Business Combinations - Narrative (Details) € in Thousands, $ in Thousands, shares in Millions					1 Months Ended	2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended
	Aug. 04, 2025 USD ($)	May 14, 2025 USD ($) shares	Jul. 30, 2024 USD ($)	Jul. 30, 2024 EUR (€)	Jul. 29, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Jul. 29, 2024 USD ($) business	Sep. 30, 2025 USD ($) business	Dec. 31, 2024 USD ($)	Jul. 30, 2024 EUR (€)
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							$ 1,564,370		$ 1,564,370	$ 845,939
Transaction costs						$ 24,554	18,755		19,920
Consulting Engineering
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							330,869		330,869	0
Inspection and Mitigation
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							870,140		870,140	845,939
Geospatial
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							363,361		363,361	$ 0
Predecessor
Business Combination, Separately Recognized Transaction [Line Items]
Transaction costs					$ 5,204			$ 5,204
Acuren British Virgin Islands \| Acuren British Virgin Islands
Business Combination, Separately Recognized Transaction [Line Items]
Fair value of investment by Acuren BVI			$ 4,000
NV5 Global, Inc.
Business Combination, Separately Recognized Transaction [Line Items]
Total consideration		$ 1,668,959
Cash paid to acquire business		$ 870,911
Number of shares issued (in shares) \| shares		73.2
Equity consideration		$ 768,304				4,000			798,048
Replacement of share-based awards	$ 76,500	29,744
Debt issuance costs		21,900
Goodwill		688,165
Goodwill expected to be tax deductible		76,100
Revenue for the period							180,700		180,700
Income before income tax provision							8,200		8,200
Transaction costs		18,400
NV5 Global, Inc. \| Revolving credit facility
Business Combination, Separately Recognized Transaction [Line Items]
Debt issuance costs		1,300
Increase in existing senior secured revolving credit facility		125,000
NV5 Global, Inc. \| Revolving credit facility \| Line of Credit
Business Combination, Separately Recognized Transaction [Line Items]
Long-term debt		875,000
NV5 Global, Inc. \| Consulting Engineering
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill		330,900
NV5 Global, Inc. \| Geospatial
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill		$ 357,300
NV5 Global, Inc. \| Predecessor
Business Combination, Separately Recognized Transaction [Line Items]
Equity consideration								0
NV5 Global, Inc. \| Customer relationships
Business Combination, Separately Recognized Transaction [Line Items]
Weighted average  remaining  life (in years)		15 years
NV5 Global, Inc. \| Customer backlog
Business Combination, Separately Recognized Transaction [Line Items]
Weighted average  remaining  life (in years)		2 years
NV5 Global, Inc. \| Tradenames
Business Combination, Separately Recognized Transaction [Line Items]
Weighted average  remaining  life (in years)		10 years
NV5 Global, Inc. \| Developed technology
Business Combination, Separately Recognized Transaction [Line Items]
Weighted average  remaining  life (in years)		3 years
2025 Business Acquisitions
Business Combination, Separately Recognized Transaction [Line Items]
Cash paid to acquire business									34,200
Goodwill							13,400		13,400
Revenue for the period							5,900		$ 8,900
Number of businesses acquired \| business									4
2025 Business Acquisitions \| Inspection and Mitigation
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							7,300		$ 7,300
2025 Business Acquisitions \| Geospatial
Business Combination, Separately Recognized Transaction [Line Items]
Goodwill							$ 6,100		$ 6,100
ASP Acuren Acquisition
Business Combination, Separately Recognized Transaction [Line Items]
Total consideration \| €				€ 1,875,642
Cash paid to acquire business \| €				1,871,642
Equity consideration \| €				€ 4,000
Goodwill \| €											€ 865,599
Post-closing escrow amount returned to buyers			5,200
Measurement period net working capital adjustment and settlement			$ 400
Three Company \| Predecessor
Business Combination, Separately Recognized Transaction [Line Items]
Cash paid to acquire business								47,600
Goodwill						$ 22,200
Revenue for the period					$ 2,700			$ 9,800
Number of businesses acquired \| business								3

TIC Solutions, Inc. 10-Q