Segment Information (Tables)

12 Months Ended

Dec. 31, 2024

Segment Information

Summary of information about reportable segments

	Mechanical Segment		Electrical Segment		Corporate		Consolidated
Total assets at December 31, 2024	$	3,162,677	$	985,006	$	563,405	$	4,711,088
Total assets at December 31, 2023	$	2,180,021	$	901,025	$	224,533	$	3,305,579
	Year Ended December 31, 2024
	Mechanical Segment		Electrical Segment		Corporate		Consolidated
Revenue	$	5,527,604	$	1,499,872	$	—	$	7,027,476
Cost of services		4,413,108		1,137,957		—		5,551,065
Gross profit		1,114,496		361,915		—		1,476,411
Selling, general and administrative expenses		499,441		170,155		60,476		730,072
Gain on sale of assets		(1,813)		(1,217)		—		(3,030)
Operating income	$	616,868	$	192,977	$	(60,476)	$	749,369
Amortization of identifiable intangible assets	$	74,873	$	22,393	$	—	$	97,266
Depreciation expense	$	39,601	$	7,450	$	1,168	$	48,219
Capital expenditures	$	80,957	$	26,850	$	3,264	$	111,071
	Year Ended December 31, 2023
	Mechanical Segment		Electrical Segment		Corporate		Consolidated
Revenue	$	3,946,022	$	1,260,738	$	—	$	5,206,760
Cost of services		3,195,916		1,020,335		—		4,216,251
Gross profit		750,106		240,403		—		990,509
Selling, general and administrative expenses		394,657		129,623		50,143		574,423
Gain on sale of assets		(1,715)		(587)		—		(2,302)
Operating income	$	357,164	$	111,367	$	(50,143)	$	418,388
Amortization of identifiable intangible assets	$	17,619	$	25,785	$	—	$	43,404
Depreciation expense	$	30,850	$	6,576	$	736	$	38,162
Capital expenditures	$	82,449	$	9,600	$	2,789	$	94,838
	Year Ended December 31, 2022
	Mechanical Segment		Electrical Segment		Corporate		Consolidated
Revenue	$	3,178,475	$	961,889	$	—	$	4,140,364
Cost of services		2,597,856		800,900		—		3,398,756
Gross profit		580,619		160,989		—		741,608
Selling, general and administrative expenses		345,184		99,579		44,581		489,344
Gain on sale of assets		(1,290)		(295)		—		(1,585)
Operating income	$	236,725	$	61,705	$	(44,581)	$	253,849
Amortization of identifiable intangible assets	$	19,641	$	28,154	$	—	$	47,795
Depreciation expense	$	26,658	$	6,211	$	683	$	33,552
Capital expenditures	$	43,532	$	4,101	$	726	$	48,359