Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed on Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Nov. 01, 2024	Aug. 16, 2024	Dec. 31, 2023	Aug. 23, 2023	Apr. 13, 2023	Dec. 31, 2022	May 31, 2022
Business Acquisition [Line Items]
Contract assets	$ 741,504			$ 757,515
Goodwill	2,082,680			1,792,665			$ 1,661,850
Investments in and advances to unconsolidated joint ventures	138,759			128,204
Contract liabilities	$ (289,799)			$ (301,107)
BCC Engineering, LLC
Business Acquisition [Line Items]
Cash and cash equivalents		$ 2,839
Accounts receivable		24,142
Contract assets		16,649
Prepaid expenses and other current assets		2,483
Right of use assets, operating leases		9,438
Property and equipment		1,586
Goodwill		174,532
Intangible assets		32,400
Other noncurrent assets		1,743
Accounts payable		(8,668)
Accrued expenses and other current liabilities		(7,236)
Contract liabilities		(4,446)
Short-term lease liabilities, operating leases		(1,977)
Deferred income taxes		(2,203)
Long-term lease liabilities, operating leases		(7,462)
Other long-term liabilities		(1,155)
Net assets acquired		$ 232,665
BlackSignal Technologies, LLC.
Business Acquisition [Line Items]
Cash and cash equivalents			$ 4,917
Accounts receivable			5,171
Contract assets			3,209
Prepaid expenses and other current assets			447
Right of use assets, operating leases			5,370
Property and equipment			997
Goodwill			119,663
Intangible assets			97,600
Other assets			145
Accounts payable			(951)
Accrued expenses and other current liabilities			(4,999)
Short-term lease liabilities, operating leases			(800)
Deferred income taxes			(22,461)
Long-term lease liabilities, operating leases			(4,570)
Net assets acquired			$ 203,738
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
Right of use assets, operating leases					1,836
Property and equipment					2,025
Goodwill					90,593
Deferred tax assets					357
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
Right of use assets, operating leases						1,105
Property and equipment						86
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)
Long-term lease liabilities, operating leases						(762)
Deferred tax liabilities						(3,713)
Net assets acquired						$ 43,039
Xator Corporation
Business Acquisition [Line Items]
Cash and cash equivalents								$ 8,935
Accounts receivable								7,393
Contract assets								24,332
Prepaid expenses and other current assets								3,615
Right of use assets, operating leases								7,517
Property and equipment								1,699
Goodwill								257,934
Investments in and advances to unconsolidated joint ventures								698
Intangible assets								123,500
Other noncurrent assets								9,156
Accounts payable								(6,626)
Accrued expenses and other current liabilities								(31,309)
Contract liabilities								(2,631)
Short-term lease liabilities, operating leases								(2,371)
Long-term lease liabilities, operating leases								(5,146)
Other long-term liabilities								(9,156)
Net assets acquired								$ 387,540