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Nature of Business (Tables) | 12 Months Ended
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Dec. 31, 2017
Nature of Business |
Schedule of list of primary operating subsidiaries and their reportable segment |
Business Unit |  | Reportable Segment |  | Prior Reportable Segment |
ARB Industrial (a division of ARB, Inc.) |  | Power |  | West |
ARB Structures |  | Power |  | West |
Primoris Power (formerly PES Saxon division) |  | Power |  | Energy |
Primoris Renewable Energy (a division of Primoris AV) |  | Power |  | Energy |
Primoris Industrial Constructors (formerly PES Industrial Division) |  | Power |  | Energy |
Primoris Fabrication (a division of PES) |  | Power |  | Energy |
Primoris Mechanical Contractors (a combination of a division of PES and Cardinal Contractors) |  | Power |  | Energy |
OnQuest |  | Power |  | Energy |
OnQuest Canada |  | Power |  | Energy |
Primoris Design and Construction (“PD&C”); created 2017 |  | Power |  | NA |
Rockford Corporation (“Rockford”) |  | Pipeline |  | West |
Vadnais Trenchless Services (“Vadnais Trenchless”) |  | Pipeline |  | West |
Primoris Field Services (a division of PES Primoris Pipeline) |  | Pipeline |  | Energy |
Primoris Pipeline (a division of PES Primoris Pipeline) |  | Pipeline |  | Energy |
Primoris Coastal Field Services; created 2017 |  | Pipeline |  | NA |
ARB Underground (a division of ARB, Inc.) |  | Utilities |  | West |
Q3 Contracting (“Q3C”) |  | Utilities |  | West |
Primoris AV |  | Utilities |  | Energy |
Primoris Distribution Services ("PDS"); created 2017 |  | Utilities |  | NA |
Primoris Heavy Civil (formerly JCG Heavy Civil Division) |  | Civil |  | East |
Primoris I&M (formerly JCG Infrastructure & Maintenance Division) |  | Civil |  | East |
Primoris Build Own Operate |  | Civil |  | East |

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