Segment Information

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Segment Information

Segment Information

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; 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 our 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 segment "United States industrial services" principally consists of those operations which provide industrial maintenance and services, mainly 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 months ended March 31, 2016 and 2015 (in thousands):

	For the three months ended March 31,
	2016			2015
Revenues from unrelated entities:
United States electrical construction and facilities services	$	348,289		$	318,994
United States mechanical construction and facilities services	611,890			511,026
United States building services	439,651			439,492
United States industrial services	257,504			232,725
Total United States operations	1,657,334			1,502,237
United Kingdom building services	87,636			86,950
Total worldwide operations	$	1,744,970		$	1,589,187
Total revenues:
United States electrical construction and facilities services	$	354,104		$	320,238
United States mechanical construction and facilities services	615,232			513,367
United States building services	452,335			449,728
United States industrial services	257,870			233,316
Less intersegment revenues	(22,207		)	(14,412		)
Total United States operations	1,657,334			1,502,237
United Kingdom building services	87,636			86,950
Total worldwide operations	$	1,744,970		$	1,589,187

NOTE 13 Segment Information - (Continued)

	For the three months ended March 31,
	2016			2015
Operating income (loss):
United States electrical construction and facilities services	$	16,707		$	16,674
United States mechanical construction and facilities services	23,877			20,901
United States building services	13,902			20,978
United States industrial services	18,866			12,833
Total United States operations	73,352			71,386
United Kingdom building services	3,311			2,378
Corporate administration	(20,957		)	(18,426		)
Restructuring expenses	(91		)	(8		)
Total worldwide operations	55,615			55,330
Other corporate items:
Interest expense	(2,376		)	(2,216		)
Interest income	165			176
Income from continuing operations before income taxes	$	53,404		$	53,290

	March 31, 2016		December 31, 2015
Total assets:
United States electrical construction and facilities services	$	365,229	$	372,525
United States mechanical construction and facilities services	858,499		894,366
United States building services	724,330		721,653
United States industrial services	928,940		883,338
Total United States operations	2,876,998		2,871,882
United Kingdom building services	131,318		133,782
Corporate administration	441,343		536,993
Total worldwide operations	$	3,449,659	$	3,542,657