Segment Information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Information About Industry Segments And Geographic Areas

The following tables present information about industry segments and geographic areas for the three and nine months ended September 30, 2019 and 2018 (in thousands): 

	For the three months ended September 30,
	2019			2018
Revenues from unrelated entities:
United States electrical construction and facilities services	$	554,637		$	485,974
United States mechanical construction and facilities services	869,188			759,495
United States building services	532,122			473,701
United States industrial services	234,166			227,313
Total United States operations	2,190,113			1,946,483
United Kingdom building services	97,628			100,566
Total worldwide operations	$	2,287,741		$	2,047,049
Total revenues:
United States electrical construction and facilities services	$	556,088		$	486,642
United States mechanical construction and facilities services	877,571			770,617
United States building services	550,002			490,624
United States industrial services	247,258			227,487
Less intersegment revenues	(40,806		)	(28,887		)
Total United States operations	2,190,113			1,946,483
United Kingdom building services	97,628			100,566
Total worldwide operations	$	2,287,741		$	2,047,049

	For the nine months ended September 30,
	2019			2018
Revenues from unrelated entities:
United States electrical construction and facilities services	$	1,652,109		$	1,420,268
United States mechanical construction and facilities services	2,444,683			2,168,127
United States building services	1,567,899			1,389,486
United States industrial services	788,271			610,479
Total United States operations	6,452,962			5,588,360
United Kingdom building services	317,709			312,963
Total worldwide operations	$	6,770,671		$	5,901,323
Total revenues:
United States electrical construction and facilities services	$	1,655,147		$	1,425,190
United States mechanical construction and facilities services	2,465,287			2,195,951
United States building services	1,622,509			1,437,498
United States industrial services	809,510			611,947
Less intersegment revenues	(99,491		)	(82,226		)
Total United States operations	6,452,962			5,588,360
United Kingdom building services	317,709			312,963
Total worldwide operations	$	6,770,671		$	5,901,323

	For the three months ended September 30,
	2019			2018
Operating income (loss):
United States electrical construction and facilities services	$	33,630		$	34,473
United States mechanical construction and facilities services	61,213			59,236
United States building services	35,051			29,315
United States industrial services	5,561			7,637
Total United States operations	135,455			130,661
United Kingdom building services	4,754			4,457
Corporate administration	(24,341		)	(23,113		)
Restructuring expenses	(119		)	(229		)
Total worldwide operations	115,749			111,776
Other corporate items:
Net periodic pension (cost) income	381			615
Interest expense, net	(2,678		)	(2,736		)
Income from continuing operations before income taxes	$	113,452		$	109,655

	For the nine months ended September 30,
	2019			2018
Operating income (loss):
United States electrical construction and facilities services	$	120,380		$	106,309
United States mechanical construction and facilities services	156,152			156,273
United States building services	90,535			68,822
United States industrial services	31,209			12,312
Total United States operations	398,276			343,716
United Kingdom building services	14,371			12,828
Corporate administration	(74,062		)	(65,508		)
Restructuring expenses	(567		)	(693		)
Impairment loss on identifiable intangible assets	—			(907		)
Total worldwide operations	338,018			289,436
Other corporate items:
Net periodic pension (cost) income	1,187			2,069
Interest expense, net	(8,732		)	(8,011		)
Income from continuing operations before income taxes	$	330,473		$	283,494

	September 30, 2019		December 31, 2018
Total assets:
United States electrical construction and facilities services	$	820,229	$	702,112
United States mechanical construction and facilities services	1,228,920		1,080,829
United States building services	984,514		846,221
United States industrial services	872,115		864,622
Total United States operations	3,905,778		3,493,784
United Kingdom building services	163,069		146,379
Corporate administration	463,874		448,644
Total worldwide operations	$	4,532,721	$	4,088,807