Acquisitions - Schedule of Supplemental Pro Forma Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Applied Sciences Consulting, Inc.
Business Acquisition [Line Items]
Pro forma Revenue	$ 6,371,493	$ 6,756,823
Pro forma Net Income including noncontrolling interests	310,257	289,861
Chesapeake Technology International, Corp
Business Acquisition [Line Items]
Pro forma Revenue	6,419,805	6,840,001
Pro forma Net Income including noncontrolling interests	312,214	278,473
TRS Group, Inc.
Business Acquisition [Line Items]
Pro forma Revenue	6,366,268	6,779,739
Pro forma Net Income including noncontrolling interests	$ 309,913	287,387
BCC Engineering, LLC
Business Acquisition [Line Items]
Pro forma Revenue		6,838,190	$ 5,537,090
Pro forma Net Income including noncontrolling interests		286,948	189,200
BlackSignal Technologies, LLC.
Business Acquisition [Line Items]
Pro forma Revenue		6,782,552	5,481,036
Pro forma Net Income including noncontrolling interests		$ 283,900	185,954
Sealing Technologies, Inc.
Business Acquisition [Line Items]
Pro forma Revenue			5,525,099
Pro forma Net Income including noncontrolling interests			216,157
IPKeys Power Partners
Business Acquisition [Line Items]
Pro forma Revenue			5,445,604
Pro forma Net Income including noncontrolling interests			$ 209,773