Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill
Goodwill, Beginning Balance	$ 581,664	$ 215,103
Goodwill acquired during the period	290,144	366,561
Goodwill, Ending Balance	871,808	581,664	$ 215,103
Goodwill impairment	0	0	0
Goodwill changes			0
Utilities
Goodwill
Goodwill, Beginning Balance	462,905	96,344
Goodwill acquired during the period	253,379	366,561
Goodwill, Ending Balance	716,284	462,905	96,344
Energy/Renewables
Goodwill
Goodwill, Beginning Balance	66,344	66,344
Goodwill acquired during the period	17,859
Goodwill, Ending Balance	84,203	66,344	66,344
Pipeline
Goodwill
Goodwill, Beginning Balance	52,415	52,415
Goodwill acquired during the period	18,906
Goodwill, Ending Balance	$ 71,321	$ 52,415	$ 52,415