Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed on Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Aug. 16, 2024	Dec. 31, 2023	Aug. 23, 2023	Apr. 13, 2023
Business Acquisition [Line Items]
Contract assets	$ 790,001		$ 757,515
Goodwill	1,931,157		1,792,665
Investments in and advances to unconsolidated joint ventures	194,524		128,204
Contract liabilities	$ (300,799)		$ (301,107)
BlackSignal Technologies, LLC.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 4,917
Accounts receivable		5,171
Contract assets		3,209
Income taxes receivable		234
Prepaid expenses and other current assets		433
Property and equipment		997
Right of use assets, operating leases		3,032
Goodwill		139,394
Intangible assets		73,200
Other assets		145
Accounts payable		(951)
Accrued expenses and other current liabilities		(4,793)
Short-term lease liabilities, operating leases		(593)
Deferred income taxes		(17,978)
Long-term lease liabilities, operating leases		(2,651)
Net assets acquired		$ 203,766
Sealing Technologies, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents				$ 8,133
Accounts receivable				17,889
Contract assets				2,946
Prepaid expenses and other current assets				1,379
Property and equipment				2,025
Right of use assets, operating leases				1,836
Deferred tax assets				357
Goodwill				90,593
Intangible assets				75,000
Accounts payable				(15,987)
Accrued expenses and other current liabilities				(2,408)
Contract liabilities				(668)
Short-term lease liabilities, operating leases				(418)
Long-term lease liabilities, operating leases				(1,418)
Net assets acquired				$ 179,259
IPKeys Power Partners
Business Acquisition [Line Items]
Cash and cash equivalents					$ 126
Accounts receivable					3,937
Contract assets					834
Prepaid expenses and other current assets					455
Property and equipment					86
Right of use assets, operating leases					1,105
Goodwill					22,407
Intangible assets					23,000
Other noncurrent assets					152
Accounts payable					(541)
Accrued expenses and other current liabilities					(1,768)
Contract liabilities					(1,936)
Short-term lease liabilities, operating leases					(343)
Deferred tax liabilities					(3,713)
Long-term lease liabilities, operating leases					(762)
Net assets acquired					$ 43,039