Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contracts with Customers

Schedule of disaggregation of revenue

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

	Three Months Ended September 30,								Nine Months Ended September 30,
Revenue by Service Provided	2023				2022				2023				2022
Mechanical Segment	$	1,031,310	74.8	%	$	858,768	76.7	%	$	2,925,848	76.0	%	$	2,318,036	76.7	%
Electrical Segment		346,814	25.2	%		261,244	23.3	%		923,346	24.0	%		705,140	23.3	%
Total	$	1,378,124	100.0	%	$	1,120,012	100.0	%	$	3,849,194	100.0	%	$	3,023,176	100.0	%
	Three Months Ended September 30,								Nine Months Ended September 30,
Revenue by Type of Customer	2023				2022				2023				2022
Manufacturing	$	469,173	34.0	%	$	376,505	33.6	%	$	1,271,348	33.0	%	$	1,029,647	34.1	%
Technology		303,847	22.0	%		165,717	14.8	%		795,327	20.7	%		393,250	13.0	%
Healthcare		133,130	9.7	%		147,234	13.2	%		431,329	11.2	%		423,142	14.0	%
Education		139,206	10.1	%		133,422	11.9	%		376,637	9.8	%		342,116	11.3	%
Office Buildings		104,937	7.6	%		94,931	8.5	%		299,103	7.8	%		255,963	8.5	%
Retail, Restaurants and Entertainment		77,802	5.6	%		84,354	7.5	%		234,779	6.1	%		230,370	7.6	%
Government		85,220	6.3	%		63,070	5.6	%		227,232	5.9	%		186,747	6.2	%
Multi-Family and Residential		45,523	3.3	%		34,310	3.1	%		136,825	3.5	%		88,924	2.9	%
Other		19,286	1.4	%		20,469	1.8	%		76,614	2.0	%		73,017	2.4	%
Total	$	1,378,124	100.0	%	$	1,120,012	100.0	%	$	3,849,194	100.0	%	$	3,023,176	100.0	%
	Three Months Ended September 30,								Nine Months Ended September 30,
Revenue by Activity Type	2023				2022				2023				2022
New Construction	$	798,289	57.9	%	$	524,122	46.8	%	$	2,108,153	54.8	%	$	1,438,453	47.6	%
Existing Building Construction		305,795	22.2	%		346,683	31.0	%		974,085	25.3	%		910,284	30.1	%
Service Projects		117,202	8.5	%		103,439	9.2	%		335,053	8.7	%		273,663	9.0	%
Service Calls, Maintenance and Monitoring		156,838	11.4	%		145,768	13.0	%		431,903	11.2	%		400,776	13.3	%
Total	$	1,378,124	100.0	%	$	1,120,012	100.0	%	$	3,849,194	100.0	%	$	3,023,176	100.0	%

Schedule of contract assets and liabilities

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

	September 30, 2023		December 31, 2022
Contract assets:
Costs and estimated earnings in excess of billings, less allowance for credit losses	$	32,554	$	27,211
Contract liabilities:
Billings in excess of costs and estimated earnings and deferred revenue	$	775,302	$	548,293