Note 17—Reportable Segments

We segregate our business into five reportable segments: the Power segment, the Pipeline segment, the Utilities segment, the Transmission segment, which is a new reportable segment created in connection with the acquisition of Willbros, and the Civil segment. Each of our reportable segments is comprised of similar business units that specialize in services unique to the segment. Driving the end-user focused segments are differences in the economic characteristics of each segment, the nature of the services provided by each segment; the production processes of each segment; the type or class of customer using the segment’s services; the methods used by the segment to provide the services; and the regulatory environment of each segment’s customers.

The classification of revenue and gross profit for segment reporting purposes can at times require judgment on the part of management. Our segments may perform services across industries or perform joint services for customers in multiple industries. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs and indirect operating expenses, were made.

The following is a brief description of the reportable segments:

The Power segment operates throughout the United States and specializes in a range of services that include full EPC project delivery, turnkey construction, retrofits, upgrades, repairs, outages, and maintenance for entities in the petroleum, petrochemical, water, and other industries.

The Pipeline segment operates throughout the United States and specializes in a range of services, including pipeline construction, pipeline maintenance, pipeline facility work, compressor stations, pump stations, metering facilities, and other pipeline related services for entities in the petroleum and petrochemical industries.

The Utilities segment operates primarily in California, the Midwest, and the Southeast regions of the United States and specializes in a range of services, including utility line installation and maintenance, gas and electric distribution, streetlight construction, substation work, and fiber optic cable installation.

The Transmission segment operates primarily in the Southeastern and Gulf Coast regions of the United States and specializes in a range of services in electric and gas transmission and distribution, including comprehensive engineering, procurement, maintenance and contruction, repair, and restoration of utility infrastructure.

The Civil segment operates primarily in the Southeastern and Gulf Coast regions of the United States and specializes in highway and bridge construction, airport runway and taxiway construction, demolition, heavy earthwork, soil stabilization, mass excavation, and drainage projects.

All intersegment revenue and gross profit, which were immaterial, have been eliminated in the following tables.

Segment Revenue

Revenue by segment for the three and six months ended June 30, 2018 and 2017 were as follows (in thousands):


	For the three months ended June 30,
	2018			2017
			% of			% of
			Total			Total
Segment	Revenue		Revenue	Revenue		Revenue
Power	$	167,001	25.7%	$	157,773	25.0%
Pipeline		90,605	14.0%		134,623	21.3%
Utilities		228,852	35.3%		212,942	33.8%
Transmission (1)		42,454	6.5%		—	0.0%
Civil		119,875	18.5%		125,827	19.9%
Total	$	648,787	100.0%	$	631,165	100.0%

(1)

Represents results from the June 1, 2018 acquisition date of Willbros to June 30, 2018.


	For the six months ended June 30,
	2018			2017
			% of			% of
			Total			Total
Segment	Revenue		Revenue	Revenue		Revenue
Power	$	333,556	28.9%	$	289,013	24.2%
Pipeline		148,188	12.9%		318,068	26.7%
Utilities		395,562	34.3%		329,922	27.7%
Transmission (1)		42,454	3.7%		—	0.0%
Civil		233,146	20.2%		255,664	21.4%
Total	$	1,152,906	100.0%	$	1,192,667	100.0%

(1)

Represents results from the June 1, 2018 acquisition date of Willbros to June 30, 2018.

Segment Gross Profit

Gross profit by segment for the three and six months ended June 30, 2018 and 2017 were as follows (in thousands):


	For the three months ended June 30,
	2018			2017
			% of			% of
			Segment			Segment
Segment	Gross Profit		Revenue	Gross Profit		Revenue
Power	$	20,526	12.3%	$	18,132	11.5%
Pipeline		10,678	11.8%		39,366	29.2%
Utilities		34,564	15.1%		32,347	15.2%
Transmission (1)		5,721	13.5%		—	0.0%
Civil		(70)	(0.1%)		(5,362)	(4.3%)
Total	$	71,419	11.0%	$	84,483	13.4%

(1)

Represents results from the June 1, 2018 acquisition date of Willbros to June 30, 2018.


	For the six months ended June 30,
	2018			2017
			% of			% of
			Segment			Segment
Segment	Gross Profit		Revenue	Gross Profit		Revenue
Power	$	44,597	13.4%	$	33,656	11.6%
Pipeline		18,569	12.5%		67,491	21.2%
Utilities		43,615	11.0%		40,620	12.3%
Transmission (1)		5,721	13.5%		—	0.0%
Civil		3,477	1.5%		(2,231)	(0.9%)
Total	$	115,979	10.1%	$	139,536	11.7%

(1)

Represents results from the June 1, 2018 acquisition date of Willbros to June 30, 2018.

Segment Goodwill

The amount of goodwill recorded by each segment at June 30, 2018 and at December 31, 2017 is presented in Note 7 – “Goodwill and Intangible Assets”.

Geographic Region — Revenue and Total Assets

The majority of our revenue is derived from customers in the United States with approximately 1.4% generated from sources outside of the United States, principally in Canada. At June 30, 2018 and December 31, 2017, approximately 2.2% of total assets were located outside of the United States.