Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Information About Industry Segments And Geographic Areas

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