Segment Reporting - Summary of Financial Information For each of the Company’s Reportable Segments (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Jul. 29, 2024	Sep. 30, 2024	Dec. 31, 2024	Jul. 29, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenue			$ 463,527	$ 633,866	$ 1,530,296		$ 1,050,057
Cost of revenue			359,848	471,881	1,080,937		810,534
Gross profit			103,679	161,985	449,359		239,523
Depreciation and amortization		$ 47,313	47,313	45,777	178,330		94,818
Total assets			2,207,739		4,396,309	$ 2,207,739
Long-lived assets			189,233		$ 255,625	$ 189,233
United States | Geographic Concentration Risk | Property And Equipment Location Benchmark
Segment Reporting Information [Line Items]
Concentration risk, percentage					70.20%	63.10%
Canada | Geographic Concentration Risk | Property And Equipment Location Benchmark
Segment Reporting Information [Line Items]
Concentration risk, percentage					28.60%	36.90%
Predecessor
Segment Reporting Information [Line Items]
Revenue	$ 633,866						1,050,057
Cost of revenue	471,881						810,534
Gross profit	161,985						239,523
Depreciation and amortization				45,777			94,818
Operating Segments
Segment Reporting Information [Line Items]
Revenue			463,527		$ 1,530,296
Operating Segments | United States
Segment Reporting Information [Line Items]
Revenue			266,831		984,029
Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenue			196,696		488,132
Operating Segments | Predecessor
Segment Reporting Information [Line Items]
Revenue	633,866			633,866			1,050,057
Operating Segments | Predecessor | United States
Segment Reporting Information [Line Items]
Revenue	363,119						643,492
Operating Segments | Predecessor | Canada
Segment Reporting Information [Line Items]
Revenue	270,747						406,565
Corporate and Eliminations
Segment Reporting Information [Line Items]
Revenue			0	0	0		0
Cost of revenue			0	0	0		0
Gross profit			0	0	0		0
Depreciation and amortization			(21,794)	(23,432)	(105,373)		(39,416)
Total assets			(176,808)		(577,984)	$ (176,808)
Long-lived assets			0		(27,044)	0
Inspection and Mitigation | Predecessor
Segment Reporting Information [Line Items]
Revenue							1,050,057
Inspection and Mitigation | Operating Segments
Segment Reporting Information [Line Items]
Revenue			463,527	633,866	1,098,888		1,050,057
Cost of revenue			359,848	471,881	858,304		810,534
Gross profit			103,679	161,985	240,584		239,523
Depreciation and amortization			25,519	22,345	65,182		55,402
Total assets			2,030,931		2,011,756	2,030,931
Long-lived assets			189,233		172,858	189,233
Inspection and Mitigation | Operating Segments | United States
Segment Reporting Information [Line Items]
Revenue			266,831		601,105
Inspection and Mitigation | Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenue			196,696		487,283
Inspection and Mitigation | Operating Segments | Predecessor
Segment Reporting Information [Line Items]
Revenue	633,866			633,866			1,050,057
Inspection and Mitigation | Operating Segments | Predecessor | United States
Segment Reporting Information [Line Items]
Revenue	363,119						643,492
Inspection and Mitigation | Operating Segments | Predecessor | Canada
Segment Reporting Information [Line Items]
Revenue	270,747						406,565
Consulting Engineering | Predecessor
Segment Reporting Information [Line Items]
Revenue							0
Consulting Engineering | Operating Segments
Segment Reporting Information [Line Items]
Revenue			0	0	300,145		0
Cost of revenue			0	0	157,660		0
Gross profit			0	0	142,485		0
Depreciation and amortization			0	0	3,040		0
Total assets			0		1,173,971	0
Long-lived assets			0		10,702	0
Consulting Engineering | Operating Segments | United States
Segment Reporting Information [Line Items]
Revenue			0		260,270
Consulting Engineering | Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenue			0		0
Consulting Engineering | Operating Segments | Predecessor
Segment Reporting Information [Line Items]
Revenue	0			0			0
Consulting Engineering | Operating Segments | Predecessor | United States
Segment Reporting Information [Line Items]
Revenue	0						0
Consulting Engineering | Operating Segments | Predecessor | Canada
Segment Reporting Information [Line Items]
Revenue	0						0
Geospatial | Predecessor
Segment Reporting Information [Line Items]
Revenue							0
Geospatial | Operating Segments
Segment Reporting Information [Line Items]
Revenue			0	0	131,263		0
Cost of revenue			0	0	64,973		0
Gross profit			0	0	66,290		0
Depreciation and amortization			0	0	4,735		0
Total assets			0		632,598	0
Long-lived assets			0		45,021	$ 0
Geospatial | Operating Segments | United States
Segment Reporting Information [Line Items]
Revenue			0		122,654
Geospatial | Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenue			$ 0		$ 849
Geospatial | Operating Segments | Predecessor
Segment Reporting Information [Line Items]
Revenue	0			$ 0			0
Geospatial | Operating Segments | Predecessor | United States
Segment Reporting Information [Line Items]
Revenue	0						0
Geospatial | Operating Segments | Predecessor | Canada
Segment Reporting Information [Line Items]
Revenue	$ 0						$ 0