Segment Information

9 Months Ended

Sep. 30, 2018

We have the following reportable segments, which provide services associated with the design, integration, installation, start-up, operation and maintenance of various systems: (a) United States electrical construction and facilities services (involving systems for electrical power transmission and distribution; premises electrical and lighting systems; process instrumentation in the refining, chemical process, food process and mining industries; low-voltage systems, such as fire alarm, security and process control; voice and data communication; roadway and transit lighting; and fiber optic lines); (b) United States mechanical construction and facilities services (involving systems for heating, ventilation, air conditioning, refrigeration and clean-room process ventilation; fire protection; plumbing, process and high-purity piping; controls and filtration; water and wastewater treatment; central plant heating and cooling; cranes and rigging; millwrighting; and steel fabrication, erection and welding); (c) United States building services; (d) United States industrial services; and (e) United Kingdom building services. The “United States building services” and “United Kingdom building services” segments principally consist of those operations which provide a portfolio of services needed to support the operation and maintenance of customers’ facilities, including commercial and government site-based operations and maintenance; facility maintenance and services, including reception, security and catering services; outage services to utilities and industrial plants; military base operations support services; mobile maintenance and services; floor care and janitorial services; landscaping, lot sweeping and snow removal; facilities management; vendor management; call center services; installation and support for building systems; program development, management and maintenance for energy systems; technical consulting and diagnostic services; infrastructure and building projects for federal, state and local governmental agencies and bodies; and small modification and retrofit projects, which services are not generally related to customers’ construction programs. The “United States industrial services” segment principally consists of those operations which provide industrial maintenance and services, including those for refineries and petrochemical plants, including on-site repairs, maintenance and service of heat exchangers, towers, vessels and piping; design, manufacturing, repair and hydro blast cleaning of shell and tube heat exchangers and related equipment; refinery turnaround planning and engineering services; specialty

welding services; overhaul and maintenance of critical process units in refineries and petrochemical plants; and specialty technical services for refineries and petrochemical plants.

The following tables present information about industry segments and geographic areas for the three and nine months ended September 30, 2018 and 2017 (in thousands):



	For the three months ended September 30,
	2018			2017
Revenues from unrelated entities:
United States electrical construction and facilities services	$	485,974		$	457,919
United States mechanical construction and facilities services	772,332			760,084
United States building services	473,701			437,107
United States industrial services	214,476			145,679
Total United States operations	1,946,483			1,800,789
United Kingdom building services	100,566			85,902
Total worldwide operations	$	2,047,049		$	1,886,691

Total revenues:
United States electrical construction and facilities services	$	486,642		$	460,066
United States mechanical construction and facilities services	783,454			767,398
United States building services	490,624			451,396
United States industrial services	214,650			147,133
Less intersegment revenues	(28,887		)	(25,204		)
Total United States operations	1,946,483			1,800,789
United Kingdom building services	100,566			85,902
Total worldwide operations	$	2,047,049		$	1,886,691



	For the nine months ended September 30,
	2018			2017
Revenues from unrelated entities:
United States electrical construction and facilities services	$	1,420,268		$	1,350,157
United States mechanical construction and facilities services	2,211,836			2,173,030
United States building services	1,389,486			1,315,401
United States industrial services	566,770			591,694
Total United States operations	5,588,360			5,430,282
United Kingdom building services	312,963			244,078
Total worldwide operations	$	5,901,323		$	5,674,360

Total revenues:
United States electrical construction and facilities services	$	1,425,190		$	1,355,206
United States mechanical construction and facilities services	2,239,660			2,197,231
United States building services	1,437,498			1,360,189
United States industrial services	568,238			593,648
Less intersegment revenues	(82,226		)	(75,992		)
Total United States operations	5,588,360			5,430,282
United Kingdom building services	312,963			244,078
Total worldwide operations	$	5,901,323		$	5,674,360



	For the three months ended September 30,
	2018			2017
Operating income (loss):
United States electrical construction and facilities services	$	34,473		$	46,583
United States mechanical construction and facilities services	58,689			57,503
United States building services	29,315			26,035
United States industrial services	8,184			(4,844		)
Total United States operations	130,661			125,277
United Kingdom building services	4,457			3,445
Corporate administration	(23,113		)	(22,632		)
Restructuring expenses	(229		)	(46		)
Total worldwide operations	111,776			106,044
Other corporate items:
Net periodic pension (cost) income	615			415
Interest expense	(3,588		)	(3,324		)
Interest income	852			277
Income from continuing operations before income taxes	$	109,655		$	103,412



	For the nine months ended September 30,
	2018			2017
Operating income (loss):
United States electrical construction and facilities services	$	106,309		$	109,735
United States mechanical construction and facilities services	155,864			151,028
United States building services	68,822			60,537
United States industrial services	12,721			16,573
Total United States operations	343,716			337,873
United Kingdom building services	12,828			7,681
Corporate administration	(65,508		)	(63,755		)
Restructuring expenses	(693		)	(954		)
Impairment loss on identifiable intangible assets	(907		)	—
Total worldwide operations	289,436			280,845
Other corporate items:
Net periodic pension (cost) income	2,069			1,209
Interest expense	(10,041		)	(9,464		)
Interest income	2,030			607
Income from continuing operations before income taxes	$	283,494		$	273,197



	September 30, 2018		December 31, 2017
Total assets:
United States electrical construction and facilities services	$	650,693	$	617,471
United States mechanical construction and facilities services	1,109,064		1,097,240
United States building services	830,019		764,085
United States industrial services	803,011		772,899
Total United States operations	3,392,787		3,251,695
United Kingdom building services	143,881		131,806
Corporate administration	459,225		582,403
Total worldwide operations	$	3,995,893	$	3,965,904