Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue
Revenue	$ 4,140,364	$ 3,073,636	$ 2,856,659
Percentage of revenue from contract with customer (as a percent)	100.00%	100.00%	100.00%
Industrial
Disaggregation of Revenue
Revenue	$ 1,973,252	$ 1,356,688	$ 1,112,075
Percentage of revenue from contract with customer (as a percent)	47.70%	44.10%	38.90%
Healthcare
Disaggregation of Revenue
Revenue	$ 584,023	$ 417,901	$ 371,105
Percentage of revenue from contract with customer (as a percent)	14.10%	13.60%	13.00%
Education
Disaggregation of Revenue
Revenue	$ 445,638	$ 390,251	$ 487,922
Percentage of revenue from contract with customer (as a percent)	10.80%	12.70%	17.10%
Office Buildings
Disaggregation of Revenue
Revenue	$ 349,235	$ 308,799	$ 319,426
Percentage of revenue from contract with customer (as a percent)	8.40%	10.10%	11.20%
Retail, Restaurants and Entertainment
Disaggregation of Revenue
Revenue	$ 311,697	$ 213,386	$ 239,541
Percentage of revenue from contract with customer (as a percent)	7.50%	6.90%	8.40%
Government
Disaggregation of Revenue
Revenue	$ 255,314	$ 174,813	$ 163,717
Percentage of revenue from contract with customer (as a percent)	6.20%	5.70%	5.70%
Multi-Family and Residential
Disaggregation of Revenue
Revenue	$ 126,339	$ 112,779	$ 86,799
Percentage of revenue from contract with customer (as a percent)	3.00%	3.70%	3.00%
Other
Disaggregation of Revenue
Revenue	$ 94,866	$ 99,019	$ 76,074
Percentage of revenue from contract with customer (as a percent)	2.30%	3.20%	2.70%
New Construction
Disaggregation of Revenue
Revenue	$ 2,011,992	$ 1,421,784	$ 1,333,739
Percentage of revenue from contract with customer (as a percent)	48.60%	46.30%	46.70%
Existing Building Construction
Disaggregation of Revenue
Revenue	$ 1,210,512	$ 963,461	$ 910,807
Percentage of revenue from contract with customer (as a percent)	29.20%	31.30%	31.90%
Service Projects
Disaggregation of Revenue
Revenue	$ 382,155	$ 278,582	$ 241,402
Percentage of revenue from contract with customer (as a percent)	9.20%	9.10%	8.40%
Service Calls, Maintenance and Monitoring
Disaggregation of Revenue
Revenue	$ 535,705	$ 409,809	$ 370,711
Percentage of revenue from contract with customer (as a percent)	13.00%	13.30%	13.00%
Mechanical Services
Disaggregation of Revenue
Revenue	$ 3,178,475	$ 2,542,623	$ 2,430,632
Percentage of revenue from contract with customer (as a percent)	76.80%	82.70%	85.10%
Electrical Services
Disaggregation of Revenue
Revenue	$ 961,889	$ 531,013	$ 426,027
Percentage of revenue from contract with customer (as a percent)	23.20%	17.30%	14.90%