Nature of Business	6 Months Ended
Jun. 30, 2018
Nature of Business
Nature of Business	Note 1—Nature of Business Organization and operations — Primoris Services Corporation is a holding company of various construction and product engineering subsidiaries. Our underground and directional drilling operations install, replace and repair natural gas, petroleum, telecommunications and water pipeline systems, including large diameter pipeline systems. Our industrial, civil and engineering operations build and provide maintenance services to industrial facilities including power plants, petrochemical facilities, and other processing plants; construct multi-level parking structures; and engage in the construction of highways, bridges and other environmental construction activities. Our transmission and distribution operations install, replace and repair gas and electric utility systems. We are incorporated in the state of Delaware, and our corporate headquarters are located at 2100 McKinney Avenue, Suite 1500, Dallas, Texas 75201. Unless specifically noted otherwise, as used throughout these condensed consolidated financial statements, “Primoris”, “the Company”, “we”, “our”, “us” or “its” refers to the business, operations and financial results of us and our wholly-owned subsidiaries. Reportable Segments — We segregate our business into five reportable segments: the Power, Industrial and Engineering (“Power”) segment, the Pipeline and Underground (“Pipeline”) segment, the Utilities and Distribution (“Utilities”) segment, the Transmission and Distribution (“Transmission”) segment, which is a new reportable segment created in connection with the acquisition of Willbros Group, Inc. (“Willbros”), and the Civil segment. See Note 17 – “Reportable Segments” for a brief description of the reportable segments and their operations. 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. Acquisition of Willbros Group, Inc. — On June 1, 2018, we completed our acquisition of Willbros for approximately $111.0 million, net of cash and restricted cash acquired. Willbros is a specialty energy infrastructure contractor serving the oil and gas and power industries through its utility transmission and distribution, oil and gas, and Canadian operations, which principally executes industrial and power projects. The utility transmission and distribution operations are included in the Transmission segment, the oil and gas operations are included in the Pipeline segment, and the Canadian operations are included in the Power segment. See Note 6— “Business Combinations”. Other Acquisitions — On May 26, 2017, we acquired the net assets of Florida Gas Contractors (“FGC”) for $37.7 million; on May 30, 2017, we acquired certain engineering assets for approximately $2.3 million; and on June 16, 2017, we acquired the net assets of Coastal Field Services (“Coastal”) for $27.5 million. FGC operations are included in the Utilities segment, the engineering assets are included in the operations of the Power segment, and Coastal operations are included in the Pipeline segment. See Note 6— “Business Combinations”. Joint Ventures —We own a 50% interest in two separate joint ventures, both formed in 2015. The Carlsbad Power Constructors joint venture (“Carlsbad”) is engineering and constructing a gas-fired power generation facility, and the ARB Inc. & B&M Engineering Co. joint venture (“Wilmington”) is also engineering and constructing a gas-fired power generation facility. Both projects are located in Southern California. The joint venture operations are included as part of the Power segment. As a result of determining that we are the primary beneficiary of the two variable interest entities ("VIEs”), the results of the Carlsbad and Wilmington joint ventures are consolidated in our financial statements. The Wilmington project was substantially complete as of December 31, 2017, and the Carlsbad project is expected to be completed in 2018. Financial information for the joint ventures is presented in Note 10 – “Noncontrolling Interests”.

Note 1—Nature of Business

Organization and operations — Primoris Services Corporation is a holding company of various construction and product engineering subsidiaries. Our underground and directional drilling operations install, replace and repair natural gas, petroleum, telecommunications and water pipeline systems, including large diameter pipeline systems. Our industrial, civil and engineering operations build and provide maintenance services to industrial facilities including power plants, petrochemical facilities, and other processing plants; construct multi-level parking structures; and engage in the construction of highways, bridges and other environmental construction activities. Our transmission and distribution operations install, replace and repair gas and electric utility systems. We are incorporated in the state of Delaware, and our corporate headquarters are located at 2100 McKinney Avenue, Suite 1500, Dallas, Texas 75201. Unless specifically noted otherwise, as used throughout these condensed consolidated financial statements, “Primoris”, “the Company”, “we”, “our”, “us” or “its” refers to the business, operations and financial results of us and our wholly-owned subsidiaries.

Reportable Segments — We segregate our business into five reportable segments: the Power, Industrial and Engineering (“Power”) segment, the Pipeline and Underground (“Pipeline”) segment, the Utilities and Distribution (“Utilities”) segment, the Transmission and Distribution (“Transmission”) segment, which is a new reportable segment created in connection with the acquisition of Willbros Group, Inc. (“Willbros”), and the Civil segment. See Note 17 – “Reportable Segments” for a brief description of the reportable segments and their operations.

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.

Acquisition of Willbros Group, Inc. — On June 1, 2018, we completed our acquisition of Willbros for approximately $111.0 million, net of cash and restricted cash acquired. Willbros is a specialty energy infrastructure contractor serving the oil and gas and power industries through its utility transmission and distribution, oil and gas, and Canadian operations, which principally executes industrial and power projects. The utility transmission and distribution operations are included in the Transmission segment, the oil and gas operations are included in the Pipeline segment, and the Canadian operations are included in the Power segment. See Note 6— “Business Combinations”.

Other Acquisitions — On May 26, 2017, we acquired the net assets of Florida Gas Contractors (“FGC”) for $37.7 million; on May 30, 2017, we acquired certain engineering assets for approximately $2.3 million; and on June 16, 2017, we acquired the net assets of Coastal Field Services (“Coastal”) for $27.5 million. FGC operations are included in the Utilities segment, the engineering assets are included in the operations of the Power segment, and Coastal operations are included in the Pipeline segment. See Note 6— “Business Combinations”.

Joint Ventures —We own a 50% interest in two separate joint ventures, both formed in 2015. The Carlsbad Power Constructors joint venture (“Carlsbad”) is engineering and constructing a gas-fired power generation facility, and the ARB Inc. & B&M Engineering Co. joint venture (“Wilmington”) is also engineering and constructing a gas-fired power generation facility. Both projects are located in Southern California. The joint venture operations are included as part of the Power segment. As a result of determining that we are the primary beneficiary of the two variable interest entities ("VIEs”), the results of the Carlsbad and Wilmington joint ventures are consolidated in our financial statements. The Wilmington project was substantially complete as of December 31, 2017, and the Carlsbad project is expected to be completed in 2018. Financial information for the joint ventures is presented in Note 10 – “Noncontrolling Interests”.