Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2022

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	2022				2021				2022				2021
Mechanical Services	$	776,757	76.3	%	$	611,796	85.7	%	$	1,459,268	76.7	%	$	1,177,416	85.1	%
Electrical Services		241,191	23.7	%		102,099	14.3	%		443,896	23.3	%		206,240	14.9	%
Total	$	1,017,948	100.0	%	$	713,895	100.0	%	$	1,903,164	100.0	%	$	1,383,656	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Type of Customer	2022				2021				2022				2021
Industrial	$	470,491	46.2	%	$	311,075	43.6	%	$	880,675	46.3	%	$	580,658	42.0	%
Education		119,248	11.7	%		92,381	12.9	%		208,694	11.0	%		184,838	13.4	%
Office Buildings		85,917	8.4	%		73,014	10.2	%		161,032	8.5	%		152,010	11.0	%
Healthcare		141,113	13.9	%		96,004	13.4	%		275,908	14.5	%		191,095	13.8	%
Government		66,212	6.5	%		42,506	6.0	%		123,677	6.5	%		85,671	6.2	%
Retail, Restaurants and Entertainment		80,434	7.9	%		48,933	6.9	%		146,016	7.7	%		93,509	6.7	%
Multi-Family and Residential		30,172	3.0	%		28,341	4.0	%		54,614	2.8	%		53,001	3.8	%
Other		24,361	2.4	%		21,641	3.0	%		52,548	2.7	%		42,874	3.1	%
Total	$	1,017,948	100.0	%	$	713,895	100.0	%	$	1,903,164	100.0	%	$	1,383,656	100.0	%
	Three Months Ended June 30,								Six Months Ended June 30,
Revenue by Activity Type	2022				2021				2022				2021
New Construction	$	484,913	47.7	%	$	329,890	46.2	%	$	914,331	48.1	%	$	631,951	45.7	%
Existing Building Construction		304,316	29.9	%		215,317	30.2	%		563,601	29.6	%		431,918	31.2	%
Service Projects		93,972	9.2	%		66,263	9.3	%		170,224	8.9	%		126,323	9.1	%
Service Calls, Maintenance and Monitoring		134,747	13.2	%		102,425	14.3	%		255,008	13.4	%		193,464	14.0	%
Total	$	1,017,948	100.0	%	$	713,895	100.0	%	$	1,903,164	100.0	%	$	1,383,656	100.0	%

Schedule of contract assets and liabilities

	Six Months Ended June 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		31		—		(5)		—
Other changes in the period		(16,728)		86,977		927		44,620
Balance at end of period	$	15,629	$	395,517	$	29,900	$	307,380