ 1,045,417
Lump-Sum
Disaggregation of Revenue [Line Items]
Revenues	741,426	323,186	1,275,360	547,374
Fixed-Unit Price
Disaggregation of Revenue [Line Items]
Revenues	257,339	200,034	457,116	326,596
Residential and Other
Disaggregation of Revenue [Line Items]
Revenues	169,414	91,248	261,378	171,447
E-Infrastructure Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	905,001	310,406
Transportation Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	156,692	196,797
Transportation Solutions Revenues \| Heavy Highway
Disaggregation of Revenue [Line Items]
Revenues	112,681	133,109	202,953	220,307
Transportation Solutions Revenues \| Aviation
Disaggregation of Revenue [Line Items]
Revenues	22,770	15,797	43,952	27,308
Transportation Solutions Revenues \| Other Services
Disaggregation of Revenue [Line Items]
Revenues	21,241	47,891	42,650	69,843
Building Solutions Revenues
Disaggregation of Revenue [Line Items]
Revenues	106,486	107,265
Building Solutions Revenues \| Residential
Disaggregation of Revenue [Line Items]
Revenues	89,748	91,812	168,525	168,578
Building Solutions Revenues \| Commercial
Disaggregation of Revenue [Line Items]
Revenues	$ 16,738	$ 15,453	$ 33,041	$ 30,712