Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contracts with Customers

Schedule of disaggregation of revenue

See details in the following tables (dollars in thousands):

	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Service Provided	2023				2022				2023				2022
Mechanical Services	$	975,923	75.3	%	$	776,757	76.3	%	$	1,894,538	76.7	%	$	1,459,268	76.7	%
Electrical Services		320,507	24.7	%		241,191	23.7	%		576,532	23.3	%		443,896	23.3	%
Total	$	1,296,430	100.0	%	$	1,017,948	100.0	%	$	2,471,070	100.0	%	$	1,903,164	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Type of Customer	2023				2022				2023				2022
Manufacturing	$	435,819	33.6	%	$	338,413	33.2	%	$	802,175	32.5	%	$	653,142	34.3	%
Technology		265,231	20.5	%		132,078	13.0	%		491,480	19.9	%		227,533	12.0	%
Healthcare		138,384	10.7	%		141,113	13.9	%		298,199	12.1	%		275,908	14.5	%
Education		127,178	9.8	%		119,248	11.7	%		237,431	9.6	%		208,694	11.0	%
Office Buildings		95,971	7.4	%		85,917	8.4	%		194,166	7.9	%		161,032	8.5	%
Retail, Restaurants and Entertainment		80,783	6.2	%		80,434	7.9	%		156,977	6.3	%		146,016	7.7	%
Government		77,597	6.0	%		66,212	6.5	%		142,012	5.7	%		123,677	6.5	%
Multi-Family and Residential		46,295	3.6	%		30,172	3.0	%		91,302	3.7	%		54,614	2.8	%
Other		29,172	2.2	%		24,361	2.4	%		57,328	2.3	%		52,548	2.7	%
Total	$	1,296,430	100.0	%	$	1,017,948	100.0	%	$	2,471,070	100.0	%	$	1,903,164	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Activity Type	2023				2022				2023				2022
New Construction	$	681,912	52.6	%	$	484,913	47.7	%	$	1,309,864	53.0	%	$	914,331	48.1	%
Existing Building Construction		358,807	27.7	%		304,316	29.9	%		668,290	27.1	%		563,601	29.6	%
Service Projects		114,746	8.8	%		93,972	9.2	%		217,851	8.8	%		170,224	8.9	%
Service Calls, Maintenance and Monitoring		140,965	10.9	%		134,747	13.2	%		275,065	11.1	%		255,008	13.4	%
Total	$	1,296,430	100.0	%	$	1,017,948	100.0	%	$	2,471,070	100.0	%	$	1,903,164	100.0	%

Schedule of contract assets and liabilities

Contract assets and liabilities in the Consolidated Balance Sheet consisted of the following amounts as of June 30, 2023 and December 31, 2022 (in thousands):

	June 30, 2023		December 31, 2022
Contract assets:
Costs and estimated earnings in excess of billings, less allowance for credit losses	$	28,554	$	27,211
Contract liabilities:
Billings in excess of costs and estimated earnings and deferred revenue	$	696,371	$	548,293