Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2024

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	2024				2023				2024				2023
Mechanical Segment	$	1,451,679	80.2	%	$	975,923	75.3	%	$	2,636,688	78.8	%	$	1,894,538	76.7	%
Electrical Segment		358,611	19.8	%		320,507	24.7	%		710,618	21.2	%		576,532	23.3	%
Total	$	1,810,290	100.0	%	$	1,296,430	100.0	%	$	3,347,306	100.0	%	$	2,471,070	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Type of Customer	2024				2023				2024				2023
Technology	$	561,313	31.0	%	$	265,231	20.5	%	$	1,026,127	30.7	%	$	491,480	19.9	%
Manufacturing		526,215	29.0	%		435,819	33.6	%		987,615	29.5	%		802,175	32.5	%
Education		193,433	10.7	%		127,178	9.8	%		327,416	9.8	%		237,431	9.6	%
Healthcare		140,747	7.8	%		138,384	10.7	%		274,476	8.2	%		298,199	12.1	%
Office Buildings		115,012	6.4	%		95,971	7.4	%		216,904	6.5	%		194,166	7.9	%
Retail, Restaurants and Entertainment		114,501	6.3	%		80,783	6.2	%		195,086	5.8	%		156,977	6.3	%
Government		91,073	5.0	%		77,597	6.0	%		178,874	5.3	%		142,012	5.7	%
Multi-Family and Residential		36,181	2.0	%		46,295	3.6	%		77,032	2.3	%		91,302	3.7	%
Other		31,815	1.8	%		29,172	2.2	%		63,776	1.9	%		57,328	2.3	%
Total	$	1,810,290	100.0	%	$	1,296,430	100.0	%	$	3,347,306	100.0	%	$	2,471,070	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Activity Type	2024				2023				2024				2023
New Construction	$	1,082,272	59.8	%	$	681,912	52.6	%	$	1,981,248	59.2	%	$	1,309,864	53.0	%
Existing Building Construction		446,574	24.7	%		358,807	27.7	%		836,943	25.0	%		668,290	27.1	%
Service Projects		126,280	6.9	%		114,746	8.8	%		230,394	6.9	%		217,851	8.8	%
Service Calls, Maintenance and Monitoring		155,164	8.6	%		140,965	10.9	%		298,721	8.9	%		275,065	11.1	%
Total	$	1,810,290	100.0	%	$	1,296,430	100.0	%	$	3,347,306	100.0	%	$	2,471,070	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, 2024 and December 31, 2023 (in thousands):

	June 30, 2024		December 31, 2023
Contract assets:
Costs and estimated earnings in excess of billings, less allowance for credit losses	$	69,391	$	28,084
Contract liabilities:
Billings in excess of costs and estimated earnings and deferred revenue	$	1,149,896	$	909,538