Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2022

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	2022				2021				2022				2021
Mechanical Services	$	858,768	76.7	%	$	690,680	82.8	%	$	2,318,036	76.7	%	$	1,868,096	84.2	%
Electrical Services		261,244	23.3	%		143,216	17.2	%		705,140	23.3	%		349,456	15.8	%
Total	$	1,120,012	100.0	%	$	833,896	100.0	%	$	3,023,176	100.0	%	$	2,217,552	100.0	%
	Three Months Ended September 30,								Nine Months Ended September 30,
Revenue by Type of Customer	2022				2021				2022				2021
Industrial	$	542,222	48.4	%	$	379,605	45.5	%	$	1,422,897	47.1	%	$	960,263	43.3	%
Education		133,422	11.9	%		115,536	13.9	%		342,116	11.3	%		300,374	13.5	%
Office Buildings		94,931	8.5	%		77,806	9.3	%		255,963	8.5	%		229,816	10.4	%
Healthcare		147,234	13.2	%		101,446	12.2	%		423,142	14.0	%		292,541	13.2	%
Government		63,070	5.6	%		40,268	4.8	%		186,747	6.2	%		125,939	5.7	%
Retail, Restaurants and Entertainment		84,354	7.5	%		62,365	7.5	%		230,370	7.6	%		155,874	7.0	%
Multi-Family and Residential		34,310	3.1	%		29,741	3.6	%		88,924	2.9	%		82,742	3.7	%
Other		20,469	1.8	%		27,129	3.2	%		73,017	2.4	%		70,003	3.2	%
Total	$	1,120,012	100.0	%	$	833,896	100.0	%	$	3,023,176	100.0	%	$	2,217,552	100.0	%
	Three Months Ended September 30,								Nine Months Ended September 30,
Revenue by Activity Type	2022				2021				2022				2021
New Construction	$	524,122	46.8	%	$	397,446	47.6	%	$	1,438,453	47.6	%	$	1,029,397	46.4	%
Existing Building Construction		346,683	31.0	%		250,893	30.1	%		910,284	30.1	%		682,811	30.8	%
Service Projects		103,439	9.2	%		75,525	9.1	%		273,663	9.0	%		201,848	9.1	%
Service Calls, Maintenance and Monitoring		145,768	13.0	%		110,032	13.2	%		400,776	13.3	%		303,496	13.7	%
Total	$	1,120,012	100.0	%	$	833,896	100.0	%	$	3,023,176	100.0	%	$	2,217,552	100.0	%

Schedule of contract assets and liabilities

	Nine Months Ended September 30,					Year Ended December 31,
	2022				2021
	Contract		Contract		Contract		Contract
	Assets		Liabilities		Assets		Liabilities
Balance at beginning of period	$	29,900	$	307,380	$	18,622	$	226,237
Change due to acquisitions / disposals		2,426		1,160		10,356		36,523
Change related to credit allowance		17		—		(5)		—
Other changes in the period		(10,643)		126,216		927		44,620
Balance at end of period	$	21,700	$	434,756	$	29,900	$	307,380