The following tables present information about industry segments and geographic areas for the three and nine months ended September 30, 2016 and 2015 (in thousands):



	For the three months ended September 30,
	2016			2015
Revenues from unrelated entities:
United States electrical construction and facilities services	$	458,553		$	344,389
United States mechanical construction and facilities services	697,733			587,522
United States building services	454,800			428,270
United States industrial services	239,052			241,946
Total United States operations	1,850,138			1,602,127
United Kingdom building services	73,036			97,001
Total worldwide operations	$	1,923,174		$	1,699,128

Total revenues:
United States electrical construction and facilities services	$	465,476		$	348,327
United States mechanical construction and facilities services	702,464			592,077
United States building services	469,191			442,674
United States industrial services	239,489			242,335
Less intersegment revenues	(26,482		)	(23,286		)
Total United States operations	1,850,138			1,602,127
United Kingdom building services	73,036			97,001
Total worldwide operations	$	1,923,174		$	1,699,128

NOTE 13 Segment Information - (Continued)



	For the nine months ended September 30,
	2016			2015
Revenues from unrelated entities:
United States electrical construction and facilities services	$	1,227,474		$	1,009,585
United States mechanical construction and facilities services	1,939,518			1,652,551
United States building services	1,353,248			1,303,389
United States industrial services	830,064			699,839
Total United States operations	5,350,304			4,665,364
United Kingdom building services	251,256			275,536
Total worldwide operations	$	5,601,560		$	4,940,900

Total revenues:
United States electrical construction and facilities services	$	1,249,681		$	1,016,013
United States mechanical construction and facilities services	1,950,814			1,663,259
United States building services	1,393,636			1,341,392
United States industrial services	831,111			701,226
Less intersegment revenues	(74,938		)	(56,526		)
Total United States operations	5,350,304			4,665,364
United Kingdom building services	251,256			275,536
Total worldwide operations	$	5,601,560		$	4,940,900



	For the three months ended September 30,
	2016			2015
Operating income (loss):
United States electrical construction and facilities services	$	30,927		$	25,528
United States mechanical construction and facilities services	39,447			26,926
United States building services	22,568			16,027
United States industrial services	14,586			14,340
Total United States operations	107,528			82,821
United Kingdom building services	2,591			3,358
Corporate administration	(23,516		)	(15,912		)
Restructuring expenses	(539		)	(301		)
Total worldwide operations	86,064			69,966
Other corporate items:
Interest expense	(3,479		)	(2,226		)
Interest income	161			157
Income from continuing operations before income taxes	$	82,746		$	67,897

NOTE 13 Segment Information - (Continued)



	For the nine months ended September 30,
	2016			2015
Operating income (loss):
United States electrical construction and facilities services	$	70,645		$	67,479
United States mechanical construction and facilities services	101,504			80,191
United States building services	54,761			54,944
United States industrial services	66,600			44,588
Total United States operations	293,510			247,202
United Kingdom building services	9,160			8,570
Corporate administration	(67,431		)	(52,031		)
Restructuring expenses	(1,271		)	(742		)
Total worldwide operations	233,968			202,999
Other corporate items:
Interest expense	(8,973		)	(6,650		)
Interest income	518			515
Income from continuing operations before income taxes	$	225,513		$	196,864



	September 30, 2016		December 31, 2015
Total assets:
United States electrical construction and facilities services	$	623,446	$	372,525
United States mechanical construction and facilities services	929,994		894,366
United States building services	778,507		721,653
United States industrial services	898,662		883,338
Total United States operations	3,230,609		2,871,882
United Kingdom building services	108,836		133,782
Corporate administration	555,508		536,993
Total worldwide operations	$	3,894,953	$	3,542,657