Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Project and non-project reserves	$ 23,184	$ 23,555
Employee compensation and benefits	76,944	69,726
Revenue and cost recognition	46,250	37,616
Insurance accruals	12,424	14,081
Net operating losses	17,640	8,663
Lease liabilities	42,572	44,626
Tax credit carryforwards	35,845	31,727
Other	17,432	3,285
Total deferred tax assets	272,291	233,279
Valuation allowance	(45,318)	(34,779)
Total deferred tax assets	226,973	198,500
Deferred tax liabilities
Intangible assets	(57,361)	(18,783)
Right-of-use assets	(38,605)	(40,131)
Profit remittance tax	(6,842)	(5,822)
Other	(1,758)	(3,378)
Total deferred tax liabilities	(104,566)	(68,114)
Net deferred tax asset	$ 122,407	$ 130,386