Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment reporting information
Revenue	$ 1,329,139	$ 1,284,128	$ 1,022,948	$ 784,384	$ 884,448	$ 913,245	$ 881,610	$ 818,329	$ 4,420,599	$ 3,497,632	$ 3,491,497
% of Total Revenue									100.00%	100.00%	100.00%
Gross Profit	$ 153,383	$ 154,907	$ 92,109	$ 56,486	$ 96,017	$ 127,436	$ 113,026	$ 80,181	$ 456,885	$ 416,660	$ 370,214
% of Revenue									10.30%	11.90%	10.60%
Utilities
Segment reporting information
Revenue									$ 2,024,307	$ 1,657,957	$ 1,365,635
% of Total Revenue									45.80%	47.40%	39.10%
Gross Profit									$ 210,672	$ 186,287	$ 177,836
% of Revenue									10.40%	11.20%	13.00%
Energy/Renewables
Segment reporting information
Revenue									$ 2,087,489	$ 1,408,211	$ 1,228,821
% of Total Revenue									47.20%	40.30%	35.20%
Gross Profit									$ 252,872	$ 150,286	$ 94,919
% of Revenue									12.10%	10.70%	7.70%
Pipeline
Segment reporting information
Revenue									$ 308,803	$ 431,464	$ 897,041
% of Total Revenue									7.00%	12.30%	25.70%
Gross Profit									$ (6,659)	$ 80,087	$ 97,459
% of Revenue									(2.20%)	18.60%	10.90%