Segment Information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Financial Information by Reportable Segment

The following tables present financial information for each of our reportable segments for the three and nine months ended September 30, 2023 and 2022 (in thousands): 

	For the three months ended September 30,
	2023		2022
Revenues from unrelated entities:
United States electrical construction and facilities services	$	697,406	$	633,383
United States mechanical construction and facilities services	1,329,600		1,108,655
United States building services	817,718		719,383
United States industrial services	252,148		247,239
Total United States operations	3,096,872		2,708,660
United Kingdom building services	110,726		117,701
Total operations	$	3,207,598	$	2,826,361
Total revenues:
United States electrical construction and facilities services	$	697,897	$	634,957
United States mechanical construction and facilities services	1,342,149		1,125,162
United States building services	846,400		744,801
United States industrial services	252,244		266,182
Less intersegment revenues	(41,818)		(62,442)
Total United States operations	3,096,872		2,708,660
United Kingdom building services	110,726		117,701
Total operations	$	3,207,598	$	2,826,361

	For the nine months ended September 30,
	2023		2022
Revenues from unrelated entities:
United States electrical construction and facilities services	$	2,020,319	$	1,719,525
United States mechanical construction and facilities services	3,602,271		3,158,948
United States building services	2,318,105		2,041,555
United States industrial services	875,314		842,524
Total United States operations	8,816,009		7,762,552
United Kingdom building services	327,643		363,746
Total operations	$	9,143,652	$	8,126,298
Total revenues:
United States electrical construction and facilities services	$	2,022,557	$	1,724,400
United States mechanical construction and facilities services	3,650,875		3,187,117
United States building services	2,397,944		2,116,385
United States industrial services	883,808		878,123
Less intersegment revenues	(139,175)		(143,473)
Total United States operations	8,816,009		7,762,552
United Kingdom building services	327,643		363,746
Total operations	$	9,143,652	$	8,126,298

NOTE 14 - Segment Information (Continued)

	For the three months ended September 30,
	2023		2022
Operating income (loss):
United States electrical construction and facilities services	$	63,127	$	35,558
United States mechanical construction and facilities services	138,476		90,500
United States building services	57,156		46,041
United States industrial services	(174)		(1,392)
Total United States operations	258,585		170,707
United Kingdom building services	8,869		8,369
Corporate administration	(30,121)		(28,982)
Impairment loss on long-lived assets	(2,350)		—
Total operations	234,983		150,094
Other items:
Net periodic pension (cost) income	(284)		1,025
Interest expense, net	(90)		(3,194)
Income before income taxes	$	234,609	$	147,925

	For the nine months ended September 30,
	2023		2022
Operating income (loss):
United States electrical construction and facilities services	$	154,365	$	90,646
United States mechanical construction and facilities services	344,550		225,545
United States building services	140,943		108,698
United States industrial services	22,733		18,324
Total United States operations	662,591		443,213
United Kingdom building services	20,220		25,372
Corporate administration	(93,901)		(80,890)
Impairment loss on long-lived assets	(2,350)		—
Total operations	586,560		387,695
Other items:
Net periodic pension (cost) income	(840)		3,288
Interest expense, net	(4,614)		(6,234)
Income before income taxes	$	581,106	$	384,749

NOTE 14 - Segment Information (Continued)

	September 30, 2023		December 31, 2022
Total assets:
United States electrical construction and facilities services	$	1,173,992	$	1,078,405
United States mechanical construction and facilities services	2,159,947		1,835,001
United States building services	1,415,194		1,206,518
United States industrial services	586,360		552,545
Total United States operations	5,335,493		4,672,469
United Kingdom building services	262,629		255,547
Corporate administration	626,071		596,591
Total operations	$	6,224,193	$	5,524,607