Business Combinations - Summary of Fair Value of Consideration Transferred (Details) € in Thousands, $ in Thousands				2 Months Ended	9 Months Ended
	Aug. 04, 2025 USD ($)	May 14, 2025 USD ($)	Jul. 30, 2024 EUR (€)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	May 14, 2025 EUR (€)	Dec. 31, 2024 USD ($)
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill					$ 1,564,370		$ 845,939
ASP Acuren Acquisition
Business Combination, Separately Recognized Transaction [Line Items]
Cash consideration | €			€ 1,871,642
Equity consideration | €			4,000
Total consideration | €			1,875,642
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents | €			49,456
Accounts receivables, net | €			270,849
Prepaid and other current assets | €			9,302
Property and equipment | €			199,760
Lease assets | €			27,530
Other assets | €			13,674
Deferred tax assets | €			813
Intangible assets | €			775,000
Accounts payable | €			(17,035)
Accrued expenses and other current liabilities | €			(76,446)
Deferred tax liabilities | €			(167,944)
Other liabilities | €			(20,016)
Lease obligations | €			(54,900)
Total identifiable net assets acquired | €			1,010,043
Goodwill | €			€ 865,599
NV5 Global, Inc.
Business Combination, Separately Recognized Transaction [Line Items]
Cash consideration		$ 870,911
Equity consideration		768,304		$ 4,000	$ 798,048
Replacement of share-based awards	$ 76,500	29,744
Total consideration		1,668,959
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and cash equivalents		59,022
Accounts receivables, net		186,228
Contract assets		123,428
Prepaid and other current assets		31,508
Property and equipment		79,806
Other assets		4,560
Operating lease right-of-use assets		34,094
Intangible assets		821,900
Accounts payable		(40,350)
Accrued expenses and other current liabilities		(78,586)
Contract liabilities		(47,694)
Deferred tax liabilities | €						€ (128,868)
Other liabilities		(21,825)
Income tax payable		(2,521)
Lease obligations		(39,908)
Total identifiable net assets acquired		980,794
Goodwill		$ 688,165