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Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Revenues	$ 522,325	$ 461,827	$ 925,904	$ 827,789
Operating Income	60,263	43,989	92,890	73,352
Acquisition related costs	(59)	(230)	(249)	(485)
Operating Segments
Segment Reporting Information [Line Items]
Revenues	522,325	461,827	925,904	827,789
Operating Income	66,503	49,985	104,779	85,071
Corporate General and Administrative Expense
Segment Reporting Information [Line Items]
Operating Income	(6,181)	(5,766)	(11,640)	(11,234)
E-Infrastructure Solutions Revenues | Operating Segments
Segment Reporting Information [Line Items]
Revenues	260,148	233,548	465,988	402,475
Operating Income	43,167	32,824	67,436	54,109
Transportation Solutions Revenues | Operating Segments
Segment Reporting Information [Line Items]
Revenues	151,088	142,640	262,227	258,781
Operating Income	9,856	7,410	15,162	11,853
Building Solutions Revenues | Operating Segments
Segment Reporting Information [Line Items]
Revenues	111,089	85,639	197,689	166,533
Operating Income	$ 13,480	$ 9,751	$ 22,181	$ 19,109

X

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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